Computer-aided design and analysis of circuits and semiconductor – Nanotechnology related integrated circuit design
Reexamination Certificate
2006-12-05
2009-06-16
Dinh, Paul (Department: 2825)
Computer-aided design and analysis of circuits and semiconductor
Nanotechnology related integrated circuit design
C716S030000, C716S030000, C716S030000, C716S030000, C703S013000, C703S014000
Reexamination Certificate
active
07549135
ABSTRACT:
A design methodology is disclosed for optimizing guard ring design by optimizing the guard ring to power supply path resistance value between physical and/or virtual injection sources in a CMOS circuit and the corresponding power supply. By comparing the calculated guard ring to power supply path resistance value to resistance criteria derived from specifications, elements that need further redesign are identified. Repeated redesign with several redesign options eventually lead to an optimized guard ring structure that provides area-efficient and sufficient latchup protection for the CMOS circuit.
REFERENCES:
patent: 5796638 (1998-08-01), Kang et al.
patent: 6157530 (2000-12-01), Pequignot et al.
patent: 6725439 (2004-04-01), Homsinger et al.
patent: 2006/0092592 (2006-05-01), Huang
patent: 2007/0008667 (2007-01-01), Steinhoff
patent: 2008/0122473 (2008-05-01), Lien et al.
Ker, Ming-Dou, et al., “Automatic Methodology for Placing the Guard Rings into Chip Layout to Prevent Latchup in CMOS IC's”, IEDM Tech. Dig., 2001, pp. 113-116.
Harame, D. L., et al., “Design Automation Methodology and RF/Analog Modeling for RF CMOS and SiGe BiCMOS Technologies”, IBM J. Res. & Dev., vol. 47, No. 2/3, Mar./May 2003.
Chapman Phillip F.
Collins David S.
Voldman Steven H.
Dinh Paul
Doan Nghia M
Harding, Esq. W. Riyon
International Business Machines - Corporation
Scully , Scott, Murphy & Presser, P.C.
LandOfFree
Design methodology of guard ring design resistance... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Design methodology of guard ring design resistance..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Design methodology of guard ring design resistance... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4075178