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. 15, 2000
Filed:
Dec. 09, 1996
Applicant:
Inventor:
Shigehisa Yamamoto, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
364488 ; 364489 ; 364490 ; 364491 ; 382145 ;
Abstract
An electric work station calculates an output load of a selected cell based on information from at least one of a design cell information library, a logic circuit information library and a layout information library. The work station further calculates a hot carrier dependent lifetime of a transistor in the cell by using the computed output load and information from a reliability information library, and verifies reliability of the cell by comparing the calculated lifetime with a reference value.