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. 27, 2004
Filed:
May. 04, 2001
Applicant:
Inventor:
Toshiki Kanamoto, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/750 ; G06F 9/45 ;
U.S. Cl.
CPC ...
G06F 1/750 ; G06F 9/45 ;
Abstract
A semiconductor circuit extraction apparatus: detects the uppermost wiring layer of a cell; carries out virtual wiring conductor routing on all tracks of a cell-top wiring layer directly overlying the uppermost wiring layer of the cell; extracts parasitic capacitances of all the wiring conductors including those virtually routed; and calculates the delay time of placement/routing data in accordance with the extracted parasitic capacitances to provide highly accurate delay information library data.