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:
Apr. 23, 2002
Filed:
Jun. 01, 1999
Applicant:
Inventors:
Mika Shiiki, Chiba, JP;
Jun Osanai, Chiba, JP;
Assignee:
Seiko Instruments Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 2/900 ;
U.S. Cl.
CPC ...
H01L 2/900 ;
Abstract
A semiconductor device comprises a ladder resistor circuit formed of a polycrystal silicon film having a thickness of 500-1500 Å and a sheet resistance of 1-5 k&OHgr;/. The polycrystal silicon film is doped only with p-type impurities.