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. 29, 2008
Filed:
Mar. 31, 2005
Hokichi Yoshioka, Tokyo, JP;
Takayuki Yamaoka, Tokyo, JP;
Satoshi Senoo, Tokyo, JP;
Tecnisco Limited, Tokyo, JP;
Abstract
To prevent occurrence of distortion in a semiconductor cooling device and to prevent a semiconductor chip from being separated away from the semiconductor cooling device in case the semiconductor chip and the semiconductor cooling device are thermally expanded, a semiconductor cooling device includes at least an upper plate, an intermediate plate and a lower plate, and has a coolant inlet portion, an outlet portion and a flow passage portion. The upper plate and the lower plate are composite plates constituted by plating copper maintaining a thickness of not smaller than 0.05 mm on one surface or on both surfaces of auxiliary plates made of a material having a tensile strength of not smaller than 1000 N/mm, a heat conductivity of not smaller than 100 W/m·K and a coefficient of thermal expansion of not larger than 6.0 ppm/° C.