Sigrity Version History

Two new options have been added to the Edit Cutting Polygon window; Split Open Nets and Remove Isolated Shapes. These options help identify disconnected net segments and automatically remove isolated shapes created during the cutting polygon process, resulting in cleaner and more manageable layouts.

Layout Workbench now provides advanced editing support for rigid-flex designs in the Clarity, PowerSI, and PowerDC workflows. The Stackup Editor and Zone Editor, available from the General tab of the window accessed from Tools > Options > Edit Options, allow for more efficient creation, modification, and management of stackups and zones.

The Sanitize Layout window includes the following new options to reduce the cleanup effort and minimize simulation failures caused by zone boundary issues in rigid-flex designs.

• Align Zone Boundary: Aligns adjacent zone boundaries present in a rigid-flex design by automatically correcting the minor gaps and overlaps that could prevent the simulation.
• Confine Shape to Zone Boundary: Trims shapes to zone boundaries by removing overlapping portions where the corresponding layer is not present, ensuring that the shape conforms to a valid zone area within a rigid flex design.

The Analysis Model Manager and PowerTree now support the Power Rating property for discrete components through updated UI fields and property panels. This allows for automatic power-to-current conversion.

An option, Import Blocks Connections, has been added in PowerTree. This option allows you to import multi-board block connections from a PowerTree template or connector CSV, reducing the need for manual setup.

PowerTree now retains parser settings across sessions, reducing setup time for each design.

The PowerTree Block Definition panel now in multi-board designs now supports searchable connection fields for quick component lookup.

Selecting a component in the PowerTree canvas now automatically highlights and shows the corresponding entry in the Edit Properties panel, making it easier to navigate and manage large designs.

Define the DNE3D keyword under the Package Description Lines section in the .spdx file to prevent the selected 3D component data from being exported to external format while retaining it for visualization and analysis.

Format: .Package $Package DNE3D = 1

The DXF Layer Stackup window now includes the die_outline layer type in the Type field. This enables the die outline information to be defined directly during DXF import for improved design representation.

The DXF Layer Stackup window now includes the Import Net List option to import the net list data during layer stackup configuration to streamline the DXF-to-SPD translation workflow.

A new Multiple Frequency model type is available in the Advanced Package eXtractor, enabling broadband S-parameter extraction workflows for both net-based and pin-based simulations.

The Electrical Performance Assessment workflow has been added to analyze package electrical performance. The workflow will guide users through package configuration, analysis setup, result review, and report generation with support to include existing capacitor and die-model definitions during the assessment.

Two new TCL commands have been added.

• sigrity::generateTVSmodel – Generates a through-silicon via (TSV) model from a TSV location file and a unit TSV geometry (SPD) file generated with GDS2SPD Translator. This command automatically simulates large arrays of repeated TSV structures while preserving the interactions between TSVs.
• sigrity::generateTVSmodel -ploc – Generates a TSV model with a PLOC file and a unit TSV geometry file. This command automatically simulates large arrays of repeated TSV structures while preserving the interactions between TSVs.

The starting frequency can now be set to 0Hz in setup for simulation. This allows 0Hz data to be included from PowerSI frequency sweeps, improving consistency between the two tools and providing a complete, low-frequency analysis result.

Power ratings can now be used when creating discrete components. The specified power rating is automatically converted to the corresponding maximum current, simplifying component setup.

A new option, Save to AMM Library, in the Set up Sinks editor saves selected sink models to an AMM library for reuse in future projects.

PowerDC now flags the VRMs that exceed configured output current limits. If this occurs, the pass or fail status is indicated in VRM Voltage Results.

A Sense Results table has been added to the Electric Result Table section in the generated simulation report. This table reports VRM-to-sense and sense-to-sink IR drop values for single board designs.

The following TCL commands have been added to PowerDC.

• sigrity::export pdfcDCDiagram -FileName {pdc_dcblock_diagram.csv} – Exports DC block diagram results from an IR drop report to a CSV file.
• sigrity::set pdfcUseSinkInternalPinVoltage {0|1} – Selects the sink voltage reporting point for IR drop results and displays results based on external or internal nodes.

PowerSI now performs port generation automatically as part of the Advanced DC+AC Fit Workflow, simplifying simulation setup and eliminating the need to configure a separate analysis flow. This enhancement extends support for complex circuit components, including multi-terminal components and components with non-ground pins. The integrated workflow also supports DC-AC fitting for circuit ports and generates DC and DC-AC fitted results instead of separate AC results.

The Setup Dialog box now shows configuration options based on the solver selected for simulation, allowing for easier optimization of computer resources.

The computer resource settings window now includes a Localhost option to distribute a simulation run using SSH. If this option is selected, the local computer is included as the first machine in the computer list and used for preprocessing before the simulation starts. If unchecked, the local system connects to the first computer in the list using SSH for preprocessing after the simulation starts.

PowerSI now supports a server farm mode, bsub/script/nc, for simulating a design in Linux. This provides greater flexibility when configuring server farm environments by supporting multiple job submission methods, including script-based execution, while enabling distributed simulation setup and resource management. This simplifies deployment in diverse computing environments and improves support for customized cluster workflows.

Use the SHP_NODE command to automatically create nodes at the center of specified pad shapes during the translation process. This simplifies the node creation process and reduces manual effort.

Use the CIRCLE_EXT_TOL command to specify the tolerance for converting polygon geometries to circles during the translation process.

The MERGE_CELL_RING_VIA option has been added to support correct generation of connected vias in cell ring structures. This enhancement improves translation accuracy for cell ring via merging and ensures reliable connectivity in the generated database.

The OASIS to SPD Translator user interface now includes updated field names and layout refinements. These improvements provide a cleaner and more intuitive experience through improved spacing, clearer labeling, and overall usability enhancements.

The GDS to SPD Translator UI has been enhanced with a reorganized tab structure and new tab names. The Design tab has been renamed to Options and the Text Labels tab has been renamed to Labels. Additionally, the Labels and GDS Block tabs have been updated for easier navigation and improved usability.

The Model component type has been added to include existing capacitor and die-model definitions during electrical performance assessment, reducing manual setup effort.

The User Guide includes a new topic, DXF Import Mapping Support in XtractIM, covering the DXF2SPD workflow. This topic describes how to translate DXF layouts into SPD designs, including layer and connectivity mapping, die and lead generation, wire bond configuration, stacked die support, package pin assignment, and package outline definition.

Support for TSV Modeling settings has been added to the workflow panel to provide a centralized location to configure TSV (through-silicon via) modeling parameters. Electrical and physical TSV characteristics can be defined with geometry or SPICE-based models.

Support for encrypted iRXC files has been added, allowing the secure import and use of encrypted extraction data in XcitePI.

The -MPIPE command syntax has been updated to VF_MPIPE:1 [0/1].

The Windowing calculation window can now be accessed with the Measure Waveform shortcut menu in the plot area of the 2D Curve tab. The following enhancements have been added to streamline data analysis and result management:

• Export calculation results to a CSV file
• Plot calculation results directly from the dialog box with the Add New Plot Curve View button
• Use the Show Details shortcut menu option to return the appropriate point when multiple points share the same value
• Work with all supported probe types and automatically identify relevant points when duplicate values exist
• Save and load marker templates for reuse
• Copy the tooltip content directly from the plot
• Maintain consistent marker displays across viewers

These enhancements simplify data analysis, reduce manual post-processing, and simplify comparison, documentation, and sharing of measurement results.

A new Grid Curve Viewer option is available from the dropdown that opens upon right-clicking the plot area of the 2D Curves tab. The Grid Curve Viewer window displays each visible waveform in its own pane, making it easier to inspect, compare, and organize large sets of curves without crowding a single plot.

Key features include:

• Grid-based curve display: Display the visible curves from the current plot in a grid layout with one curve displayed per pane for easier analysis.
• Configurable layouts: Choose grid layouts from 1×1 to 8×8. Scroll bars are provided if the number of curves exceeds the available panes.
• Synchronized Operations: Use Apply to All Views to perform actions across all panes simultaneously.
• Flexible Curve Organization: Rearrange, copy, move, combine, and separate curves with drag-and-drop, keyboard shortcuts, or dropdown menu commands.
• View Management: Insert and delete panes, sort layouts, restore the original arrangement, and navigate quickly with the curve list.

A new Filter button in the 2D Curves tab helps quickly find and display the curves relevant to the current analysis. The Curve Filter window can be used to filter curves by attributes such as result type, block, location, bus group, and signal; eliminating the need to manually select curves from large waveform lists. Filter settings are retained and applied across curve groups for a more efficient review workflow.

An Autoextract BBS Model option is available in the properties of S Parameter,SPICE Subcircuit, and N-term IC blocks. When enabled, referenced S-Parameter models are automatically converted to Broadband SPICE (BBS) equivalent circuit models during a simulation and used for transient power integrity analysis. This capability helps improve the correlation between SPDsim and circuit simulators such as Spectre and HSpice, while simplifying the model preparation for time-domain power integrity simulations.

The size of the icons displayed in the floating toolbar can now be switched between small (S) and large (L) based on display preferences and workspace requirements. This enhancement improves toolbar visibility on high-resolution displays and provides greater flexibility in managing screen space.

The Parallel Bus Analysis (PBA) workflow now supports DDR measurement reports for the next-generation memory technologies LPDDR6 and HBM4. This expands DDR measurement coverage for power-sensitive and high-performance designs, as well as data-intensive applications.

Topology Workbench now supports simulating IBIS-EMD models, enabling complex electrical modules defined in EMD files to be represented and simulated as a single component. This capability simplifies the setup of complex memory and multi-component designs by eliminating the need to manually instantiate and connect individual IBIS components while preserving compatibility with the Parallel Bus Analysis and Topology Explorer transient analysis workflows.

All Topology Workbench workflows and AMI models now support linear buffer models for Transmitter, Receiver, Controller SPICE, and Memory SPICE blocks.

The Parallel Bus Analysis workflow supports simultaneous read and write simulations through a new Reverse Read/Write option available for bus groups in the Analysis Options panel. This option reverses the I/O direction of signals within a bus group without recreating the topology, making it easier to evaluate bidirectional interfaces and explore additional traffic scenarios using the same design configuration.

Transient circuit simulation can now be run directly within the Serial Link Analysis (SLA) workflow through SPDsim, Spectre, or HSPICE; eliminating the need to switch to the Topology Explorer workflow. This revised workflow reuses the existing SLA topology, models, stimulus configuration, and distributed computing settings, making it easier to compare channel-based and circuit-based simulation results while maintaining a consistent analysis environment.

The SLA workflow adds the following enhancements to simplify the setup, simulation, and analysis of multiple receiver channels in a single channel-simulation run:

• Component-Based Model Selection: The Analysis Options panel uses a tree-based component view in the Tx and Rx tabs, replacing the previous signal-based tabbed layout. The new interface eases management of multi-channel designs and retains signal-level controls for I/O model, jitter, and noise settings.
• Multiple Primary Receiver Selection: Multiple receiver channels can be designated as the primary channels in the Analysis Options panel. This capability enables multiple victim channels to be analyzed in a single simulation run.
• Multiple Victim Channel Selection: The Victim Rx column in the Connectivity Checker panel can be used to select multiple victim receiver channels for analysis. Selected channels are automatically included as primary channels, streamlining channel selection and connectivity validation within a single workflow.
• Multi-channel Results and Reporting: Results for all selected primary receiver channels are generated in a single simulation run and organized by the receiver channel. Waveforms, eye diagrams, and channel reports can be reviewed together, making it easier to compare channel behavior and identify crosstalk effects across multiple receivers.

The SLA workflow now supports comprehensive characterization for multi-channel analysis to evaluate all selected channels in a single simulation run. Each channel response includes the desired signal and crosstalk from other active channels, providing a more realistic representation of channel behavior and enabling direct comparison of channel responses.

This feature allows designers to:

• Enable comprehensive characterization: Enabling the appropriate toggle button in the Options window characterizes all selected channels together instead of individually.
• Simulate all selected Tx channels together: The Seed Control list in the Channel Simulation tab of the Analysis Options panel sets the coordinated aggressor-stimulus relationship to Even or Random.
• Generate a single characterization input: A single input file is created for all selected channels, replacing multiple characterization inputs.
• Compare channels in one result set: View and compare all characterized channels in 2D Curves, 3D Eye Density, and Channel Reports.

The Compliance Kit workflow now includes a PCIe 7 Compliance workflow for validating PCI Express Gen 7 designs. The workflow provides two new templates to configure and run PCIe 7 compliance validation more efficiently. Use pcie7_thru for through-channel analysis and pcie7_xy for channel analysis with crosstalk.

SystemPI now supports switching and random noise sources for VDC-based VRM blocks in the PDN Impedance and Power Ripple Analysis workflow, enabling more accurate simulation of voltage regulator behavior. Switching or random noise sources can be introduced into a voltage regulator simulation. By incorporating potential noise effects into VRM simulations, this enhancement helps uncover potential power delivery issues earlier in the design process and improves the accuracy of power integrity and signal integrity validation.

The Die Model Editor now supports editing multiple current profiles within a die model from a single interface. To support this use model, the Apply button has been replaced with Apply to Current Curve and Apply to All Curves to update individual profiles or apply changes across multiple current curves simultaneously. This enhancement simplifies the management of die models with multiple profiles and reduces repetitive editing tasks.

Context-sensitive help is now available in all in-design analysis workflow windows. Clicking Help opens the documentation topic for the active window in Doc Assistant, providing immediate access to information about options, settings, and configuration parameters without leaving the workflow.

The Reflection workflow supports reusable LayoutLink or System Configuration files (.lcf), enabling reflection analysis of interconnects defined across linked designs within a system configuration. Designers can create reusable System Configuration or LayoutLink files that capture multi-design connectivity, participating layouts, topology information, and analysis profiles. A LayoutLink profile can be selected to analyze a specific system configuration without manually recreating system connectivity within the workflow.

The Reflection Workflow supports system-level analysis across multiple connected PCB and package designs. Connectivity between layouts is defined through a System Configuration or LayoutLink (.lcf) file, allowing signal behavior to be evaluated across the entire system instead of a single board or package.

The Interconnect Model Extraction (IME) workflow now supports direct generation of SPICE compatible circuit models from layout structures for circuit simulation and analysis. The Clarity 3D QS (RLGC) extraction engine in the IME workflow can be used to generate RLGC-based circuit models, which typically capture resistance, inductance, capacitance, and conductance characteristics of interconnects, for SPICE-based simulations. This enhancement expands the extraction and modeling options available in the IME workflow alongside the existing PowerSI and Clarity 3D FEM solvers for S-Parameter models.

The AI Antenna Designer has been introduced in Clarity 3D Layout to automate antenna topology generation and optimization. The user defines an antenna design region and specifies performance targets, and the designer utilizes AI-driven optimization to generate efficient antenna structures with minimal manual effort. The Antenna Designer can be used to:

• Define the antenna design area and excitation port
• Specify performance targets such as frequency range and return loss
• Automatically explore design variations with AI-guided optimization
• Monitor convergence and review iteration-wise results

The solution supports configurable optimization settings, including iteration count, parallel execution, and CPU allocation, enabling efficient use of computational resources. Additionally, the best-generated design can be passed to a fine-tuning stage for further refinement. This feature significantly reduces design time by minimizing manual iterations and providing faster convergence to optimized antenna solutions.

Clarity 3D Power Integrity (Clarity PI) is specifically designed to address low-frequency power integrity (PI) challenges in sub-wavelength designs, including ICs, interposers, and advanced packaging. Built on the Clarity platform, it combines a next-generation IC-3D electromagnetic solver, Advanced Frequency Sweep (AFS), and optional AI Mesh technology to deliver highly accurate broadband PI analysis from low to high frequencies. The new solver provides improved numerical stability at low frequencies, reducing false resonances and producing more reliable simulation results while significantly accelerating performance for low-frequency problems.

Clarity PI also introduces intelligent frequency sweeping and AI-driven meshing technologies to further improve simulation efficiency. The default AFS technology achieves accurate broadband results using fewer frequency points, reducint simulation time; while the optional AI Mesh technology predicts the final mesh and accelerates the adaptive mesh refinement (AMR) process. Together, these implementations provide stable, accurate, and high-performance PI analysis, enabling faster simulation turnaround and improved productivity compared to traditional low-frequency simulation approaches.

Optimality now supports two statistical analysis flows; Monte Carlo and Fast Monte Carlo. These flows enable efficient evaluation of design variability, sensitivity, and yield using advanced statistical sampling techniques.

The Monte Carlo flow evaluates the impact of design parameter valuations by generating multiple statistical samples and analyzing the resulting output behavior. To run Monte Carlo analysis, define input parameters and assign a Uniform or Normal property distribution. Also, apply advanced sampling techniques such as Latin Hypercube or Low-Density Sequence (LDS) to efficiently explore the design space. The flow provides statistical insight into design robustness, sensitivity, and yield through convergence histories, result tables, and histogram-based visualizations; helping engineers understand performance variability and the likelyhood of outcomes occurring within specific ranges.

Fast Monte Carlo provides a faster alternative to traditional Monte Carlo analysis by using advanced statistical sampling and machine learning to reduce the number of simulations required. It delivers similar statistical insights and yield estimates with significantly lower run times, making it well-suited for early design exploration and optimization studies where rapid feedback is important. By reducing computational effort while maintaining the quality of statistical analysis, Fast Monte Carlo enables quicker assessment of design variations and accelerates decision-making during the design process.

The Cut and Stitch flow in Clarity 3D Layout now supports rigid-flex designs, enabling more accurate modeling and analysis of complex PCB structures. Cutting zones can be imported from a rigid-flex designs and corresponding .sdps files can be generated for each zone. Port assignment at cutting edges has been enhanced for improved robustness. Clarity 3D Layout first attempts to assign a wave port; if unsuccessful, it automatically falls back to a circuit port. In such cases, the trace at the cutting edge is used as the positive node, and the nearest ground reference is automatically identified. Ground selection prioritizes adjacent upper or lower layers, followed by the closest ground on the same layer.

In addition, to ensure consistency during a simulation, the bend angle defined in the rigid-flex design is automatically set to 0 when the Cut and Stitch flow is enabled, effectively flattening the structure for analysis.

Graphics Processing Units (GPUs) can now be leveraged to accelerate simulation runs in Clarity 3D Layout and Clarity 3D Workbench on the Linux platform. GPUs are used to speed up compute-inverse and highly parallel operations, such as matrix computations and numerical solving, helping reduce overall simulation time for complex designs. For GPU-related options, select Clarity X Solver Studio from the Choose License Suites dialog box.

A new meshing algorithm, LXMesh, has been introduced to Clarity 3D Layout. This algorithm replaces the previous LMesh algorithm and provides performance improvements over LMesh, while addressing a broader range of complex meshing scenarios. LXMesh is designed to improve meshing efficiency and robustness, enabling Clarity to handle more challenging mesh-related cases effectively.

An option to Convert Edge Traces to Shapes has been added to the Edit Cutting Boundary window in Clarity 3D Layout. This option converts edge traces that intersect the cutting polygon to shapes during preview, producing cleaner cuts and improving mesh quality. The resulting clean cut geometry also facilitates wave port generation.

A Preview checkbox has been added to the Rotate and Translate windows to preview the updated position of the part directly on the 3D Modeler canvas before applying the change. This allows quick and accurate verification of part placement.

A Config BC Precedence option has been added to the Simulation tab. This feature can be used to explicitly define the precedence order in which boundary conditions are applied during a simulation. When multiple boundary conditions affect a design, the defined order determines which condition takes priority, providing consistent and repeatable simulation results, especially for complex design scenarios.

A Short Distance section has been added to the Analyze Entry window to identify vertices, edges, and faces closer than a specified distance. This helps detect geometry issues that can lead to meshing failures, Boolean operation errors, or reduced performance.

An option to download remote simulation files has been added to the Results tab to enable the downloading of files generated by remote simulation runs. When a simulation finishes, view the available files, select the required files, and download them to make it easier to access and review them.

The post-processing capabilities in Clarity 3D Solver have the following enhancements:

• The Range Mode option now provides more flexible control over how the color bar legend ranges are calculated. Color bar labels are also automatically spaced and resized based on the selected range and view, improving readability and reducing label overlap.
• The default naming convention for 3D Far Field, 2D Far Field, Slice, Clip, ProbeLine, and ProbePoint objects has been updated. The first instance of each object now starts with 1, providing a more intuitive and consistent naming sequence.
• The horizontal and vertical markers can now highlight the values at the curves where the reference line intersects.
• The ProbePoint table now supports multiple probe points, allowing multiple probe locations within a single setup. This makes it easier to compare field values at different locations and reduces the need to create separate probe point objects. Additionally, the table view now captures the values across all frequencies.
• Clarity 3D Layout and Clarity 3D Workbench now display common property values for multiple selected objects. When multiple objects are selected, the Properties panel displays only the properties shared by all selected objects. Properties with identical values are shown, while properties with differing values are left blank. Common actions, such as editing shared properties, showing/hiding objects or plots, and deleting objects, can also be performed across the selection. This functionality simplifies comparison and bulk editing of multiple objects, improving productivity, and reducing the risk of unintended changes.

The Switch License option has been added for quick access to the Choose License Suites window, allowing the user to change the license suite without restarting the workflow. This option is available only when the Multiphysics GUI Pool license suite is selected.

When the DC Only D3D FEM option is selected in the DC Point Solver dropdown, the Frequency Settings controlled are automatically disabled, indicating that the simulation is limited to a DC-only solution and that no frequency sweep or frequency-dependent analysis will be performed. This helps prevent invalid frequency-related settings and simplifies DC-only simulation setup.

A Non-Reference Copy checkbox has been added to the Linear Pattern window to allow copied parts to be created as independent objects. When checked, changes made to the source part are not propagated to the copied parts. This provides greater flexibility for modifying the copied parts independently without affecting the original part or other copies.

The Load Python File and Python Editor commands have been added to the Scripting tab. Load Python File loads an external Python script, while Python Editor displays or hides Python Editor in the Python Console panel for interactive script development and execution. This allows Python scripts to be easily run, edited, and debugged directly within Clarity 3D Workbench.

The Sub Window Mode option has been added to the Window tab for easy switching from the default tabbed view to a tiled MDI window layout. The Sub Window mode allows multiple views to be displayed simultaneously, windows to be resized and arranged, and for comparison of results side by side. The Minimize All, Tile All, and Cascade All commands have also been added to the Window tab to help organize and manage multiple sub-windows within the workspace.

The options in the Healing group in the Modeler tab have been reorganized to ease access to geometry repair, detection, and analysis tools. Frequently used options are now available directly on the ribbon, while additional options are consolidated under the Advanced Healing menu, improving usability and workflow efficiency.

Clarity 3D Workbench now supports custom menus. The user interface can be extended and tailored through custom ribbon tabs, controls, and actions. Menu customizations are defined in a JSON configuration file loaded at startup. The Clarity 3D Workbench interface can be configured to support specific workflow requirements.

Clarity 3D Workbench now supports an ECAD-MCAD co-design flow that streamlines the setup of full-system 3DEM simulations. Designs prepared in Allegro can carry mapped MCAD geometry and encrypted 3D component data into Clarity 3D Layout and Clarity 3D Workbench, helping preserve relevant materials, nets, ports, and component information throughout the design transfer process. This flow reduces the manual effort traditionally required to assemble and position ECAD and MCAD data separately, enabling faster preparation of SI, PI, EMC, and EMI simulation scenarios.

The Showtech File Selection Dialog checkbox is now available in the File > Translator tab of the Options window. When selected, the GDS2SPD Translator window is displayed during .gds file import, allowing the user to specify the required technology (.tech) and mapping (.map) files for the GDS-to-SPD translation. This enhancement also supports recording reusable TCL or Python commands to automate GDS import workflows, reduce manual effort, and ensure consistent results.

The sigrity::update object TCL command now supports Renormalize Type, Reference Impedance (Real), and Reference Impedance (Imag) properties for Port and WavePort objects, enabling more precise control of port renormalization and impedance settings during simulation.

The sigrity::add librarySurfaceRoughness command has been introduced, which adds a surface roughness model to the project with user-specified parameters for accurate simulation results.

Clarity 3D Transient Solver now features a redesigned user interface built around a modern ribbon layout, offering a structured and streamlined way to access key features. By replacing the traditional drop-down menus, the new layout organizes commands and options into tabs and groups, ensuring frequently used commands are readily available and logically categorized.

The meshing algorithm now captures small geometric features, such as vias, even when their dimensions are smaller than the specified minimum mesh size. This helps maintain electrical continuity and avoid unintended open conditions. Meshing for coaxial structures has also been refined to provide better grid resolution for accurate mode extraction.

The material preprocessing workflow has been updated to convert 3D geometry to reusable 2D plane-based representations. This helps reduce repeated geometry queries, speeds up material assignment for large models, supports batch processing, and allows cached preprocessing results to be reused when the geometry remains unchanged.

The Optimality Intelligent System Explorer GUI has been significantly enhanced to provide greater flexibility, improved control, and a more intuitive user experience. Key additions include:

• New optimization parameter types, including discrete and array parameters, enabling more flexible design variable definitions.
• A new MidFunction parameter type for optimization studies.
• A Custom Objective Function that enables optimization objectives to be defined using Python scripts for advanced customization.
• New Design of Experiments (DOE) capabilities, including support for reference sample inclusion, maximum iteration runtime limits, and additional training data integration.

The look and feel of the GUI has also been refreshed across all analysis types, providing a cleaner layout and more intuitive user experience.

Graphics Processing Units (GPUs) can now be leveraged to boost simulation performance on Linux systems in Celsius Layout and Celsius 3D Workbench. This acceleration can significantly reduce the runtime for compute-intensive operations, such as matrix computations and numerical solving, by taking advantage of highly parallel processing capabilities. For local resource configurations, GPU configuration options are displayed by default in the Set up Computer Resources window on Linux systems. The updated setup process allows:

• GPU acceleration with a single click
• Configuration of GPU count
• Multiple GPU types

If no supported GPU hardware is detected, the configuration controls remain visible, but GPU selection is unavailable.

The Virtuoso-Celsius integration now uses Celsius 3DIC by default, providing improved performance for die-level and system-level thermal analysis workflows. This enhancement enables faster and more efficient analysis across a wide range of package and system designs. The flow also supports 3D heat soruces, allowing you to model complex thermal scenarios with greater accuracy.

The methods get_dev_control() and set_dev_control() have been added, allowing programmatic access to dev control keywords from Python scripts, to read and update current settings as needed.

The Sub Window Mode option has been added to the Window tab, allowing the use of a default tabbed view or tiled window layout. In Sub Window Mode, multiple views can be displayed simultaneously, windows can be resized and rearranged, and results can be compared side by side. New Minimize All, Tile All, and Cascade All commands make it easier to manage sub-windows within the workspace.

The options in the Healing group under the Modeler tab have been reorganized to provide easier access to commonly-used geometry repair, detection, and analysis tools. Frequently-used options are now available directly on the ribbon, while additional options are consolidated under the Advanced Healing menu, improving usability and workflow efficiency.

Celsius 3D Workbench now supports custom menus. The user interface can be extended and tailored through custom ribbon tabs, controls, and actions. Menu customizations are defined in a JSON configuration file loaded at startup. This capability enables you to tailor the Celsius 3D Workbench interface to support specific workflow requirements.

The following updates have been made to the context menu for the probe line and near-field plots:

• The Range Mode option has been enhanced to provide greater flexibility when defining color bar legend ranges. Legend labels are now automatically sized and shaped based on the selected range and display area, improving readability and minimizing label overlap.
• The default naming convention for objects in the Field Canvas, Slice, Clip, ProbeLine, ProbePoint, and Threshold objects has been updated. Newly-created objects now follow a consistent numbering sequence starting with 1.
• Common parameters can now be viewed and edited across multiple selected objects. With multiple objects selected, the Property panel displays only the properties shared by all selected objects. Properties with identical values are shown, while properties with different values are left blank. Common actions can be performed across the selected objects, such as modifying shared properties, showing or hiding objects and plots, and deleting objects. This simplifies object comparison and bulk editing of properties.

Celsius 3DIC supports assigning piecewise linear (PWL) waveform files to named areas and polygons in multiple-layer power XML files. With this enhancement, accurately model time-varying power dissipation by applying transient power profiles to specific regions during transient thermal simulations.

Celsius 3DIC now supports hierarchical power maps for power modeling. This feature allows a power map file to reference a hierarchy configuration file through the <POWERFILE> element. The hierarchy configuration file defines the top-level power map along with its associated hierarchical power maps. For each power map in the hierarchy, the configuration file specifies essential parameters, including the power map name, location coordinates, and rotation and flip settings; leading to efficient management of power distributions across the design hierarchy.

Celsius 3DIC now supports defining temperature-dependent power sources in power map files. In addition to static power definitions, leakage power values can be defined at multiple temperature points for individual power regions. During a simulation, Celsius applies the leakage power corresponding to the specified temperature in combination with the static power to determine the total power dissipation. This leads to accurate modeling of the temperature-dependent power behavior in thermal analysis.

The Properties tab of the IT Equipment Property Sheet now includes the Coolant Requirements section within Liquid Cooling Options, available when the Liquid Cooling option is enabled. The required coolant flow rate can be defined with Fixed or Curve definition types. The Results tab includes three new performance indicators under Liquid Cooling Performance for liquid-cooled (LC) IT equipment:

• Liquid Over Temperature: Indicates when coolant temperature exceeds defined thresholds.
• Liquid Undersupply: Indicates the difference between the required coolant flow rate and the coolant flow rate currently supplied to the equipment.
• Liquid Oversupply: Indicates excess coolant flow beyond what is required.

These enhancements provide greater visibility into liquid cooling performance and help specify coolant requirements, configure temperature limits, define flow rates, and evaluate overall cooling system utilization for liquid-cooled IT equipment.

The Results tab now includes a Cell Center Location section for the sensor objects. This enhancement displays the X, Y, and Z coordinates of the center of the simulation cell containing the sensor, making it easier to identify the sensor’s exact position within the model domain and correlate simulation results with their physical location.

The Grid Power Map Blocks Explicitly option is now available for objects that support power maps, such as Simplified Components, Subcomponents, and Heat Sources. When enabled, the grid is generated to match the geometry of the power map blocks more closely, using smaller grid cells where needed. This helps improve the accuracy of power map representation and analysis. The option is enabled by default.

The power map preview now shows X, Y, and Z axes anchored to the power map origin. The axes update in real-time when using the Rotate or Flip controls, making it easier to confirm correct map orientation before applying to a component.

You can now link 3D cooling pipes and ducts directly to Flow Network segments. A new Map to Flow Network dialog makes it easy to create and manage these mappings. Once linked, simulation results such as temperature and flow rate are visualized on your 3D geometry using a shared color legend, giving you a combined thermal and physical view of your cooling design.

A power map can now be directly imported onto a supported entity with the Model.importPowerMap() function in Python scripts. The function accepts the target entity (such as Heat Source), the power map type (for example, “CIM Format”), and the path to the power map file. This feature provides a scripting alternative to the power map import workflow available in the user interface and helps automate model setup tasks.

The Model.alignEntities() function can now be used in Python scripts to align one entity to another along the X, Y, and Z axes. This function supports four alignment options including Center, Min, Max, and None. This feature offers precise control over how entities are positioned relative to each other. A boolean return value confirms whether the alignment was applied successfully.

Python scripting can now be used to link entities in Celsius models with the addAttachment() function. Entities such as materials, sensors, and power devices can be attached to their targets without the GUI. The removeExisting parameter can be used to add to existing attachments or replace them entirely. An optional listName parameter targets a specific attachment list.

CAD models and components can now be exported as STEP (.step) files directly from the Python Scripting console with the new Model.exportMCAD() function. Specify the output file path, target entity, and whether to overwrite an existing file. To export the full model, pass Model.getRootEntity() as the entity. This feature provides greater flexibility to automate and integrate CAD exports into scripting workflows.

An on-demand licensing model has been introduced for Sigrity Aurora. With this change, Sigrity Aurora features are delivered through an on-demand packaging framework with an Allegro license.

The Topology Extraction Workflow supports the Advanced Cut capability, making it accessible across all license tiers for topology extraction, unlike other workflows that restrict this feature to higher tiers. It includes a Cut Design by Selected Net(s) check box in the Extraction tab of the Topology Extraction Parameters Setup dialog box, which is selected by default to enable cut functionality

Sigrity Aurora User Guide has been enhanced to include step-by-step instructions and configuration details for the following analysis workflows: Virtual Proto, Design Setup, Impedance, Reflection, Return Path, Power Inductance, and Thermal Workflows.

You can now create an HTML report that records the simulation results, including visions and numerical results. By selecting the Generate Report button available in the workflow panel, you can create a detailed HTML report of the simulation results.

All analysis workflows now support advanced design cutting capability where you can choose to cut the design by selected nets or shape to significantly improve the overall simulation time for large designs. In addition, the Preview Cutting Polygon option provides a preview of the cut outline on the canvas that can be adjusted according to your requirements before running the analysis. This feature is available with Allegro X Venture and Allegro Enterprise licenses.

The simulation tab in the IR Drop Analysis parameters setup dialog box includes new options to offer improved flexibility, speed, and accuracy when performing IR Drop Analysis on the design. This includes ambient temperature definition, settings for ground and pads, and an accuracy mode.

Until this release, clicking Save as ECSet File in the Workflow: Constraint Setup panel saved the ECSet files as text files with the .top extension. This did not preserve wiring information. Starting with this release, ECSet files are saved as single-entity database files with a .topx extension. This new format preserves all data related to the ECSet, including the model, database files, placement data, constraints, and more. A valid ECSet file in this format can be seamlessly imported into the layout and schematic editors.

The Margin field is renamed to Tolerance (for Coord match) in MCP Auto Connection dialog box, and the number of matched pins is now displayed. The Pin Mapping Report dialog box now includes clear matched/unmatched section labels.

The Conductive Mask Layer Options and Dielectric Mask Layer Options that were previously available under the Rigid-Flex tab of the Translators form have now been separately organized under a new tab called Mask Layers.

The Net Manager dialog box provides an additional display mode, Show Diff Pairs, to view all the differential net pairs present in a design. When you choose Show Diff Pairs as the display mode, the net manager adds a new column, Diff Pair, to the table that indicates all the differential net pairs.

An option, Multiple Frequency, is added to the Package Setup -> Package Type pane. This option is enabled for both net and pin-based simulations.

The Port Reference settings in the Simulation Setup -> Simulation Type pane are now preserved when changing component selections during simulation setup. This usability enhancement saves time and prevents the need to reconfigure settings when adding or removing components.

An option to create derated capacitor models has been added in the Capacitor Libraries section.

The setting, Passivity and causality enforcement by BroadbandSPICE, is added to improve model passivity and causality performance during DC‑referenced simulations. This setting is available in Simulation (Advanced) – Field Domain under PowerDC Option.

PowerTree now detects mismatches between the starting component settings and the layout netlist and lets you update the power tree using the Dynamically Update Starting Component feature available in Starting Components form.

The core solvers of SPEEDEM have been optimized to deliver substantial speedups in multi-CPU environments, directly benefiting complex hybrid solver simulations as follows: FDTD Solver runs up to 3x faster than the previous release. High-Performance Computing (HPC) option for circuit solver runs approximately 2x faster than the last release. To enable this feature, select the Enable HPC for circuit solver option in the HPC for Level-3 Simulation form.

The multithreaded circuit solver is now more robust. For designs that previously encountered convergence or stability issues, selecting the Enable Multi-threaded Matrix Solver option with the Always option in the HPC for Level-3 Simulation form can now resolve certain failure cases.

The Port Reference settings in the Simulation Setup -> Simulation Type pane are now preserved when changing component selections during simulation setup. This usability enhancement saves time and prevents the need to reconfigure settings when adding or removing components.

The vertical port creation method has been redesigned to reduce manual steps, improve usability, and provide consistent automation for edge‑ and edge‑node–based designs. Two new context-menu options, Create Vertical Lump Port – Single Side and Create Vertical Lump Port – Double Side , are now available to hook the nodes and edge nodes.

A property, Finite Slice, has been added to the Slice operation. This property lets you view the field results on a specific area of the geometry without cutting across the entire geometry.

In Clarity 3D Layout, a new option, Sync Up View, has been added that lets you view the 2D geometry and the corresponding near field results simultaneously. The move and zoom in/out operations in either GUI are automatically reflected in the other, keeping both views synchronized.

In Clarity 3D Workbench, a new option, Average SAR, has been added that calculates the average rate at which radiofrequency (RF) energy is absorbed by the human tissue, measured in watts per kilogram (W/kg). This lets you quickly evaluate RF exposure levels with greater accuracy

The EMC antenna models are added to Component Library that helps you achieve accurate and realistic EMC simulation results and enables you to detect issues quickly.

The Filter text box has been added to the Preview/Save Field dialog box that lets you quickly locate any frequency in the list by specifying the desired value into the Filter text box. BC/Port Visualization Mode (New) The BC/Port option has been added to the View tab that helps you quickly identify model faces where boundary conditions or port excitations have been applied.

The Clear Results option has been added to the Results tab that lets you quickly remove the simulation-generated result files from your local machine. This helps free up storage space and maintain optimal system performance.

Celsius 3DIC now supports reduced-order models (ROMs) of external cooling devices, particularly liquid-cooled cold plates. This reusable reduced-order modeling approach enables rapid thermal analysis at dynamic inlet temperatures, flow rates, and power levels, achieving computational speeds several orders of magnitude faster than conventional CFD while preserving full 3DIC layout resolution. This enables tightly coupled multi-physics co simulation across thermal, mechanical, and fluid domains with spatially resolved temperatures across the full 3DIC stack. The result is dramatically enhanced simulation efficiency that eliminates the need for repetitive, time-consuming CFD runs while maintaining exceptional accuracy for advanced thermal management

A new button, Add to Selected, is available in the Create Pin Pair – Relative Propagation Delay window. Clicking this button adds a pin pair selected from the left table to an existing match group in the Pin Pairs table, creating a new entry where the selected match group’s name is retained. The cells under the Name column of the Pin Pairs table are editable.

The new Violation panel lets you view the error, warning, and information messages related to a topology extracted from Allegro Constraint Manager into the Constraint Setup workflow in Topology Workbench for signal integrity exploration. To open this panel, select View > Violation Window.

The X, Y, and Z coordinates of the origin can now be adjusted with sliders in the Slice or Clip Property panel, making positioning of working planes faster and more intuitive.

Python-based recording is also available as part of Clarity post-processing operations for both near and far fields. This accelerates complex operations and saves time.

The state file (.gst) now retains 2D and 3D far-field configurations and 2D plot settings, including probe line and probe point.

When importing a Celsius Interchange Model file, parts can now be easily organized by layer information with the new Group By > Geometry Layer option. This makes complex models easier to manage.

When run on Linux, the Open Project dialog now initializes the directory to that from which the tool is launched. This launch directory appears in the Look In dropdown, making navigation more efficient.

Use the Zoom To option to instantly center the view on any point in the design by entering the exact X, Y, and Z coordinates rather than manually panning and zooming through complex layouts. This feature can be accessed by selecting Zoom To in the Find group on the Tools tab.

The 3D modeler canvas can now be panned effortlessly with keyboard controls. Use the arrow keys to adjust the view left, right, up, or down and reposition the design without using the mouse.

Power map files can now be exported in the XML format, making it easier to share, integrate, and process data across different tools and workflows. When creating 2D and 3D heat sources, use the Export Powermap button to save the current power distribution in XML format.