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:
Dec. 22, 2015
Filed:
Sep. 15, 2014
Seiko Instruments Inc., Chiba-shi, Chiba, JP;
Koji Tsukagoshi, Chiba, JP;
SEIKO INSTRUMENTS INC., , JP;
Abstract
A semiconductor device has an island portion on which a semiconductor chip is adhered through intermediation of an insulating paste. Recessed portions having an inverted pyramid shape are formed in a semiconductor chip placing region of the island portion. A first opening angle formed by a normal extending upward from a vertex of each of the plurality of recessed portions each having an inverted pyramid shape and an opening line extending to an outer side of the semiconductor chip placing region is smaller than a second opening angle formed by the normal and an opening line extending to an inner side of the semiconductor chip placing region.