Category Archives: Announce

Semiconductor Device Simulation Using DEVSIM

Semiconductor Device Simulation Using DEVSIM is now available from our site.

Abstract:
DEVSIM is a technology computer aided design (TCAD) simulation software. It is released under an open source license. The software solves user defined partial differential equations (PDEs) on 1D, 2D, and 3D meshes. It is implemented in C++ using custom code and a collection of open source libraries. The Python scripting interface enables users to setup and control their simulations.

In this chapter, we present an overview of the tool. This is followed with a bipolar junction transistor (BJT) design and characterization example. A collection of open source tools were used to create a simulation mesh, and visualize results

The Python scripts for simulation are here:
https://github.com/devsim/devsim_bjt_example

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.

3D TCAD FINFET Models

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.

2dmatter.com

The NanoTCAD ViDES team has announced their new website, http://www.2dmatter.com.

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.

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