Patent · US Active

Multiple layer FePt structure

US9520151B2 · kind B2 · utility

5Cited by

3References

17Claims

0Family size

Assignee

Seagate Technology LLC · US

Inventors

Jiaoming Qui · Maple Grove, US
Yonghua Chen · Bloomington, US
Ganping Ju · Pleasanton, US
Thomas P. Nolan · Fremont, US

Key dates

Filing date	Mar 15, 2013
Grant date	Dec 13, 2016
Priority date	—
Expiry date	Dec 7, 2034

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC21D2281/02
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A method involves depositing a seed layer comprising at least A1 phase FePt. A main layer of A1 phase FePt is deposited over the seed layer. The main layer includes FePt of a different stoichiometry than the seed layer. The seed and main layers are annealed to convert the A1 phase FePt to L10 phase FePt. The annealing involves heating the substrate prior to depositing at least part of the A1 phase FePt of the main or seed layers.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.