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:
Feb. 06, 2018
Filed:
Dec. 22, 2016
Western Digital Technologies, Inc., Irvine, CA (US);
Western Digital Technologies, Inc., Irvine, CA (US);
Oleg Mryasov, Cupertino, CA (US);
Alan Kalitsov, San Jose, CA (US);
Hoan Ho, San Jose, CA (US);
Paul Dorsey, Los Altos, CA (US);
Gerardo Bertero, Redwood City, CA (US);
Western Digital Technologies, Inc., Irvine, CA (US);
Abstract
A recording medium having improved signal-to-noise ratio (SNR) capabilities includes dual cap layers over the recording layer, where the Curie temperature of the first cap layer over the recording layer is greater than the Curie temperature of the recording layer, and the Curie temperature of the second cap layer over the first cap layer is greater than the Curie temperature of the first cap layer. The first cap layer may be composed of a magnetically hard material, such as L1CoPt, where the second cap layer may be composed of a magnetically soft material, such as Co. Such a medium is particularly useful in the context of heat-assisted magnetic recording (HAMR).