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:
Nov. 13, 2012
Filed:
Feb. 13, 2012
Jinqiu Zhang, Fremont, CA (US);
Liubo Hong, San Jose, CA (US);
Yong Shen, Saratoga, CA (US);
Hongping Yuan, Fremont, CA (US);
Tsung Yuan Chen, San Jose, CA (US);
Honglin Zhu, Fremont, CA (US);
Jinqiu Zhang, Fremont, CA (US);
Liubo Hong, San Jose, CA (US);
Yong Shen, Saratoga, CA (US);
Hongping Yuan, Fremont, CA (US);
Tsung Yuan Chen, San Jose, CA (US);
Honglin Zhu, Fremont, CA (US);
Western Digital (Fremont), LLC, Fremont, CA (US);
Abstract
A perpendicular magnetic recording (PMR) head comprises a PMR pole having at least one side, a bottom, and a top wider than the bottom, a first portion of the at least one side being substantially vertical, a second portion of the at least one side being nonvertical, the top portion having a width not greater than one hundred fifty nanometers. The PRM head further comprises a nonmagnetic layer surrounding the bottom and the at least one side of the PMR pole, an intermediate layer substantially surrounding at least the second portion of the at least one side of the PMR pole, and a hard mask layer adjacent to the first portion of the at least one side of the PMR pole.