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:
Nov. 06, 2012
Filed:
Mar. 03, 2010
Min LI, Dublin, CA (US);
Cherng-chyi Han, San Jose, CA (US);
Kenichi Takano, Santa Clara, CA (US);
Joe Smyth, Aptos, CA (US);
Min Li, Dublin, CA (US);
Cherng-Chyi Han, San Jose, CA (US);
Kenichi Takano, Santa Clara, CA (US);
Joe Smyth, Aptos, CA (US);
Headway Technologies, Inc., Milpitas, CA (US);
Abstract
A microwave assisted magnetic recording writer is disclosed with an octagonal write pole having a top portion including a trailing edge that is self aligned to a spin transfer oscillator (STO). Leading and trailing edges are connected by two sidewalls each having three sections. A first section on each side is coplanar with the STO sidewalls and is connected to a sloped second section at a first corner. Each second section is connected to a third section at a second corner where the distance between second corners is greater than the distance between first corners. A method of forming the writer begins with a trapezoidal shaped write pole in an insulation layer. Two ion beam etch (IBE) steps are used to shape top and middle portions of the write pole and narrow the pole width to <50 nm without breakage. Finally, a trailing shield is formed on the STO.