Magnetic recording head having quilted-type coating

• US 8,837,082 B2
• Filed: 04/27/2012
• Issued: 09/16/2014
• Est. Priority Date: 04/27/2012
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Biskeborn, Robert G., Lo, Calvin S.
• Primary Examiner(s): EVANS, JEFFERSON A
• Application Number:
  US13/457,916
• Publication Number:
  US 20130286500A1
• Time in Patent Office: 872 Days
• Field of Search: 360/121, 360/122, 360/128, 360/125.72, 360/125.73, 360/129
• US Class Current: 360/122
• CPC Class Codes: G11B 21/02 Driving or moving of heads
• CPC Class Codes: G11B 5/00821 using stationary heads
• CPC Class Codes: G11B 5/00826 comprising a plurality of single poles or gaps or groups thereof operative at the same time
• CPC Class Codes: G11B 5/3106 where the integrated or assembled structure comprises means for conditioning against physical detrimental influence, e.g. wear, contamination G11B5/3133 takes precedence
• CPC Class Codes: G11B 5/4893 relative to moving tape
• CPC Class Codes: Y10T 428/11 Magnetic recording head

Abstract

A module according to one embodiment includes a plurality of transducers; a tape bearing surface having a transducer region aligned with the transducers in a tape travel direction, and outer regions flanking the transducer region in a direction perpendicular to the tape travel direction; a first coating on the transducer region of the tape bearing surface; and a second coating on at least one of the outer regions of the tape bearing surface, the second coating being different than the first coating.

Claims

1. A module, comprising:

a plurality of transducers;

a tape bearing surface having a transducer region aligned with the transducers in a tape travel direction, and outer regions flanking the transducer region in a direction perpendicular to the tape travel direction;

a first coating on the transducer region of the tape bearing surface; and

a second coating on at least one of the outer regions of the tape bearing surface, the second coating being different than the first coating,

wherein either the first coating is present in all areas of the tape bearing surface not occupied by the second coating, or the first coating is spaced apart from the second coating and the tape bearing surface is continuous along a plane extending across the transducer region and outer regions.

2. A module as recited in claim 1, wherein the first coating is harder than the second coating.

3. A module as recited in claim 1, wherein the second coating has a lower coefficient of sliding friction than the first coating.

4. A module as recited in claim 1, wherein the second coating has a higher coefficient of sliding friction than the first coating.

5. A module as recited in claim 1, wherein the second coating is thicker than the first coating.

6. A module as recited in claim 1, wherein a portion of the second coating is thicker in areas of the tape bearing surface corresponding to locations where tape edges align in each data band.

7. A module as recited in claim 1, wherein a leading end of the tape bearing surface is beveled.

8. A module as recited in claim 1, wherein the first coating covers a media-facing side of at least one of the transducers.

9. A data storage system, comprising:

a magnetic head having a module as recited in claim 1;

a drive mechanism for passing a magnetic medium over the magnetic head; and

a controller electrically coupled to the magnetic head.

10. A module, comprising:

a plurality of transducers;

a tape bearing surface having a transducer region aligned with the transducers in a tape travel direction, and outer regions flanking the transducer region in a direction perpendicular to the tape travel direction;

a first coating on the transducer region of the tape bearing surface; and

a second coating on at least one of the outer regions of the tape bearing surface, the second coating being different than the first coating,

wherein the first coating is also present on the at least one of the outer regions of the tape bearing surface.

11. A module as recited in claim 10, wherein the second coating is surrounded by the first coating on the at least one of the outer regions of the tape bearing surface.

12. A module as recited in claim 10, wherein the second coating is located above the first coating on the at least one of the outer regions of the tape bearing surface.

13. A module, comprising:

a plurality of transducers selected from a group consisting of data readers, servo readers, and data writers;

a tape bearing surface having a transducer region aligned with the transducers in a tape travel direction, and outer regions flanking the transducer region in a direction perpendicular to the tape travel direction;

a first coating on the transducer region of the tape bearing surface, the first coating covering a media-facing side of at least one of the transducers; and

a second coating on at least one of the outer regions of the tape bearing surface, the second coating being different than the first coating.

14. A module as recited in claim 13, wherein the second coating is thicker than the first coating.

15. A module as recited in claim 13, wherein the first coating is spaced apart from the second coating.

16. A module as recited in claim 13, wherein the first coating is also present on the at least one of the outer regions of the tape bearing surface.

17. A module as recited in claim 16, wherein the second coating is surrounded by the first coating on the at least one of the outer regions of the tape bearing surface.

18. A module as recited in claim 16, wherein the second coating is located above the first coating on the at least one of the outer regions of the tape bearing surface.

19. A module as recited in claim 13, wherein a portion of the second coating is thicker in areas of the tape bearing surface corresponding to locations where tape edges align in each data band.

20. A module as recited in claim 13, wherein the first coating present in all areas of the tape bearing surface not occupied by the second coating.

21. A module as recited in claim 13, wherein a leading end of the tape bearing surface is beveled.

22. A magnetic head, comprising at least two modules as recited in claim 13, wherein the first coating is harder than the second coating, wherein the second coating has a lower coefficient of sliding friction than the first coating.

23. A data storage system, comprising:

a magnetic head having a module as recited in claim 13;

a drive mechanism for passing a magnetic medium over the magnetic head; and

a controller electrically coupled to the magnetic head.