Recording medium
AssigneeFuji Electric Co., Ltd.
InventorTomonori Katano
Life of this patent
Estimating the term…
Abstract
A recording medium includes a magnetic recording layer formed on a substrate; a protective layer formed on the magnetic recording layer and having a total thickness that is equal to or greater than 1 nm but equal to or less than 2 nm. The protective layer is composed of a silicon oxide layer formed on the magnetic recording layer and having a thickness of 0.3 nm or more; a silicon layer formed on the silicon oxide layer and having a thickness of 0.2 nm or more; and an amorphous carbon layer formed on the silicon layer and having a thickness of 0.2 nm or more, and having a hydrogen content equal to or greater than 25.6 at % but equal to or less than 43.3 at %. Thus, magnetic spacing between the magnetic recording layer and a magnetic head advantageously may be reduced while maintaining the thermal insulation characteristics.
Claims1
A recording medium for reading/writing information by using a head implementing reading/writing on the basis of magnetic principles, the recording medium, comprising:
- (a) a substrate;
- (b) a magnetic recording layer formed on the substrate;
- (c) a protective layer formed on the magnetic recording layer and having a total thickness that is equal to or greater than 1 nm but equal to or less than 2 nm, and being comprised of:
- (i) a silicon oxide layer formed on the magnetic recording layer and having a thickness of 0.3 nm or more;
- (ii) a silicon layer consisting of silicon formed on the silicon oxide layer and having a thickness of 0.2 nm or more;
- and
- (iii) an amorphous carbon layer formed on the silicon layer and having a thickness of 0.2 nm or more, and having a hydrogen content equal to or greater than 25.6 at % but equal to or less than 43.3 at %;
- and
- (d) a lubricant layer formed on the protective layer.
Dependencies are inferred from the claim text.