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:
Jun. 02, 2009
Filed:
Apr. 18, 2006
Applicants:
Suping Song, Fremont, CA (US);
Kroum S. Stoev, Pleasanton, CA (US);
Biao Sun, Fremont, CA (US);
He LI, Fremont, CA (US);
Inventors:
Suping Song, Fremont, CA (US);
Kroum S. Stoev, Pleasanton, CA (US);
Biao Sun, Fremont, CA (US);
He Li, Fremont, CA (US);
Assignee:
Western Digital (Fremont), LLC, Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/39 (2006.01); G11B 5/187 (2006.01);
U.S. Cl.
CPC ...
Abstract
A transducer for a disk drive head includes a pole tip protrusion (PTP) compensation layer disposed proximate to a write element of the head to at least partially offset the effect of pole tip protrusion. The PTP compensation layer can be above, below, or within the write element. Suitable materials for the PTP compensation layer include zirconium oxide ceramics characterized by negative coefficients of thermal expansion such as ZrMoO.