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:
Jun. 29, 1999
Filed:
Nov. 04, 1997
Masayuki Naganuma, Kawasaki, JP;
Tetsu Tanizawa, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A method of placing and routing elements of a semiconductor integrated circuit picks out a signal net, a driver of the signal net, and load cells driven by the driver among the elements of the integrated circuit, places the driver at a first position, defines a first range based on the first position, determines a second position in the first range, defines a second range based on the second position, and collectively places the load cells of a predetermined number in the second range. Namely, the method deals with a signal net in the integrated circuit, a driver of the net, and load cells driven by the driver. The method sets conditions on the signal net, driver, and load cells, when placing and routing the elements of the integrated circuit, to thereby reduce skew (skew time), wiring overhead, and time delay in the integrated circuit and speedily and easily place and route the elements.