Category Archives: TCAD

Writing documentation

Nothing more fun than writing documentation. Of course, no one can use your software if you don’t provide instructions. Contrary to what many software developers believe, providing an example is not the same as providing documentation.

gmsh for 2d mosfet

Here is a 2d mosfet meshed with Gmsh and loaded into DEVSIM. Note that this is the same structure and doping which was originally shown here in my first post.

It just looks a lot better having used a nicer meshing tool than the one built into the software.

As before, the red areas are the electron concentration.

First 3d result

3d diode

3d diode

Turns out Gmsh was an excellent choice for a mesher.  It is a very usable tool for creating structures  Almost reminds me of mdraw.

The result is a 3d (quasi-1d) diode structure.  The spot in the middle is the magnitude of the electric field.  Visualization is done in Paraview.

3d simulation

Mulling over the importance of 3d simulation.  I’m by no means a meshing expert.  Looking for third party tools to create tetrahedral meshes.  As of now gmsh seems to look promising.

What is DEVSIM?

DEVSIM is the name of a project I’ve created to write my own semiconductor device simulator. It is written from scratch and is based on my experience writing and using TCAD software.

Even though many of the principles behind such a software are decades old, I feel there is a market. This is evidenced by a whole lot of TCAD software startups popping up on the web for the past few years.

So now I am trying to find my niche in this market. In future postings I will share more about some novel aspects to my approach.

Anyway, feel free to stop on by and say hello.  I leave you with a baby picture from the simulator.

2D MOSFET

2D MOSFET

Ciao,

Juan