Dear BSIM3 users,

We are releasing the code of BSIM3v3.1 today. In this release,  with 
the approval of Standard Model Council, we have addressed mainly the 
code quality improvement rather than model equation change. 

Since the release of BSIM3v3.0 in Oct. of 1995 , we have received a 
lot of feedback and inputs from many users at different companies. We
would like to particularly thank Minchie Jeng at Cadence, Pratheep 
Balasingam, Bill Scott and Kim Hailey at Metasoftware, Keith Green, 
Tom  Vrotsos, and Britt Brooks at TI, David Newmark and Bhaskar 
Gadepally at Motorola, Zhihong Liu at BTA,  Chris Lyons at Analog 
Devices, Mishel Matloubian and Sally Liu at Rockwell, Seamus Power at 
Silvaco (now at Analog Devices), and Rosana M. Perez at HP for their 
 valuable comments and suggestions. We have considered all the 
comments carefully and  acted on nearly all of them  in this release.

Many improvements have been made in the BSIM3v3.1 code relative to 
the BSIM3v3.0 code released in Oct. of 1995:
 
(1) Code improvements to avoid any model discontinuity that may be 
caused by bad values of certain parameters.

(2) Code changes to avoid any algebraic problems such as divide by 
zero or sqrt root domain.

(3) Fixes of the bugs.

(4) Addition of  a new routine to check certain parameters for proper 
value ranges.

(5) Addition of  options for using different noise models.

(6)  Modification of  the S/B and D/B diode model.

(7) Add capmod=0 for BSIM-like capacitance model.  

(8) Code clean-up

The source codes, description of the code changes and a updated bug 
list with the names and institutions of the bug reporters and fix 
providers have been put on the FTP site. You can  get  them by FTP 
according to the instruction enclosed in  this letter or by accessing
our WWW site to download them: http://rely.eecs.berkeley.edu:8080 
/bsim3www/bsim3.html. The updated manual will also be put on the FTP 
site.

Thanks again for your support of and interest in the BSIM modeling 
research. As always,  we hope you will send  us your suggestions and 
comments continually after this release so that we can  develop more 
advanced BSIM model for your use. 

Before closing, I'd like to acknowledge that the hard and good work 
of  Dr. Yuhua Cheng and the expert assistance of Dr. Min-Chie Jeng 
made this release possible, and  Dr. Keith Green, chair of the 
Technical Issues Committee of Standard Model Council, provided much 
appreciated counseling and coordination of user inputs.

Best Regards,

Chenming Hu
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                     INSTRUCTIONS of FTP BSIM3V3 FILES:


  1.  ftp rely.eecs.berkeley.edu
         or
      ftp 128.32.156.10

  2. login in as "anonymous"
  3. Enter <your email address> as the password.
  4. Type "binary"
  5. Change directory to /pub
  6. Use "get" to obtain the files.

subscribing to mailing list: bsim3@bsim.eecs.berkeley.edu


World-Wide Web home page has been created at

http://rely.eecs.berkeley.edu:8080/bsim3www/bsim3.html

It contains the files available from the BSIM3 anonymous ftp site as 
well as official BSIM3 news (which will also be posted to the BSIM3 
mailing list).