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:
May. 29, 2012
Filed:
Jun. 30, 2011
Cherng-chyi Han, San Jose, CA (US);
Min LI, Dublin, CA (US);
Fenglin Liu, Milpitas, CA (US);
Lijie Guan, San Jose, CA (US);
Cherng-Chyi Han, San Jose, CA (US);
Min Li, Dublin, CA (US);
Fenglin Liu, Milpitas, CA (US);
Lijie Guan, San Jose, CA (US);
Headway Technologies, Inc., Milpitas, CA (US);
Abstract
A perpendicular magnetic recording (PMR) head has a pole tip shielded laterally by a separated pair of bottom side shields and shielded from above by an upper shield. The bottom side shields surround a lower portion of the pole tip while the upper portion of the pole tip is surrounded by non-magnetic layers. The bottom shields and the non-magnetic layer form a wedge-shaped trench in which the pole tip has been formed by a self-aligned plating process. A write gap layer and an upper shield is formed above the side shields and pole. The resulting structure substantially eliminates track overwrite while maintaining good track definition.