Method of making a multilayered magnetic structure

Details Method of making a multilayered magnetic structure Method of making a multilayered magnetic structure

2011-04-05

2011-04-05

McNeil, Jennifer C (Department: 1785)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

C428S828100

Reexamination Certificate

active

07919201

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.

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