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:
Aug. 20, 2002
Filed:
Mar. 28, 2001
Applicant:
Inventors:
Kazuyuki Mikubo, Tokyo, JP;
Sakae Kitajo, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06N 7/00 ; G06F 1/500 ; G01N 2/518 ; G01N 2/520 ;
U.S. Cl.
CPC ...
G06N 7/00 ; G06F 1/500 ; G01N 2/518 ; G01N 2/520 ;
Abstract
The thermal resistance of an entire semiconductor package with a semiconductor chip and radiation fins is calculated based on thermal resistance of resin between the semiconductor chip and case, thermal resistance of the radiation fins, and thermal resistance of three heat radiation paths in the semiconductor package. One of said three heat radiation paths is passing through the bottom surface of the case. The other of said three radiation paths is passing through the leadframe. The other of three radiation paths is passing through sides of the case other than the leadframe.