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. 09, 2016
Filed:
Oct. 28, 2015
Mitsubishi Electric Corporation, Tokyo, JP;
Kenta Nakahara, Tokyo, JP;
Hiroshi Yoshida, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
An insulating substrate includes a base portion that is made of metal and serves as a radiating surface, an insulating layer, and a circuit pattern. The insulating substrate has convex warpage in the radiating surface at ambient temperature. A power semiconductor element is mounted on the circuit pattern. A sealing material has a thickness greater than a thickness of the insulating substrate. The sealing material has a linear expansion coefficient greater than a linear expansion coefficient of the insulating substrate in an in-plane direction of a mounting surface of the insulating substrate. A heat conduction layer is located on the radiating surface of the base portion and is solid at ambient temperature and is liquid at a temperature higher than or equal to a phase-change temperature higher than ambient temperature.