IP Library › Granted Patent US 8,841,008
Granted Patent B2
US 8,841,008 · App. 13/037,226 · Granted Sep 23, 2014

Lubricant for heat assisted magnetic recording

Inventors: Lei Li (Wexford, PA); Michael Joseph Stirniman (Fremont, CA); Jiping Yang (San Jose, CA)
Assignee: Seagate Technology LLC
G11B5/725C07C43/1786C07F9/65815
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Quick Facts
Patent No.
US 8,841,008
App. No.
13/037,226
Granted
Sep 23, 2014
Kind
B2
Abstract

Compositions for use in lubricating thin film storage media are provided, as well as storage media formed using the compositions, the compositions including one or more central cores having a cyclic group, and a plurality of arms extending from the central cores, wherein each arm comprises phenol or piperonyl. Methods of preparing the compositions are also provided. Methods of preparing storage media that incorporate the compositions therein are further provided.

Claims (58)

1. A composition comprising:

a compound having the following formula:

wherein

R f ═CH 2 OCH 2 -M-X,

and

M=CF 2 CF 2 O((CF 2 ) 3 O) n CF 2 CF 2 , CF 2 O(CF 2 CF 2 O) p (CF 2 O) q CF 2 , CF 2 O(CF(CF 3 )CF 2 O) n CF 2 , or CF 2 O(CF(CF 3 )CF 2 O) p (CF 2 O) q CF 2

wherein n, p, and q are integers greater than or equal to 1; and

a compound having the formula

wherein

R f ═CF 2 CF 2 O((CF 2 ) 3 O) n CF 2 CF 2 , CF 2 O(CF 2 CF 2 O) p (CF 2 O) q CF 2 , CF 2 O(C(CF 3 )FCF 2 O) n CF 2 , or CF 2 O(C(CF 3 )FCF 2 O) p (CF 2 O) q CF 2

wherein n, p, and q are integers greater than or equal to 1, and

or

combinations thereof.

2. An apparatus, comprising:

a substrate;

a magnetic layer for recording information disposed on the substrate;

a protective overcoat for protecting said magnetic layer; and

a lubricant comprising a compound having the following formula:

wherein

R f ═CH 2 OCH 2 -M-X,

and

M=CF 2 CF 2 O((CF 2 ) 3 O) n CF 2 CF 2 , CF 2 O(CF 2 CF 2 O) p (CF 2 O) q CF 2 , CF 2 O(CF(CF 3 )CF 2 O) n CF 2 , or CF 2 O(CF(CF 3 )CF 2 O) p (CF 2 O) q CF 2

wherein n, p, and q are integers greater than or equal to 1; and

a compound having the formula

wherein

R f ═CF 2 CF 2 O((CF 2 ) 3 O) n CF 2 CF 2 , CF 2 O(CF 2 CF 2 O) p (CF 2 O) q CF 2 , CF 2 O(C(CF 3 )FCF 2 O) n CF 2 , or CF 2 O(C(CF 3 )FCF 2 O) p (CF 2 O) q CF 2

wherein n, p, and q are integers greater than or equal to 1, and

or

combinations thereof.

3. The apparatus of claim 2 , wherein the lubricant has a thickness within a range selected from a group consisting of 0.5 nm and 2 nm.

4. The composition according to claim 1 , wherein the composition comprises:

wherein

R f ═CH 2 OCH 2 -M-X,

and

M=CF 2 CF 2 O((CF 2 ) 3 O) n CF 2 CF 2 , CF 2 O(CF 2 CF 2 O) p (CF 2 O) q CF 2 , CF 2 O(CF(CF 3 )CF 2 O) n CF 2 , or CF 2 O(CF(CF 3 )CF 2 O) p (CF 2 O) q CF 2

wherein n, p, and q are integers greater than or equal to 1; and

5. The composition according to claim 4 , wherein at least one Rf is different from the other two Rf.

6. The composition according to claim 4 , wherein the molecular weight of the compound is from about 4000 to 20000 g/mole.

7. The composition according to claim 1 , wherein the composition comprises:

wherein

R f ═CF 2 CF 2 O((CF 2 ) 3 O) n CF 2 CF 2 , CF 2 O(CF 2 CF 2 O) p (CF 2 O) q CF 2 , CF 2 O(C(CF 3 )FCF 2 O) n CF 2 , or CF 2 O(C(CF 3 )FCF 2 O) p (CF 2 O) q CF 2 ,

wherein n, p, and q are integers greater than or equal to 1, and

8. The composition according to claim 7 , wherein at least one Rf-X is different from the other two Rf-X.

9. The composition according to claim 7 , wherein the molecular weight of the compound is from about 4000 to 20000 g/mole.

10. The apparatus according to claim 2 , wherein the lubricant comprises:

wherein

R f ═CH 2 OCH 2 -M-X,

and

M=CF 2 CF 2 O((CF 2 ) 3 O) n CF 2 CF 2 , CF 2 O(CF 2 CF 2 O) p (CF 2 O) q CF 2 , CF 2 O(CF(CF 3 )CF 2 O) n CF 2 , or CF 2 O(CF(CF 3 )CF 2 O) p (CF 2 O) q CF 2

wherein n, p, and q are integers greater than or equal to 1; and

11. The apparatus according to claim 10 , wherein at least one Rf is different from the other two Rf.

12. The apparatus according to claim 10 , wherein the molecular weight of the compound is from about 4000 to 20000 g/mole.

13. The apparatus according to claim 2 , wherein the composition comprises:

wherein

R f ═CF 2 CF 2 O((CF 2 ) 3 O) n CF 2 CF 2 , CF 2 O(CF 2 CF 2 O) p (CF 2 O) q CF 2 , CF 2 O(C(CF 3 )FCF 2 O) n CF 2 , or CF 2 O(C(CF 3 )FCF 2 O) p (CF 2 O) q CF 2 ,

wherein n, p, and q are integers greater than or equal to 1, and

14. The apparatus according to claim 13 , wherein at least one Rf-X is different from the other two Rf-X.

15. The apparatus according to claim 13 , wherein the molecular weight of the compound is from about 4000 to 20000 g/mole.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 10, 2011
From: LI, LEI; STIRNIMAN, MICHAEL JOSEPH; YANG, JIPING
To: SEAGATE TECHNOLOGY LLC
Reel/Frame 026254/0883 →
Continuity (1)
Related Publication 20120219826A1 · Aug 30, 2012