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. 13, 2012
Filed:
Apr. 28, 2009
Applicants:
Jui-chung Lee, Tou-Liu, TW;
Po-hsin Lin, Chunan, TW;
Kun-feng Lee, Hsinchu, TW;
Inventors:
Assignee:
Macronix International Co., Ltd., Hsinchu, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A leadframe includes a die paddle and leads, in which the back side of the die paddle has a fillister. The fillister defines a rim surrounding a recess, and the recess accommodates protrusion of fusible material. Also, a package includes such a leadframe. Also, a method for making a leadframe includes patterning a sheet of metal to form a die paddle and leads, and forming a fillister in the back side of the die paddle.