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:
Jan. 10, 2006
Filed:
Jun. 13, 2003
Applicants:
Tadashi Konno, Kawasaki, JP;
Masahiro Sano, Kawasaki, JP;
Makoto Saito, Kawasaki, JP;
Inventors:
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 17/50 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of forming a tree structure type circuit includes the steps of dividing a division target region of LSI into a plurality of regions, placing constituent elements as distribution targets in the regions, forming a tree, conducting schematic routing, and conducting timing improvement while considering a clock skew. These processings are repeated by a preset number of times. If the repetition number reaches a specified number, the constituent elements and an added buffer or the like are subjected to detailed placement, and automatic routing is conducted.