Category Archives: EDA

DEVSIM under new open source license

The DEVSIM source code is now released under the Apache License, Version 2.0. It was previously under the LGPL 3.0. The license change is intended to promote adoption of the software and attract new contributors. A brief synopsis of the license is here.

The spirit of the Apache License is also more in line with the license terms packages that DEVSIM relies upon. More information about DEVSIM is available from https://www.devsim.org.

If you have any announcements concerning TCAD companies, modeling, or simulation, please send us a note via the contact form.

Verilog A Best Practices Paper

The IEEE Journal of the Electron Devices Society has published an article titled:
Best Practices for Compact Modeling in Verilog-A

The article is freely available for download via open access. It covers how to avoid many of the pitfalls in using Verilog-A compact modeling. It is unclear if this might be related to the effort described in our previous post.

If you have any announcements concerning TCAD companies, modeling, or simulation, please send us a note via the contact form.

VALint: the NEEDS Verilog-A Checker

An interesting project on nanoHUB is a Verilog-A checker, VALint.

From their abstract

VALint is the NEEDS created, automatic Verilog-A code checker. Its purpose is to check the quality of the Verilog-A code and provide the author feedback if bad practices, common mistakes, pitfalls, or inefficiencies are found.

It is currently in beta. We hope that this project is successful as Verilog-A is the language for sharing compact models between researchers and circuit simulator software companies. The project is open source and can be downloaded. It can also be launched on nanoHUB on their online simulation platform.

If you have any announcements concerning TCAD companies, modeling, or simulation, please send us a note via the contact form.

TCAD Central

One of the other sites I manage is TCAD Central – https://www.tcadcentral.com. It is a resource concerning TCAD and semiconductor device simulation. Some of the content is no longer current. Please let me know if you have any updates or news in this blog or on the TCAD Central site.

If you have any announcements concerning TCAD companies, modeling, or simulation, please send us a note via the contact form.

New Genius Device Simulator Release

There was a new release of the Genius Device Simulator on March 22, 2014 as part of Cogenda’s Visual TCAD suite of tools. From their website:

http://cogenda.com/article/Release-Notes-VisualTCAD

  • Density-Gradient Model for inversion layer in MOSFET’s
  • Schur-complement numerical solver for Device Circuit Simulation
  • Improved impact-ionization model
  • Self-consistent gate tunneling current mode
  • Mobility and other material property models which matches with another popular TCAD tool
  • 3D analysis of satellite internal-charging problem.
  • minor features and bug fixes

This is their first release of a public update in over a year. I’m looking forward to their update of their open source version of their project at http://github.com/cogenda/Genius-TCAD-Open

If you have any announcements concerning TCAD companies, modeling, or simulation, please send us a note via the contact form.

TCAD Software Job

Sandia National Labs is looking for a TCAD software engineer who is a US citizen and is able to get a security clearance.  From their description:

We have an immediate technical staff opening for a semiconductor device modeling software developer with expertise in scientific programming for high performance computing.  The position emphasizes algorithm design and enhancement to extend the capabilities and increase the efficiency of our large scale, parallel, drift-diffusion solver, which is a C++/object oriented program.  The successful candidate will be part of a team of computational scientists and semiconductor device physicists.  Additionally, the position requires extensive interaction with experimental and theoretical physicists and research engineers working on characterizing radiation effects in microelectronic devices and the resulting changes to circuit performance.

I was aware that they had a software named Charon, which leveraged a commercial tool. It looks like they may be developing their own replacement. A quick google search revealed a mailing list for their git archives of the tool. It appears the tool has been in development at least since January 2012.

If you have any announcements concerning TCAD companies, modeling, or simulation, please send us a note via the contact form.

MOS-AK GSA December 2013

Presentations from the 6th International MOS-AK/GSA Workshop on Dec.11, 2013 in Washington DC are now available from http://www.mos-ak.org/washington_dc_2013/.

It was organized to discuss SPICE/compact modeling and its standardization. There are presentations about the the various compact modeling initiatives going on in industry and academia.

You can keep track of MOS-AK’s work by signing up for their mailing list at: http://www.mos-ak.org/. They also have a listing of future events concerning compact modeling.

If you have any announcements concerning TCAD companies, modeling, or simulation, please send us a note via the contact form.

Aestimo version 0.9

Sefer Bora Lişesivdin announced the release of Aestimo GPL 1D Schrödinger-Poisson solver last month. From his announcement on LinkedIn:

Aestimo Team is proud to release the version 0.9 of Aestimo 1D Self-consistent Schrödinger-Poisson Solver. This version includes many bugfixes, speed improvements, cython code additions, rewritten VBMAT-V part to use numpy better, merging conduction and valance band calculations and more. Code is heavily modified and stabilized.

The software is available for download from: https://bitbucket.org/sblisesivdin/aestimo/downloads.

If you have any announcements concerning TCAD companies, modeling, or simulation, please send us a note via the contact form.