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:
Feb. 06, 2001
Filed:
Nov. 28, 1997
Applicant:
Inventors:
Yoshihiro Kondou, Ibaraki-ken, JP;
Tadakatsu Nakajima, Ibaraki-ken, JP;
Shigeo Ohashi, Tsuchiura, JP;
Susumu Iwai, Hadano, JP;
Masayoshi Miyazaki, Hadano, JP;
Shoohei Fuse, Hadano, JP;
Kazuo Morita, Hadano, JP;
Hidetada Fukunaka, Hadano, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05B 1/300 ; G05B 1/500 ; G05B 2/100 ;
U.S. Cl.
CPC ...
G05B 1/300 ; G05B 1/500 ; G05B 2/100 ;
Abstract
A semiconductor device provided with a first cooling fan and heat-radiating fins is mounted on a board, and there is provided a second cooling fan for supplying cooling air to the board, such that a flow passage is formed for directing the cooling air, supplied from the second cooling fan, toward the board through the first cooling fan.