Hi Mukti, you might look at SEMI Document 4268 (SEMI MF723-1105) "Practice for conversion between resistivity and dopant or carrier density for Boron-doped, Phosphorus-doped and Arsenic-doped Silicon". We usually use these formula to calculate sheet resistivity from ECV-measured doping profiles, and the results really prove to be very reliable over a very high doping range, also for very high doping levels. Best regards, Thomas _________________________________________________________ mailto:thomas.wolff@wepcontrol.com . Tel +49-7723-9197-27 WEP Bregstrasse 90 D-78120 Furtwangen http://www.wepcontrol.com -----Original Message----- From: Rana, Mukti M [mailto:mrana@uta.edu] Sent: Thursday, September 27, 2007 6:57 AM To: mems-talk@memsnet.org Subject: [mems-talk] Poly Silicon Resistivity Hello, Can anyone suggest me the variation of resistivity of polysilicon with doping concentrations? Reference of any paper or article will be appreciated. Thank you. Mukti M Rana