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:
Jan. 07, 2003
Filed:
Nov. 08, 2001
Applicant:
Inventors:
Kozo Katayama, Kokubunji, JP;
Dai Hisamoto, Kodaira, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 1/604 ;
U.S. Cl.
CPC ...
G11C 1/604 ;
Abstract
A semiconductor memory device is constituted by forming two types of insulation films on the channel of an MOS transistor on which a vertical type another MOS transistor using the control gate of the MOS transistor as a substrate is stacked. Thus, a non-volatile semiconductor memory device small in size, having high reliability, high density, excellent fatigue and a random access function can be provided.