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:
Oct. 23, 2001
Filed:
May. 27, 1999
Applicant:
Inventors:
Richard K. Williams, Cupertino, CA (US);
Allen K. Lam, Fremont, CA (US);
Alexander K. Choi, Cupertino, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05K 1/18 ;
U.S. Cl.
CPC ...
H05K 1/18 ;
Abstract
A leadframe for making an electric connection to a semiconductor die contains a plurality of notches which correspond to the edges of the die. Shorts are thereby prevented between the leadframe and electrical elements near the edge of the die, even when the leadframe is bent in the direction of the die to make a surface mount package. Alternatively or additionally, the leads in the leadframe may contain moats which prevent the epoxy or solder used to attach the leadframe to a die from spreading outward and thereby creating electrical shorts with other leads.