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:
Feb. 23, 2010
Filed:
Dec. 14, 2004
Fumio Kurotori, Tokyo, JP;
Takaji Ishikawa, Tokyo, JP;
Tadao Saito, Tokyo, JP;
Advantest Corporation, Tokyo, JP;
Abstract
A contact pin () for contacting a terminal of a wafer and supplying a signal to that wafer is provided with a first conductive layer () composed of a first conductive material having a relatively higher hardness than the oxide film formed on the terminal of the wafer, a second conductive layer () composed of a second conductive material having a relatively lower hardness than the oxide film, and a base material () with the first conductive layer () and second conductive layer () formed at the outside, the first conductive layer () being formed so as to closely contact the outside of the second conductive layer (), the first conductive layer () and second conductive layer () both being exposed at the front end face () of the contact pin ().