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:
Sep. 29, 2026
Filed:
May. 07, 2025
Seagate Technology Llc, Fremont, CA (US);
Chubing Peng, Eden Prairie, MN (US);
Seagate Technology LLC, Fremont, CA (US);
Abstract
Described are recording heads for heat assisted magnetic recording that include a light delivery waveguide that delivers light for excitation of a near-field transducer, where the waveguide has a multilayer core. The multilayer core includes a top outer layer nearest to the near-field transducer that has a lower refractive index than an inner layer of multilayer core. The described waveguides having a multilayer core can improve NFT coupling efficiency, which in turn can allow the use of lower optical power density, and thus provide better reliability for recording head components such as the near-field transducer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile