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:
Jan. 22, 2019
Filed:
Apr. 30, 2018
Headway Technologies, Inc., Milpitas, CA (US);
Weihao Xu, San Jose, CA (US);
Cherng-Chyi Han, San Jose, CA (US);
Weisheng Hu, Fremont, CA (US);
Shengyuan Wang, San Jose, CA (US);
Wen-Ding Huang, Fremont, CA (US);
Ittetsu Kitajima, Cupertino, CA (US);
Headway Technologies, Inc., Milpitas, CA (US);
Abstract
A method of forming a TAMR (thermally assisted magnetic recording) write head that uses weakly plasmonic materials that are mechanically strong and thermally stable to create plasmon near field energy. The replacement of highly plasmonic materials like Au with a weakly plasmonic material like Rh avoids the thermal deformations of softer metals like Au. To maintain the performance of the head, it includes pre-focusing structures that concentrate plasmon energy as it moves towards the air bearing surface (ABS). A waveguide blocker at the distal end of the waveguide enhances the plasmons at the interface between the blocker and the dielectric material at the distal end of the waveguide. A pair of symmetrically disposed optical side shields (OSS) are formed to either side of the pole tip and a weakly plasmonic optical field enhancer of sharply defined line-width further strengthens the optical field at its point of application. The resulting structure can be effectively used in a magnetic recording apparatus such as a hard disk drive.