The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 1986
Filed:
Jun. 27, 1983
James W Davis, Boca Raton, FL (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A master slice designed for storage in sub-stock and for use in producing very large scale integrated circuits in an automated placement and wiring environment is described that is made from a semiconductor electronic quality wafer and the like, the wafer having a 'brickwall' set of active elements such as bipolar transistors together with associated passive elements arranged in a master slice image. The master slice is personalized using optimization techniques including among other steps, the steps of modeling, developing and validating primitive logic diagrams, determining element placement by a Monte Carlo simulated annealing method, selecting hierarchical wiring by a maze runner algorithm and further validation.