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. 16, 2003
Filed:
Aug. 29, 2001
Toyo Kohan Co., Ltd., Tokyo, JP;
Abstract
The present invention relates to a clad sheet for lead frame which can manufacture economically and has excellent characteristics, lead frame using thereof and manufacturing method thereof. A clad sheet for lead frame is manufactured by press-bonding copper foil to nickel foil at the reduction rate of 0.1 to 3%. Or, it is manufactured by press-bonding copper foil having nickel plating on one or both sides of it to the other copper foil at the reduction rate of 0.1 to 3%. Or, it is manufactured by press-bonding aluminum foil to nickel foil at the reduction rate of 0.1 to 3%. Further, it is also manufactured by press-bonding copper foil having nickel plating on one side of it to aluminum foil at the reduction rate of 0.1 to 3%. Clad sheet is comprising three layer of copper/nickel/copper or copper/nickel/aluminum.