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. 19, 1996
Filed:
Sep. 30, 1994
Applicant:
Inventor:
Masaaki Ikegami, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
257538 ; 257536 ; 257904 ; 257380 ;
Abstract
A semiconductor device is disclosed that can effectively prevent a change in the resistance ratio of polysilicon resistor films when a plasma nitride film is formed above a plurality of polysilicon resistor films. The semiconductor device has metal interconnection layers 5a and 5b formed above polysilicon resistor films 3a and 3b, respectively. The ratio of the overlapping area of the polysilicon resistor film 3a and the metal interconnection layer 5a is set to be substantially equal to that of the polysilicon resistor film 3b and the metal interconnection layer 5b.