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. 11, 1996
Filed:
Feb. 21, 1995
Applicant:
Inventor:
Joseph P Mennucci, Manville, RI (US);
Assignee:
Technical Materials, Inc., Lincoln, RI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
257748 ; 257693 ; 257695 ; 257741 ; 257762 ; 257765 ; 257771 ; 257750 ; 257666 ;
Abstract
A leadframe for use in mounting and interconnecting an integrated circuit. A first or base metal layer of the leadframe comprises at least one of brass or other copper alloy. A second, conducting layer atop the base layer comprises at least one of aluminum or an aluminum alloy. A third, upper layer on the second layer comprises at least one of copper or a copper alloy. The first, second and third layers are formed into a multilayer clad strip, a portion of at least the third layer being selectively removed to expose a selected pattern of the second layer.