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. 11, 1995
Filed:
Aug. 04, 1993
Applicant:
Inventor:
Tomofune Tani, Sagamihara, JP;
Assignee:
Nippon Steel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
437 52 ; 437 60 ; 437 69 ;
Abstract
A method of manufacturing a semiconductor memory device including at least one memory cell having a transistor and a capacitor, forming at least one trench in a surface of a semiconductor substrate, forming a semiconductor film covering the surface of the semiconductor substrate and an inner wall of the trench, forming an oxidation-resistant film to cover at least a first part of the semiconductor film covering the inner wall of the trench including a bottom surface of the trench, and oxidizing a second part of the semiconductor film, which is not covered by the oxidation-resistant film, thereby to form an element isolation insulating film.