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. 25, 1989
Filed:
Feb. 12, 1988
Masayuki Naganuma, Kawasaki, JP;
Yoshiyuki Suehiro, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A master slice type integrated circuit for providing various circuits by altering the routing of interconnections comprises a plurality of input/output cells arranged in a peripheral region on a semiconductor chip, the input/output cells each comprising pads for connection with an external circuit, input wiring regions each for accommodating input interconnecting lines transmitting input signals applied to the pads, and output circuit regions each for forming output buffers; and a plurality of basic cells being arranged in a region on the chip surrounded by the arrangement of the input/output cells. Two adjacent input/output cells are paired with each other. The output circuit regions of the pair of the input/output cells are arranged in the vicinity of a boundary of the pair. The input wiring regions of the pair are arranged in the vicinity of boundaries with respect to other pairs.