Category Archives: Open Source

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

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.


An interesting project from the IuE Summer of Code 2014 is a collection of 3D CAD models. On the CAD models page are examples of these devices.

  • MOSFET and Single-Gate
  • Double-Gate
  • Tri Gate
  • All-Around-Gate
  • FlexFET
  • Special Gate-Form Devices

Using the FreeCAD open source CAD modeling software. The student created these models from examples in the literature. There are also tutorials at the bottom of the page for building a Double-Gate MOSFET and Tri-Gate devices.

The NanoTCAD ViDES team has announced their new website,

From their announcement:

The website is intended to be a useful tool in order to link to all the recent publications concerned with Two-dimensional materials from the main journals in the field, i.e., (up to now) Physical Review Letters, Physical Review B, Applied Physics Letters, IEEE Transaction on Electron Devices, IEEE Electron Device Letters, IEEE Nanotechnology, Proceedings of IEEE, Scientific Reports, Nature Nanotechnology, ACS NANO and Nano Letters.

NanoTCAD ViDES Contract Position

The NanoTCAD ViDES developers Team is looking for a GUI developer. From their mailing list:

The activity consists in the development of a GUI for the NanoTCAD ViDES code.
Potential candidates must have good programming skills (C, Fortran and Python).
Good background in device physics can represent an added value.
Work is estimated to be completed in 2 month full time equivalent of a skilled programmer.
The activity can be performed remotely, with interaction through online collaboration tools.

More information is available from

Fujitsu Simulates Graphene Device Using Open Source Tool

Fujitsu announced the simulation of a 3030 Atom Nano device here on January 14th, 2013. The simulation took 20 hours on their supercomputer to simulate the electrical properties of graphene and an insulating layer, using OpenMX Material Explorer.

Even more interesting is the news that OpenMX is an open source tool available from under the terms of the GPL.

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

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: They also have a listing of future events concerning compact modeling.

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: