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. 30, 1991
Filed:
Aug. 13, 1990
Applicant:
Inventors:
Shinichiro Kimura, Hachioji, JP;
Yoshifumi Kawamoto, Kanagawa, JP;
Toru Kaga, Urawa, JP;
Hideo Sunami, Tokyo, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 236 ; 357 41 ; 357 49 ; 357 51 ; 357 54 ; 357 59 ; 357 71 ;
Abstract
A megabit dynamic random access memory realizing high integration and high reliability is disclosed. The need for an allowance for photomask alignment which is carried out to produce a stacked capacitor memory cell is eliminated. The plate electrode of each memory cell is isolated from the corresponding data line in a memory array by means of an insulating film which is self-alignedly provided around the plate electrode.