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:
Apr. 23, 2002
Filed:
Feb. 10, 1999
Atsushi Sakurai, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The present invention resolves the problems of conventional top down hierarchical layout design methods by including the following in a top down hierarchical layout design method using soft block, in addition to determining the arrangement of block pin (called “soft pin”) in soft block, generating second block pin having the same potential as existing block pin; and moving block pin position to position opposite the block pin to be connected. The layout tool program of the present invention is therefore provided the functions of moving and generating soft pin, whereby the top level signal wiring in the region among the blocks is optimized, delay time is minimized, and the use of wasteful wiring channel is avoided for any combination of blocks.