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:
May. 25, 1993
Filed:
Apr. 08, 1991
Applicant:
Inventors:
Mitsuo Nanba, Tokyo, JP;
Masao Kondo, Hachioji, JP;
Takeo Shiba, Kodaira, JP;
Tohru Nakamura, Tanashi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
257528 ; 257773 ; 257 49 ;
Abstract
A semiconductor device including a polycrystalline silicone resistor which has a resistance of 40 k.OMEGA.-800 k.OMEGA. and which is formed by a polycrystalline silicon film having a specific resistivity of 0.01 .OMEGA..cm-0.1 .OMEGA..cm. The resistor having the above resistance, which has previously been difficult to fabricate, can be fabricated with a high accuracy, so it is very useful for several kinds of semiconductor integrated circuits such as bipolar memory.