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:
Mar. 29, 2016
Filed:
Sep. 05, 2012
Yosuke Ishihara, Omuta, JP;
Hideki Hirotsuru, Omuta, JP;
Hideo Tsukamoto, Omuta, JP;
DENKA COMPANY LIMITED, Tokyo, JP;
Abstract
Disclosed is a clad material for an LED light-emitting element holding substrate in which a plurality of layers composed of different materials are stacked and bonded via a metal layer to a III-V group semiconductor crystal surface, the linear expansion coefficient being 14×10/K or less and the thermal conductivity at a temperature of 25° C. being 200 W/mK or greater. The clad material is composed of three alternately stacked layers: two copper layers and a molybdenum layer, the molybdenum layer being 10 to 60 vol % and the difference in thickness between the copper layers being 5% or less; or a clad material composed of three copper layers alternately stacked with molybdenum layers to make five layers, the molybdenum layers being 20 to 70 vol % and the difference in thickness between the top and bottom two copper layers and the molybdenum layers being 5% or less.