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:
Apr. 12, 2011
Filed:
Oct. 15, 2007
Yasuo Matsui, Miyagi-ken, JP;
Shunji Araki, Miyagi-ken, JP;
Yasuo Matsui, Miyagi-ken, JP;
Shunji Araki, Miyagi-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
There is provided a method of manufacturing a circuit board having a first fixed contact and a second fixed contact that extend substantially orthogonal to each other on the same surface, the life span required for the first fixed contact being longer than that required for the second fixed contact. The method includes: etching a copper foil formed on the entire surface of an insulating substrate to form the patterns of the first and second fixed contacts; polishing the surface of the insulating substrate with buff to remove an oxide film adhered to the copper foil; and sequentially forming a nickel layer having a thickness of about 1 to about 5 μm and a gold layer having a thickness of about 0.01 to about 0.5 μm on each of the first and second fixed contacts. In the method, the buffing direction is substantially aligned with a direction in which a first movable contact slides on the first fixed contact.