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. 27, 2012
Filed:
Jun. 09, 2006
Lei Larry Zhang, San Jose, CA (US);
Lei Larry Zhang, San Jose, CA (US);
Western Digital (Fremont), LLC, Fremont, CA (US);
Abstract
A method for manufacturing a perpendicular magnetic recording transducer is described. A metallic underlayer, an insulator on the metallic underlayer, and a metal mask on the insulator are provided. The metal mask has an aperture therein. A trench is formed in the insulator. The trench's bottom is narrower than its top and includes part of the metallic underlayer. The top has a width of not more than 0.28 micron. A nonmagnetic seed layer that substantially covers at least the trench bottom and sides and that has a thickness of at least five hundred Angstroms is provided. A perpendicular magnetic pole material is plated on at least part of the seed layer. A CMP is performed, removing part of the perpendicular magnetic pole material. A remaining portion of the perpendicular magnetic pole material forms a perpendicular magnetic recording pole. The nonmagnetic seed layer is a stop layer for the CMP.