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:
Jun. 22, 1999
Filed:
Apr. 28, 1997
Applicant:
Inventors:
Hem P Takiar, Fremont, CA (US);
Kuan L Chen, San Jose, CA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
257666 ; 257676 ; 257698 ; 257669 ;
Abstract
A lead frame structure includes a lead frame skeleton and at least one die bar connected between the lead frame skeleton and a non-quadrangular die attach paddle. Each of a plurality of leads has an outer edge connected to the lead frame skeleton and an inner edge disposed adjacent to but separated from the periphery of the die attach paddle. Preferably, the inner edge of each lead is separated from the periphery of the die attach paddle by about 5-10 mils.