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:
Sep. 20, 2005
Filed:
Apr. 16, 2002
Hong S. Seing, San Jose, CA (US);
Bob C. Robinson, Hollister, CA (US);
Ullal Vasant Nayak, San Jose, CA (US);
Carl Robert Mendel, Santa Clara, CA (US);
Wesley Leroy Hillman, Morgan Hill, CA (US);
Tony Mello, San Jose, CA (US);
Steven Harry Voss, Rochester, MN (US);
Hong S. Seing, San Jose, CA (US);
Bob C. Robinson, Hollister, CA (US);
Ullal Vasant Nayak, San Jose, CA (US);
Carl Robert Mendel, Santa Clara, CA (US);
Wesley LeRoy Hillman, Morgan Hill, CA (US);
Tony Mello, San Jose, CA (US);
Steven Harry Voss, Rochester, MN (US);
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
Disclosed is an apparatus and method for dynamic fly height and roll adjustment of a physical asperity sensor (PAS) head. The PAS head is used to test disk asperity heights and mechanical interference (commonly known as glide height and take off height). The PAS may be adjusted through a pivoting device such as a joystick coupled through one or more actuators to the pivoting device by actuator arms. In one embodiment, the actuator is a piezoelectric motor. The PAS head may utilize a detector to indicate the distance of the disk asperity from the PAS head. The method comprises receiving the signal and in response, operating the actuators to adjust the position of the pivoting device to obtain a selected positioning of either the fly height or the roll of the PAS.