Granted Patent B2

US 8,795,857 · App. 12/665,271 · Granted Aug 5, 2014

Abstract

Claims (13)

1. A perpendicular magnetic recording medium comprising:

a substrate;

a soft magnetic layer disposed above a surface of the substrate;

a magnetic recording layer disposed above the soft magnetic layer;

a continuous layer which is magnetically continuous in the in-plane direction of the substrate disposed above the magnetic recording layer;

a blocking layer disposed above the continuous layer and CVD (Chemical Vapour Deposition) deposited directly on the continuous layer to have a thickness of approximately 0.25 nm for blocking shock imposed on the continuous layer when carbon atoms are applied during formation of a medium protective layer; and

the medium protective layer containing carbon and formed on the blocking layer,

wherein the blocking layer is non-magnetic and formed only of amorphous CrTi, and

wherein the medium protective layer is formed on the blocking layer while a bias voltage of 100 V to 300 V is applied to the substrate.

2. The perpendicular magnetic recording medium according to claim 1 , wherein the medium protective layer is formed using a CVD (Chemical Vapour Deposition) method or a sputtering method.

3. The perpendicular magnetic recording medium according to claim 1 , wherein the blocking layer is formed of an element contained in the continuous layer.

4. The perpendicular magnetic recording medium according to claim 1 , wherein the medium protective layer contains diamond-like carbon.

5. The perpendicular magnetic recording medium according to claim 1 , wherein the continuous layer contains a Co—Cr alloy comprising CoCrPtB.

Assignments (6)