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:
Aug. 26, 2025
Filed:
May. 01, 2024
Western Digital Technologies, Inc., San Jose, CA (US);
Quang Le, San Jose, CA (US);
Tan Duy Trinh, San Jose, CA (US);
Hassan Osman, San Jose, CA (US);
Maki Maeda, Fujisawa, JP;
Qing Dai, San Jose, CA (US);
Hisashi Takano, Fujisawa, JP;
Western Digital Technologies, Inc., San Jose, CA (US);
Abstract
The present disclosure generally relates to a magnetic recording drive comprising a write head disposed over a media. The write head comprises a main pole, a waveguide disposed adjacent to the main pole, a near field transducer (NFT) coupled between the main pole and the waveguide at a media facing surface (MFS) and a head overcoat disposed on the MFS, the head overcoat comprising SiN. The head overcoat has an extinction coefficient (k) value of about 0.0. The media comprises a media overcoat disposed adjacent to the head overcoat. The media overcoat comprises a first layer of C and a second layer of SiN disposed on the first layer. The media overcoat has a k-value of about 0.5 or greater. The head overcoat is transparent while the media overcoat is heat absorbent.