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:
Apr. 14, 2015
Filed:
Mar. 31, 2014
Western Digital (Fremont), Llc, Fremont, CA (US);
Hongping Yuan, Fremont, CA (US);
Bing K. Yen, Cupertino, CA (US);
Ling Wang, San Ramon, CA (US);
Xianzhong Zeng, Fremont, CA (US);
Dujiang Wan, Fremont, CA (US);
Hai Sun, Milpitas, CA (US);
Western Digital (Fremont), LLC, Fremont, CA (US);
Abstract
System and methods are provided for the manufacture of a magnetic write head including a pole and yoke region, and a nose shape transition region connecting the yoke to the pole having very small minimum radius of curvature, providing for a sharp transition. A double mask technique is used providing for the adjustment of an offset and illumination conditions between the first and second mask, which provides the capability of tuning the shape of the transition region, and achieving features that would otherwise not be achievable due to distortions caused by optical proximity effect.