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:
Mar. 22, 2011
Filed:
Mar. 09, 2007
Kyusik Sin, Pleasanton, CA (US);
Mun Hyoun Park, Fremont, CA (US);
Honglin Zhu, Fremont, CA (US);
Christopher T. Ngo, Fremont, CA (US);
Kyusik Sin, Pleasanton, CA (US);
Mun Hyoun Park, Fremont, CA (US);
Honglin Zhu, Fremont, CA (US);
Christopher T. Ngo, Fremont, CA (US);
Western Digital (Fremont), LLC, Fremont, CA (US);
Abstract
The method and system for providing a perpendicular magnetic recording (PMR) head are described. The PMR head includes a base layer, a nonmagnetic metal underlayer on the base layer, and a PMR pole on the nonmagnetic metal underlayer. The PMR pole has a top that is wider than its bottom. The base layer has a first hardness with respect to a pole trim. The nonmagnetic metal underlayer has a second hardness with respect to the pole trim. The second hardness is less than the first hardness.