Equipment

Software

Parameter extraction with OPTIMOD

The program system OPTIMOD has a central place in design and data flow for technological oriented modeling of DAnalyse. This program is used for the purpose of parameter extraction, which is at most a kind of data acquisition and transformation.

1. All original, basic SPICE - models with regard of terminal resistance in extraction step
   • Diode (optional Schottky- and ZENER-Extension)
   • JFET
   • GaAs-FET (in progress)
   • BJT (optional with quasi saturation)
   • MEXTRAM, VBIC95 (in progress)
   • MOS level 1-3
   • MOS level 6 and 28 (HSPICE)
   • Philips level 9
   • BSIM - Model (BSIM2, BSIM3v2, BSIM3v3)
2. Universal interface allows the implementation of other model descriptions
3. Algorithms for optimization:
   • Simulated annealing
   • Levenberg-Marquardt
   • Modified GN-QN Verfahren
4. Extension to AC - extraction with s - parameter measurements
5. Text IN/OUT Format
   • Measurement data direct from equipment (without manual corrections)
   • Protocol in adjustable size
6. Graphic interface

Following figures are showing results of parameter extraction with OPTIMOD. Measurement data are compared with model curves before and after extraction step.

The first two plots depict the fit of a SPICE level3 - Model for n-channel MOS transistor in 1.2um CMOS technology. The extraction was done on a set of 8 different width/length combinations and 120 measurement points each including bulk control.

The next figure contents the result of parameter extraction for the SPICE Gummel - Poon model of a BJT in a full implanted technology related to measured data. The average error for this wide working range is smaller than 9%.