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. 12, 2019
Filed:
Dec. 08, 2017
Ohkuchi Materials Co., Ltd., Kagoshima, JP;
Ryuuji Ookawauchi, Kagoshima, JP;
OHKUCHI MATERIALS CO., LTD., Kagoshima, JP;
Abstract
A lead frame includes a metal plate, having a surface partitioned, by a concavity, into columnar areas, and a plating layer including stacked Ni, Pd and Au layers on the surface at top faces of the columnar areas, to form columnar pieces, which serve as internal connecting terminals, respectively, or as internal connecting terminals and pads, respectively. Each of the columnar pieces has, around a circumference of an upper portion thereof, curved regions intervening between straight regions. In each curved region, a side face of the plating layer protrudes outwardly in a horizontal direction from an uppermost portion of a side face of the metal plate in each of the columnar pieces. At a center of each straight region, the side face of the plating layer has substantially a same horizontal position as the uppermost portion of the side face of the metal plate in each of the columnar pieces.