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:
Nov. 21, 1989
Filed:
Apr. 22, 1988
Applicant:
Inventors:
Noboru Moriuchi, Tokyo, JP;
Yoshiki Yamaguchi, Tokyo, JP;
Toshihiko Tanaka, Tokyo, JP;
Norio Hasegawa, Hinode, JP;
Yoshifumi Kawamoto, Kanagawa, JP;
Shin-ichiro Kimura, Hachioji, JP;
Toru Kaga, Urawa, JP;
Tokuo Kure, Kokubunji, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
437 52 ; 437 38 ; 437 47 ; 437 60 ; 437228 ; 437235 ;
Abstract
A semiconductor memory wherein a memory cell region having a plurality of memory cells and has higher altitude from the surface of semiconductor substrate is formed in the recessed part of semiconductor substrate having the recessed part and projected part and a peripheral circuit region which is comparatively low from the surface of semiconductor substrate is formed to the projected part of semiconductor substrate.