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:
Jul. 04, 1989
Filed:
Nov. 15, 1988
Applicant:
Inventor:
Yasukazu Inoue, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 236 ; 357 231 ; 357 234 ; 357 2311 ; 357 41 ; 357 51 ; 357 55 ; 357 59 ;
Abstract
A highly integrated semiconductor memory device having one transistor type memory cells is disclosed. The capacitor and transistor of the memory cell is provided within and around one trench formed in the semiconductor substrate. The channel region of the transistor is positioned along the side wall of the trench with a ring shape in the plan view and the capacitor element is surrounded by the transistor within the trench.