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:
Sep. 30, 2014
Filed:
Sep. 04, 2012
Xiaomin Yang, Sewickley, PA (US);
Shuaigang Xiao, Pittsburgh, PA (US);
Jie Gong, Eden Prairie, MN (US);
Michael Seigler, Pittsburgh, PA (US);
XiaoMin Yang, Sewickley, PA (US);
Shuaigang Xiao, Pittsburgh, PA (US);
Jie Gong, Eden Prairie, MN (US);
Michael Seigler, Pittsburgh, PA (US);
Seagate Technology LLC, Cupertino, CA (US);
Abstract
A method for forming a magnetic write pole with a trapezoidal cross-section is described. The method consists of first forming a magnetic seedlayer on a base followed by depositing a removable material layer on the seedlayer, and then a resist layer on the removable material layer. A trench is then formed in the resist, and the resist is heated to cause the cross -sectional profile of the trench to assume a trapezoidal shape. The resist is then capped with another resist layer and further heated to cause the width of the trapezoidal trench to become narrower. The cap layer and removable material layer at the bottom of the trench are then removed and the trench filled with magnetic material by electroplating. The resist and seedlayer external to the trench are finally removed to form a write pole with a trapezoidal cross-section.