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:
Jul. 06, 2010
Filed:
Jul. 23, 2008
Applicant:
Kiyoaki Kadoi, Chiba, JP;
Inventor:
Kiyoaki Kadoi, Chiba, JP;
Assignee:
Seiko Instruments Inc., Chiba, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 23/495 (2006.01);
U.S. Cl.
CPC ...
Abstract
A surface of a lead frame of a semiconductor device package, on which a semiconductor chip is mounted, is formed to have a mesh structure, whereby a connecting area between the lead frame and a molding resin can be increased to have strong bonding. Further, only filler particles having a small diameter than the mesh are taken into the vicinity of the lead frame, suppressing the effect of stresses to reduce deformation of the lead frame.