Global TCAD Solutions

Predictions based on Physics

Boosting Productivity with GTS Framework

Work flow from layout-based structure generation to device to transient 3D mixed-mode circuit simulation to pulse-propagation plot – all in less than one hour

Setting up new simulations has often turned out to be quite tedious in conventional tools, involving editing configuration files and node lists.

With its intuitive user interface and integrated work flow functions, GTS Framework is the most efficent-to-use TCAD framework available today, allowing users to concentrate on the task rather than the tools. See how GTS Framework provides unprecedented efficiency in everyday use.

From Layout to Circuit Simulation – in less than one Hour

Starting from device layout, it is straight-forward to set up transient mixed-mode circuit simulation, for instance of an inverter chain or an SRAM cell.

1. Structure Generation

Create a full 3D device model directly from the layout (GDSII mask file) using GTS layout-based structure generation. Just choose the mask file and technology definition, and GTS Framework will assist you with:

Layout-based structure generation
Layout and 3D device model (SRAM cell)
  • Automatic extraction of device geometry
  • Automatic creation of doping regions for wells, S/D, and Vth implants
  • Automatic meshing including channel and doping refinement
  • Optional inclusion of interconnect layers

See GTS Structure for other ways of creating/editing devices.

For more details, please refer to the tutorials Device Editor and Layout-Based Structure Generation.

2. Simulation Settings – Easy As Can Be

Based on device structure and your model selection (Minimos-NT offers a comprehensive set for a wide range of applications), GTS Framework auto-generates simulator settings for you. Benefit from the hierarchical user interface:

Hierarchical user interface: Basic setup / tree / IPD file
  • Basic setup in an easy-to-use graphical interface
  • Detailed setup in a convenient tree interface
    showing default values, physical units, and item descriptions
  • Scripting and human-readable configuration files
    in IPD format with section inheritance, physical units

This 3-layer concept combines the efficiency of modern graphical interfaces with the power and scripting capabilities of text-based configuration files. File management is also included.

For details, please see the Device Simulation tutorial.

3. Comfortable Circuit Environment

For mixed-mode simulation, draw the circuit around the distributed device(s), and set parameter values. GTS Framework assists you with:

Graphical circuit editor for mixed-mode simulation (embed distributed devices in a circuit of compact bsim models)
Mixed-mode circuit editor (Inverter)
  • Graphical circuit editor, integration of one or more distributed devices
  • Automatic creation of the net-list while you connect the device ports in the circuit
  • Direct import of various spice models

Mixed-mode simulation turns out as easy as device or circuit simulation — find out more in Mixed-Mode Simulation I and Mixed-Mode Simulation II.

Ready To Run!

Above setup steps should have taken less than one hour. You are now ready to run the simulation – results will be shown instantly.

Simulation runtime of a 6T-SRAM SEU simulation (total time < 4 hrs on a single core machine)
Runtime of a 6T SRAM SEU simulation (total time < 4 hrs on single core)
3D simulation results of a 3D SRAM including interconnect layer
3D simulation results of SRAM with interconnect layer

Minimos-NT has highly efficient numerical multi-core solvers; however, simulation time largely depends on data complexity and hardware. For example, using the highly efficient iterative linear solver (single core), a single event transient (SET) simulation of an inverter chain takes less than one hour. A single event upset (SEU) simulation on an SRAM (approx 250k mesh nodes) takes less than 4 hours. The butterfly curve for static noise margin can be estimated even faster. (You will notice this is similar or even faster than other products available on the market.)

Analyzing Results

Depending on your needs, you can do further analyses — GTS Framework has the tools for you:

  • Visualization of quantities in 2D/3D device view (electrostatic potential, current density, etc.)
  • Plotting electric output (current, node-voltages, etc.)
  • Post-processing (Vth, DIBL, sub-threshold slope, etc.)
  • Statistical data analysis (mean value, standard deviation, etc)

 

Conclusion

Modern user interfaces can bring significant gain in productivity, provided that flexibility and power of textual interfaces is maintained. GTS Framework's hierarchical interface, comprehensive set of templates, and the integrated work flow functions provide unprecedented ease of use, to considerably increase design productivity.

Further Information

Please have a look at our examples gallery.
You are welcome to go through our introductory tutorials and application tutorials, both containing step-by-step guides for selected work flows.