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. 20, 2018
Filed:
Dec. 12, 2016
Seagate Technology Llc, Cupertino, CA (US);
Jiaoming Qiu, Maple Grove, MN (US);
Yonghua Chen, Edina, MN (US);
Ganping Ju, Pleasanton, CA (US);
Thomas P. Nolan, Fremont, CA (US);
Seagate Technology LLC, Cupertino, CA (US);
Abstract
One embodiment described herein is directed to a method involving depositing a seed layer on a substrate, the seed layer comprising A1 phase FePt with a ratio of Pt of Fe greater than 1:1. A main layer is deposited on the seed layer, the main layer comprising A1 phase FePt with a ratio of Pt to Fe of approximately 1:1. A cap layer is deposited on the main layer, the cap layer comprising A1 phase FePt with a ratio of Pt to Fe of less than 1:1. The seed, main and cap layers are annealed to convert the A1 phase FePt to L1phase FePt having a graded FePt structure of varying stoichimetry from approximately FePtadjacent a lower portion of the structure proximate the substrate to FePtadjacent an upper portion of the structure opposite the lower portion.