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:
Feb. 19, 2013
Filed:
Dec. 23, 2010
Keiichirou Kondou, Kanagawa, JP;
Hiroyuki Tsuchiya, Kanagawa, JP;
Keiichirou Kondou, Kanagawa, JP;
Hiroyuki Tsuchiya, Kanagawa, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
A design method of a semiconductor integrated circuit sets an area having apices of opposing corners of a position of a start point logic cell and a position of an end point logic cell to a repeater search area, adds free area information to the repeater search area, sets a drive boundary in the repeater search area based on a drive ability of the start point logic cell, searches a repeater candidate that can be arranged in an area of the drive boundary based on the free area information, calculates a delay time from the start point logic cell to the end point logic cell based on delay time information and a coordinate of the repeater candidate that is searched, and determines a repeater arranged between the start point logic cell and the end point logic cell from the repeater candidate based on the delay time that is calculated.