Patent · US Active

Method of making a multilayered magnetic structure

US7919201B2 · kind B2 · utility

0Cited by

9References

8Claims

0Family size

Assignee

Seagate Technology LLC · US

Inventors

Li-Lien Lee · San Jose, US
Michael Z. Wu · San Jose, US
Shanghsien S. Rou · Fremont, US

Key dates

Filing date	Nov 13, 2008
Grant date	Apr 5, 2011
Priority date	—
Expiry date	Nov 13, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG11B5/7377
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A longitudinal magnetic recording medium comprising at least four magnetic layers including a substrate, a CoCrTa magnetic intermediate layer on the substrate, wherein the CoCrTa magnetic intermediate layer comprises Cr<16 at % and Ta<6 at %, a first CoCrPtB magnetic layer on the CoCrTa layer, wherein the first CoCrPtB magnetic layer comprises Cr: 10-14%, Pt: 4-8 at %, B: 6-10%, a second CoCrPtB magnetic layer on the first CoCrPtB magnetic layer, and a third CoCrPtB magnetic layer on the second CoCrPtB layer, wherein the third CoCrPtB magnetic layer comprises Cr: 12-16 at %, Pt: 12-16 at %, B: 10-14 at % and has <10 at % Cr than that in the second CoCrPtB magnetic layer is disclosed.

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