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:
Oct. 12, 2010
Filed:
Feb. 23, 2006
Applicants:
Makoto Iijima, Kawasaki, JP;
Seiji Ueno, Kawasaki, JP;
Osamu Igawa, Kawasaki, JP;
Inventors:
Assignee:
Fujitsu Semiconductor Limited, Yokohama, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05K 7/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor device includes a board, a semiconductor element mounted on one of main surfaces of the board, a plurality of passive elements provided in the vicinity of the semiconductor element, and a heat radiation plate mounted above the board and connected to a rear surface of the semiconductor element via a heat conductive material. A surface roughness of a surface of the heat radiation plate which surface comes in contact with the heat conductive material is non-uniform at a whole of the surface.