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:
Sep. 05, 2000
Filed:
Mar. 12, 1998
Applicant:
Inventors:
Masayuki Kawaguchi, Gunma, JP;
Yasunari Tagami, Gunma, JP;
Hirotsugu Hata, Gunma, JP;
Akira Hatsugai, Ashikaga, JP;
Assignee:
Sanyo Electric Company, Moriguchi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
257587 ; 257773 ;
Abstract
A lead electrode is formed to expose an active base region. A lead electrode for an emitter electrode is formed on the lead electrode in an emitter region, through an insulating film. The insulating film on the lead electrode is then etched to form a contact hole. After that, the emitter contact hole is formed to expose the lead electrode. Also, a silicon nitride film SN is interposed between the lead electrode and insulating film and between the lead electrode and LOCOS oxide film each to decrease resistance of the lead electrodes.