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:
May. 11, 2010
Filed:
May. 05, 2008
Yuji Imai, Kanzaki-gun, JP;
Yuji Imai, Kanzaki-gun, JP;
Ushiodenki Kabushiki Kaisha, Tokyo, JP;
Abstract
A LED device formed of LED chips bonded to an exoergic member by the LED chips being bonded to an Au—Sn alloy layer formed on an upper surface of the exoergic member with columnar crystals being formed within the Au—Sn alloy layer extending in a direction perpendicular to the upper surface of the exoergic member. The method of producing the LED device forms an Sn film directly on the upper surface of the exoergic member, an Au film on a lower surface of the LED chips, mounts the LED chips with the Au film thereon onto the Sn film formed on the upper surface of the exoergic member, and the exoergic member with LED chips mounted thereon is heated in an atmosphere in which a forming gas flows, so that the LED chips are bonded to the exoergic member.