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:
Sep. 12, 2023
Filed:
Sep. 08, 2021
Applicant:
Shinko Electric Industries Co., Ltd., Nagano, JP;
Inventors:
Assignee:
SHINKO ELECTRIC INDUSTRIES CO., LTD., Nagano, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 23/495 (2006.01); H01L 21/48 (2006.01);
U.S. Cl.
CPC ...
H01L 23/49513 (2013.01); H01L 21/4828 (2013.01); H01L 23/49548 (2013.01);
Abstract
A lead frame includes: a die pad having a mounting surface for a semiconductor element; a recess included on the mounting surface; and a lead disposed around the die pad. The recess includes: a bottom surface positioned at a depth less than a thickness of the die pad from an opening plane of the recess; a plurality of protrusions protruding from the bottom surface; and a concavity recessed from the bottom surface.