Title :
Layout dependence of CMOS latchup
Author :
Menozzi, Roberto ; Selmi, Luca ; Sangiorgi, Enrico ; Crisenza, Giuseppe ; Cavioni, Tiziana ; Riccò, Bruno
Author_Institution :
Dept. of Electron., Bologna Univ., Italy
fDate :
11/1/1988 12:00:00 AM
Abstract :
This paper presents a detailed analysis of CMOS latchup dependencies on layout and geometrical dimensions. To this purpose test structures have been fabricated featuring butted contacts and guard rings with different values of critical distances. The devices have been experimentally characterized in the triggering and sustaining regime, and numerical simulations have been extensively used to interpret the experimental data. It is shown that great care should be taken in designing protection structures since larger areas do not always lead to enhanced latchup immunity
Keywords :
CMOS integrated circuits; integrated circuit technology; integrated circuit testing; CMOS latchup; butted contacts; geometrical dimensions; guard rings; latchup immunity; layout; numerical simulations; protection structures; sustaining regime; test structures; triggering regime; Bipolar transistors; CMOS integrated circuits; CMOS technology; Epitaxial layers; Equivalent circuits; Lead compounds; Numerical simulation; Protection; Substrates; Testing;
Journal_Title :
Electron Devices, IEEE Transactions on
