Titanium-silicon protective film composition and apparatus

Patent metadata

Field	Value
Publication number	US-9045348-B2
Application number	US-201213598102-A
Country	US
Kind code	B2
Filing date	Aug 29, 2012
Priority date	Aug 29, 2012
Publication date	Jun 2, 2015
Grant date	Jun 2, 2015

Abstract

The present disclosure relates to a protective layer composition that includes Ti x Si y A, where A is C m , C m N l , O n C m , or O n C m N l and x, y, l, m, and n are positive integers. In one implementation, the protective layer composition has a ratio of x over (x+y) in the range of between about 0.1 and about 1.0. In another implementation, the protective layer composition has a ratio of x over (x+y) in the range of between about 0.3 and about 0.9. In yet another implementation, the protective layer composition has a ratio of x over (x+y) that is about 0.6. The protective layer composition may be amorphous. Also, the protective layer composition may include an atomic percentage of Ti that is less than about 20%. In one implementation of the protective layer composition, x is 2, y is 1, and A is C 3 .

First claim

What is claimed is:

1. A protective layer composition, comprising: Ti x Si y A, wherein A is selected from the group consisting of C m , C m N l , O n C m , and O n C m N l , wherein x, y, l, m, and n are positive integers, wherein the protective layer is amorphous, and wherein x is 2, y is 1, and A is C 3 .

2. The protective layer composition of claim 1 , wherein the atomic percentage of Ti is less than about 20%.

3. A magnetic recording medium, comprising:
a substrate;
a magnetic layer coating the substrate; and
a protective layer of a specific thickness coating the magnetic layer, the protective layer comprising Ti x Si y A, wherein A is selected from the group consisting of C m , C m N l , O n C m , and O n C m N l , wherein x, y, l, m, and n are positive integers, wherein the protective layer is amorphous, and wherein x is 2, y is 1, and A is C 3 .

4. The magnetic recording medium of claim 3 , wherein the magnetic layer comprises cobalt.

5. The magnetic recording medium of claim 3 , wherein the specific thickness of the protective layer is in the range of between about 5 and about 50 angstroms.

6. The magnetic recording medium of claim 3 , wherein the specific thickness of the protective layer is in the range of between about 15 and about 30 angstroms.

7. The magnetic recording medium of claim 3 , wherein the specific thickness of the protective layer is about 25 angstroms.

8. A magnetic hard disk drive device, comprising:
a substrate;
a magnetic layer coating the substrate;
a protective layer of a specific thickness coating the magnetic layer, the protective layer comprising Ti x Si y A, wherein A is selected from the group consisting of C m , C m N l , O n C m , and O n C m N l , wherein x, y, l, m, and n are positive integers, wherein the protective layer is amorphous, and wherein x is 2, y is 1, and A is C 3 ; and
a read/write head capable of flying at a specific distance away from the surface of the protective layer during operation of the magnetic hard disk drive device.

9. The magnetic hard disk drive device of claim 8 , wherein the distance between the read/write head and the surface of the protective layer is in the range of between about 10 and about 200 angstroms.

10. The magnetic hard disk drive device of claim 8 , wherein the distance between the read/write head and the surface of the protective layer is in the range of between about 30 and about 100 angstroms.

11. The magnetic hard disk drive device of claim 8 , wherein the distance between the read/write head and the surface of the protective layer is about 60 angstroms.

Assignees

• Rose Dit Rose Franck Dreyfus
• HGST Netherlands BV

Inventors

• Rose Dit Rose Franck Dreyfus

Classifications

• C04B35/5615

  based on titanium silicon carbides · CPC title

• C04B2235/77

  Density · CPC title

• Y10T428/1164

  with protective film · CPC title

• C01B32/907 Primary

  Oxycarbides; Sulfocarbides; Mixture of carbides · CPC title

• C04B35/584

  based on silicon nitride · CPC title