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:
Feb. 04, 1997
Filed:
Jul. 13, 1994
Applicant:
Inventors:
Hiroyasu Makihara, Hyogo, JP;
Akira Okugaki, Hyogo, JP;
Kenji Kohda, Hyogo, JP;
Masahide Kaneko, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
257390 ; 257391 ; 257392 ; 437 48 ; 437 52 ;
Abstract
A mask ROM device includes a plurality of memory cells each having an enhancement type FET having a gate electrode and first and second source/drain regions, a plurality of word lines connected to the gate electrodes, a plurality of bit lines connected to the first source/drain regions, a connection line formed above the gate electrode so as to electrically connect the first and second source/drain regions through contact holes in each of memory cells selected according to information to be stored.