US Patent No. 9,331,066

METHOD AND COMPUTER-READABLE MEDIUM FOR DETECTING PARASITIC TRANSISTORS BY UTILIZING EQUIVALENT CIRCUIT AND THRESHOLD DISTANCE


Patent No. 9,331,066
Issue Date May 03, 2016
Title Method And Computer-readable Medium For Detecting Parasitic Transistors By Utilizing Equivalent Circuit And Threshold Distance
Inventorship Ming-Huei Tsai, Miaoli County (TW)
Yao-Jen Hsieh, Taipei (TW)
Kai-Ming Liu, Hsinchu (TW)
Assignee TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD., Hsinchu (TW)

Claim of US Patent No. 9,331,066

1. A method of detecting a parasitic transistor, the method comprising:
using a computer to convert a layout of a selected area to an equivalent circuit having a plurality of diodes;
tracing signals coupled to the diodes to determine at least one diode pair from the diodes; and
filtering the at least one diode pair in accordance with a threshold distance to determine whether at least one parasitic
transistor is obtained;

wherein each diode pair comprises two diodes coupled, and has a common terminal and two I/O terminals, wherein the two I/O
terminals are coupled to different I/O signals, and the at least one diode pair is filtered by comparing a minimum distance
between the two I/O terminals of the diode pair and the threshold distance, and if the minimum distance is smaller than the
threshold distance, the parasitic transistor comprising the diode pair is obtained.