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:
Oct. 18, 2022
Filed:
Mar. 19, 2021
Seagate Technology Llc, Fremont, CA (US);
Robert D. Turner, Thorton, CO (US);
Yuhang Cheng, Edina, MN (US);
Peter W. Kanas, Berkeley, CA (US);
Martin Liam McGarry, Ballymena, GB;
Peter Kevin McGeehin, Donegal, IE;
Kevin R. Heim, Eden Prairie, MN (US);
Edward Charles Gage, Lakeville, MN (US);
Shaikh Mubassar Ali, Minnetonka, MN (US);
Huazhou Lou, Eden Prairie, MN (US);
Seagate Technology LLC, Fremont, CA (US);
Abstract
A heat-assisted magnetic recording device is disposed in a hermetically sealed enclosure. The device includes a slider comprising a reader, a writer, and an optical waveguide configured to couple light from a light source to a near-field transducer situated at or near an air bearing surface of the slider. The near-field transducer comprises an enlarged portion and a peg extending from the enlarged portion in a direction of the air bearing surface. A fill gas is provided within the enclosure. The fill gas comprises a mixture of a low-density, inert gas and at least one gas that oxidizes carbon, where the total carbon oxidizing gas concentration of the fill gas is 3-50% by volume. In certain embodiments, the fill gas comprises a hydrogen concentration sufficient to retard oxidation of the peg when the peg is at an operating temperature associated with write operations.