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. 21, 1989
Filed:
Jun. 06, 1988
Applicant:
Inventors:
Taiji Ema, Kawasaki, JP;
Takashi Yabu, Yokohama, JP;
Assignee:
Fujitsu Limited, Kanagawa, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 68 ; 357 41 ; 357 45 ; 357 59 ; 357 71 ;
Abstract
In a memory cell matrix region of a semiconductor memory device such as a dynamic RAM or a static RAM, wirings of the same material are distributed between different layers in such a manner that the upper wirings overlap the lower wirings. Accordingly, the width of the wirings can be increased for a semiconductor memory device having a high concentration and high integration.