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:
May. 18, 1999
Filed:
Dec. 17, 1997
Applicant:
Inventors:
Raymond A Frechette, North Providence, RI (US);
Christopher M Sullivan, Rochester, MA (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
438123 ; 29827 ;
Abstract
The invention is a method which deliberately applies exaggerated features (22,32) on the photo-image used to pattern the lead frame for etching. The resulting etched leads (20,25,29) will have a flat to concave shape at the end of the lead tips (23,26,30), which can be used to 'self-center' wire bond paths, eliminating the slung wire tendency altogether, provided the wire path crosses the lead tip within the concave shape region.
Frechette, Raymond. (1999). Method of forming flat inner lead tips on lead frame (U.S. Patent No. 5904503). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5904503
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile