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:
Jun. 02, 2015
Filed:
Apr. 23, 2013
Hgst Netherlands B.v., Amsterdam, NL;
Vijay Prakash Singh Rawat, San Jose, CA (US);
Neil Leslie Robertson, Palo Alto, CA (US);
HGST Netherlands B.V., Amsterdam, NL;
Abstract
A heat-assisted magnetic recording (HAMR) head in which the core of the optical waveguide has an end face that abuts the NFT and the write pole lip has a diffusion barrier between the end face of the waveguide core and the write pole lip. The diffusion barrier layer may also be located between the waveguide core end face and the NFT, in which case it is formed of an optically transparent material, like TaN, TiN, ZrN, HfN, NbN, CrN, VN, TiC, TaC, WC, SiC or SiN, or a layer of Au, Ru, Rh or Ir with a thickness less than 5 nm. In addition to being located between both the NFT and the write pole lip and the waveguide core end face, the diffusion barrier layer may also be located between the waveguide core and the lower waveguide cladding layer.