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:
Aug. 03, 1993
Filed:
Jul. 27, 1992
Applicant:
Inventors:
Frank Djennas, Austin, TX (US);
Alan H Woosley, Austin, TX (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
257676 ; 257666 ;
Abstract
A semiconductor device (30) utilizes a lead frame (32) having a window-frame flag (36). An opening (44) within the flag creates an interior edge (46) which is tapered, preferably to an angle .phi. that is between 55.degree. and 65.degree.. The tapered interior edge reduces boundary-layer separation of a resin molding compound during formation of a resin package body (42). Thus, voids in the resin packaging material near the interior edge of the flag are less likely to be formed.