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:
May. 05, 2009
Filed:
Jul. 03, 2007
Shinji Murata, Fukushima-ken, JP;
Shinji Murata, Fukushima-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A Contact according to an aspect of the present invention is formed by laminating a shape memory alloy film on a surface of a metal spring film, and the shape thereof is a conical spiral. A manufacturing method therefor is composed of 11 steps including a step of preparing a sacrificial metal film, a step of forming a resist cone, a step of patterning a resist film, a step of preparing a shape memory alloy film, and the like. Since an organic resist material has poor heat resistance, the sacrificial metal film is formed in advance, the resist is removed before sputtering of the shape memory alloy film, the sacrificial metal film is removed after sputtering of a shape memory alloy and a heat treatment, which are performed at high temperatures, so as to lift off an excess shape memory alloy film.