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. 09, 1991
Filed:
Mar. 31, 1989
Applicant:
Inventors:
Masaru Ishizuka, Kawasaki, JP;
Yasuyuki Yokono, Tokyo, JP;
Asako Matsuura, Yokohama, JP;
Yoshio Kamei, Yoshikawa, JP;
Hiromichi Ohashi, Yokohama, JP;
Mitsuhiko Kitagawa, Tokyo, JP;
Tomiya Sasaki, Tokyo, JP;
Shigeki Monma, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 74 ; 357 75 ; 357 79 ; 357 80 ; 357 81 ; 357 82 ;
Abstract
A semiconductor switching apparatus includes a member for radiating heat generated from semiconductor switching element chips and for reducing a thermal stress. The lengths of gate electrode wires are equally set. The semiconductor switching apparatus has a large capacity and good switching characteristics.