Method of forming magnetic recording head having protected reader sensors and near zero recession writer poles

• US 9,343,097 B2
• Filed: 02/28/2013
• Issued: 05/17/2016
• Est. Priority Date: 08/31/2012
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Biskeborn, Robert G., Czarnecki, W. Stanley, Herget, Philipp, Lo, Calvin S.
• Primary Examiner(s): PHAN, THIEM D
• Application Number:
  US13/781,460
• Publication Number:
  US 20140059842A1
• Time in Patent Office: 1,174 Days
• Field of Search: 296/030.1, 296/030.7, 296/031.1, 296/031.6, 360/121, 360/122, 360/231, 360/234.7, 360/235.7, 360/237.1, 360/315
• US Class Current: 1/1
• CPC Class Codes: G11B 5/00813 magnetic tapes
• CPC Class Codes: G11B 5/00821 using stationary heads
• CPC Class Codes: G11B 5/187 Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features G11B5/265, G11B5/29 , G11B5/31 take precedence
• CPC Class Codes: G11B 5/255 comprising means for protection against wear in thin film structures G11B5/3106
• CPC Class Codes: G11B 5/29 Structure or manufacture of unitary devices formed of plural heads for more than one track G11B5/33, G11B5/49 and subgroups take precedence; in thin film structure G11B5/31
• CPC Class Codes: G11B 5/295 Manufacture
• 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 5/40 Protective measures on heads, e.g. against excessive temperature G11B5/31 takes precedence; protection against wear G11B5/255 ; protective structure of the head: see under structures, e.g. G11B5/3106
• CPC Class Codes: G11B 5/4893 relative to moving tape
• CPC Class Codes: G11B 5/84 Processes or apparatus specially adapted for manufacturing record carriers
• CPC Class Codes: Y10T 29/49021 Magnetic recording reproducing transducer [e.g., tape head, core, etc.]

Abstract

A method according to one embodiment includes applying a coating to a media facing side of a module, the module having first and second transducers of different magnetic transducer types positioned towards the media facing side of the module, wherein the different transducer types are selected from a group consisting of data reader transducers, servo reader transducers, write transducers, piggyback read-write transducers and merged read-write transducers; wherein the coating forms at least a portion of a first protection structure for protecting the first transducer; and wherein the second transducer has either no protection or is protected by a second protection structure that is different than the first protection structure.

Claims

1. A method, comprising:

applying a first coating to a media facing side of a module, the module having an array of transducers extending along a media facing side of the module, the array of transducers including at least one first transducer and several second transducers, the first and second transducers being of different magnetic transducer types positioned towards the media facing side of the module, wherein the different transducer types are selected from a group consisting of data reader transducers, servo reader transducers, write transducers, piggyback read-write transducers and merged read-write transducers,

wherein the first coating forms at least a portion of a first protection structure for protecting the at least one first transducer,

wherein the first protection structure is on both sides of the at least one first transducer in a direction of tape travel thereacross,

wherein the second transducers have either no protection or are protected by a second protection structure that is different than the first protection structure.

2. The method as recited in claim 1, wherein the first protection structure includes a coating on the media facing side of the module adjacent the at least one first transducer.

3. The method as recited in claim 2, comprising:

applying a second coating to the media facing side of the module, wherein the second coating forms at least a portion of the second protection structure for protecting the second transducers, wherein the second protection structure is on another portion of the media facing side that is adjacent the second transducers.

4. The method as recited in claim 3, wherein the second transducers are only protected by the second protection structure, wherein the at least one first transducer is only protected by the first protection structure.

5. The method as recited in claim 3, wherein the second protection structure is on both sides of the second transducers in a direction of tape travel thereacross.

6. The method as recited in claim 1, wherein the first protection structure is a recessed portion of the media facing side adjacent the at least one first transducer.

7. The method as recited in claim 6, wherein the first protection structure includes a coating on the recessed portion of the media facing side adjacent the at least one first transducer.

8. The method as recited in claim 6, wherein the second protection structure is present and includes a coating on another portion of the media facing side that is adjacent the second transducers.

9. The method as recited in claim 1, wherein the first protection structure includes a recessed portion of the media facing side adjacent the at least one first transducer, wherein the second protection structure is present and includes a recessed portion of the media facing side adjacent the second transducers, wherein an extent of recession of the recessed portion of the media facing side adjacent the second transducers is not as great as an extent of recession of the recessed portion of the media facing side adjacent the at least one first transducer.

10. The method as recited in claim 1, wherein the first and second transducers in the array are aligned along a straight line, the at least one first transducer flanking the second transducers in the array.

11. The method as recited in claim 1, wherein the module is part of a magnetic head, wherein the magnetic head also includes a second module having a configuration similar or identical to the module, the magnetic head being configured to operate with tape media.

12. The method as recited in claim 1, wherein the module is part of a magnetic head, wherein the magnetic head also includes a slider.

13. The method as recited in claim 1, wherein the first protection structure is also on both sides of the at least one first transducer in a direction perpendicular to the direction of tape travel thereacross.

14. A method, comprising:

applying a first coating to a media facing side of a module, the module having first and second transducers of different transducer types positioned towards a media facing side of the module, wherein the different transducer types are selected from a group consisting of data reader transducers, servo reader transducers, write transducers, piggyback read-write transducers and merged read-write transducers, wherein the first and second transducers are aligned with each other in a linear array, the first transducers flanking the second transducers;

wherein the first coating forms at least a portion of a first protection structure for protecting the first transducers; and

applying a second coating to the media facing side of the module, wherein the second coating forms at least a portion of a second protection structure that is different than the first protection structure, the second protection structure being for protecting the second transducers;

wherein the first protection structure is on both sides of the first transducers in a direction of tape travel thereacross,

wherein the second protection structure is on both sides of the second transducers in a direction of tape travel thereacross.

15. The method as recited in claim 14, wherein at least one of the first and the second transducers are present in an array extending along the media facing side of the module.

16. The method as recited in claim 15, wherein the first protection structure is also on both sides of the first transducer in a direction perpendicular to the direction of tape travel thereacross.

17. The method as recited in claim 16, wherein the first transducers are servo transducers.

18. The method as recited in claim 17, wherein the module is part of a magnetic head, wherein the magnetic head also includes a second module having a configuration similar or identical to the module, the magnetic head being configured to operate with tape media, wherein the magnetic head also includes a slider.

19. The method as recited in claim 14, wherein the second transducers are only protected by the second protection structure, wherein the first transducers are only protected by the first protection structure.