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:
Aug. 27, 2013
Filed:
Dec. 08, 2011
Feng Liu, San Ramon, CA (US);
Tao Pan, San Jose, CA (US);
Zhigang Bai, Milpitas, CA (US);
Yugang Wang, Milpitas, CA (US);
Sining Mao, Fremont, CA (US);
Feng Liu, San Ramon, CA (US);
Tao Pan, San Jose, CA (US);
Zhigang Bai, Milpitas, CA (US);
Yugang Wang, Milpitas, CA (US);
Sining Mao, Fremont, CA (US);
Western Digital (Fremont), LLC, Fremont, CA (US);
Abstract
A perpendicular magnetic recording head for use in a hard disk drive has a main pole that has a main pole tip in proximity to an air bearing surface. The main pole tip has a first width at the ABS, extending distally at a first angle measured from the plane of the ABS to a second width measured at a first distance from the ABS. The main pole tip extends distally at a second angle measured from the plane of the ABS from the second width to a third width, wherein the second angle is less than the first angle. The main pole tip extends distally at a third angle measured from the plane of the ABS from the third width to a fourth width, wherein the third angle is greater than the second angle. The first distance is between 25 and 100 nanometers.