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. 03, 2001
Filed:
Jan. 15, 1999
Applicant:
Inventor:
Brian R. Pelly, Palos Verdes Estates, CA (US);
Assignee:
International Rectifier Corp., El Segundo, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 2/310 ;
U.S. Cl.
CPC ...
H01L 2/310 ;
Abstract
A massive heat slug in thermally coupled to the top of an IGBT to act as a local thermal inertia element to absorb and store heat from the die during peak temperature rise and to return heat to the die at reduced die temperature, thereby reducing the ratio of die peak temperature to die average temperature. The device is useful in applications in which the IGBT is called upon to carry current at a range of frequencies which includes very low (eg 3 Hz) frequencies as in a motor control circuit.