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:
Dec. 28, 1999
Filed:
Mar. 12, 1998
Applicant:
Inventors:
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
257670 ;
Abstract
The invention is a lead frame (30) with tie bars (32-35) having reenforcing channels (44, 53, 64) extending at least a portion of the length of the tie bar. The lead frame (30) and channels (44, 53, 64) in the tie bars (32-35) may be formed either by stamping or by chemical etching. Each channel tie bar has at least two parts (51,52) forming a channel, the parts extending from each other at an angle less than 180.degree..