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:
Jan. 28, 1992
Filed:
Aug. 09, 1989
Takeshi Kajimoto, Nishitama, JP;
Mitsuteru Kobayashi, Hannou, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A plurality of unit integrated circuits mounted on a large-scale integrated circuit device, for example, a wafer scale memory, are each provided with a bypass circuit which selectively shorts input and output nodes in the corresponding unit integrated circuit. By selectively bringing the bypass circuit into a transfer state, it is possible to effectively couple together all unit integrated circuits which are judged to be normal among a plurality of unit integrated circuits disposed along one row, for example. Improved redundancy arrangements are also provided, including first and second redundant elements for the unit integrated circuits, to effectively utilize the normal elements in the unit integrated circuits. Further, an improved arrangement for hierarchically connecting together the outputs of all the unit circuit blocks is provided which reduces the signal line load for the memory device.