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:
Mar. 11, 1986
Filed:
Apr. 26, 1983
Applicant:
Inventor:
Masami Hashimoto, Suwa, JP;
Assignee:
Kabushiki Kaisha Suwa Seikosha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; G11C / ;
U.S. Cl.
CPC ...
357 2312 ; 357 59 ; 357 41 ; 357 46 ; 357 231 ; 357 45 ; 365104 ; 365 94 ;
Abstract
A first ROM is comprised of a transistor matrix. The polycrystalline silicon forming the gates of the transistors of the first ROM and another polycrystalline silicon region are arranged in a matrix, and diodes are formed by PN junctions at the crossing points. Thus, a second ROM is comprised of a diode matrix. The two ROMS are formed in layers on one common plane and each ROM can retain different information, independently of each other.