This is a simulation of a single conductor above a ground plane. The simulation window is actually much larger to ensure proper boundary conditions.
Author Archives: Juan
Solving for magnetic fields in DEVSIM.
This past week I’ve been experimenting with solving magnetic field problems. Here is my first result. Two wires are in the center of the figure with current flowing in opposite directions. The solution variable is the magnetic vector potential, A, and is shown in the color gradient. The arrows are the magnetic field, B, which is post processed from the solution. In turns out this post processing is similar to finding the vector impedance field used in noise analysis.
Sensitivity Analysis White Paper
A new white paper concerning sensitivity analysis is available here:
TCAD Sensitivity Analysis for Device Optimization
New White Paper
I have uploaded a white paper to the website. It discusses some of the concepts behind DEVSIM.
Symbolic Model Evaluation for TCAD Device Simulation
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.
Announcing TCAD Central
I’ve started a new website at https://www.tcadcentral.com. It is a wiki dedicated to technology computer aided-design. Please check it out, and let me know if you have suggestions, or would like to participate.
Are you LinkedIn?
Linked in is a great tool to reconnect with former colleagues. I recommend you all check it out. It is interesting who you might run into in their groups. For example, check out the TCAD and Device modeling and simulation groups.
Happy New Years
2008 was a fun year. I made a lot of progress with the simulator, adding 2d and 3d device simulation.
Hoping to share more with all of you soon.
3d MOSFET
Here is DEVSIM’s first 3d simulation of a MOS transistor. The coloring is the potential at zero bias.
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.