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. 06, 2007
Filed:
Feb. 16, 2005
Charles Mathew Mate, San Jose, CA (US);
Robert N. Payne, San Jose, CA (US);
Charles Mathew Mate, San Jose, CA (US);
Robert N. Payne, San Jose, CA (US);
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
A slider-disk interface tester for measuring the friction force at the interface uses a 'negative-pitch' slider in contact with a rotating disk. The tester includes a base that supports a motor for rotating the disk and an actuator for supporting the slider and moving it to a desired radial location on the disk surface. The slider is connected to the actuator by a rigid arm and a suspension like the suspension used in disk drives. When the disk is rotating, the negative-pitch slider has its upstream or leading portion in contact with the disk surface and its downstream or trailing portion not in contact with the disk surface. A contact pad is located at the leading portion of the slider and is in contact with the disk surface. The tester includes a friction-force sensor and associated measurement circuitry, such as strain gauge, piezoelectric and temperature sensors, and is located at one of several locations on the rigid arm, suspension or slider.