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:
Dec. 26, 2017
Filed:
Aug. 12, 2016
Headway Technologies, Inc., Milpitas, CA (US);
Tsutomu Chou, Nagano, JP;
Kouji Shimazawa, Nagano, JP;
Tobias Maletzky, San Jose, CA (US);
Weihao Xu, San Jose, CA (US);
Shinji Hara, Nagano, JP;
Yoshihiro Tsuchiya, Nagano, JP;
Yiming Wang, San Jose, CA (US);
Cherng-Chyi Han, San Jose, CA (US);
Xuhui Jin, San Jose, CA (US);
Headway Technologies, Inc., Milpitas, CA (US);
Abstract
A TAMR (thermal assisted magnetic recording) write head has a metal blocker formed against a distal end of a waveguide. The waveguide focuses optical radiation on an adjacent plasmon generator where it excites plasmon modes that heat the recording medium. Although the plasmon generator typically heats the recording medium using the plasmon near field to supply the required Joule heating, an unblocked waveguide would also send optical radiation to the medium and surrounding structures producing unwanted heating and device unreliability. The role of the blocker is to block the unwanted optical radiation and, thereby, to limit the heating to that supplied by the plasmon near field.