Tape head and system having asymmetrical construction

• US 9,928,855 B1
• Filed: 10/31/2016
• Issued: 03/27/2018
• Est. Priority Date: 10/31/2016
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Biskeborn, Robert G.
• Primary Examiner(s): Klimowicz, William J
• Application Number:
  US15/339,829
• Time in Patent Office: 512 Days
• Field of Search: None
• CPC Class Codes: G11B 15/60 Guiding record carrier guiding devices structurally associated with magazines or cassettes G11B23/04
• CPC Class Codes: G11B 15/62 Maintaining desired spacing between record carrier and head
• CPC Class Codes: G11B 15/64 by fluid-dynamic spacing
• CPC Class Codes: G11B 5/00813 magnetic tapes
• 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 5/187 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 5/4893 relative to moving tape

Abstract

An apparatus according to one embodiment includes a module having a tape bearing surface, a first edge, and a second edge. A first tape tenting region extends from the first edge along the tape bearing surface toward the second edge. A transducer is located in a thin film region of the module. A distance from the first edge to the transducer is less than a distance from the second edge to the transducer. The transducer is positioned in the first tape tenting region.

Claims

1. An apparatus, comprising:

a module having a tape bearing surface, a first edge, and a second edge, wherein a first tape tenting region of the tape bearing surface extends from the first edge along the tape bearing surface toward the second edge, the first edge of the tape bearing surface being a first end of the first tape tenting region, a second end of the tape tenting region being positioned between the first and second edges;

a first guide positioned relative to the first edge for inducing tenting of a moving magnetic recording tape over an entirety of the first tape tenting region; and

a transducer in a thin film region of the module, wherein a distance from the first edge to the transducer is less than a distance from the second edge to the transducer, wherein the transducer is positioned in the first tape tenting region.

2. An apparatus as recited in claim 1, wherein the second end of the tape tenting region is located at a location where the tenting terminates at a point of closest approach of the tape to the tape bearing surface after a peak of the tenting.

3. An apparatus as recited in claim 2, wherein the first guide positioned relative to the first edge is positioned to create a first wrap angle and there is no second wrap angle.

4. An apparatus as recited in claim 3, wherein the first wrap angle created by the first guide is in a range of about 0.1 to about 1.5 degrees.

5. An apparatus as recited in claim 2, wherein the first guide is positioned to create an inflection point of the moving magnetic recording tape at a location above the first tape tenting region of the tape bearing surface that is between the transducer and the second edge.

6. An apparatus as recited in claim 1, comprising a second guide positioned relative to the second edge for inducing tenting of a moving magnetic recording tape above a second tape tenting region of the tape bearing surface,

wherein the first guide positioned relative to the first edge is positioned to create a first wrap angle and the second guide is positioned relative to the second edge to create a second wrap angle,

wherein the first and second guides are positioned for inducing the respective tenting whereby resulting tents do not overlap.

7. An apparatus as recited in claim 6, wherein the first wrap angle is not the same as the second wrap angle.

8. An apparatus as recited in claim 6, wherein the second wrap angle is greater than the first wrap angle.

9. An apparatus as recited in claim 6, wherein the second wrap angle is less than the first wrap angle.

10. An apparatus as recited in claim 1, wherein the transducer is a TMR sensor.

11. An apparatus as recited in claim 1, wherein the tape bearing surface is planar.

12. An apparatus as recited in claim 1, wherein the distance from the second edge to the transducer is at least as long as the first tape tenting region of the tape bearing surface.

13. An apparatus as recited in claim 1, comprising a wear coating on a media facing side of the transducer, wherein a peak height is defined between a peak of a tape tent and an upper surface of the coating, wherein a thickness of the coating is in a range of between about 0.5 and about 3 times the peak height.

14. An apparatus as recited in claim 1, wherein a media facing side of the transducer is recessed from the tape bearing surface.

15. An apparatus as recited in claim 1, further comprising:

a drive mechanism for moving a magnetic medium over the module; and

a controller electrically coupled to the transducer.

16. An apparatus, comprising:

a module having a tape bearing surface, a first edge, and a second edge, wherein a first tape tenting region of the tape bearing surface extends from the first edge along the tape bearing surface toward the second edge, the first edge of the tape bearing surface being a first end of the first tape tenting region, a second end of the first tape tenting region being positioned between the first and second edges;

a first guide positioned relative to the first edge for inducing tenting of a moving magnetic recording tape, wherein the location of the tenting is above an entirety of the first tape tenting region, wherein the second end of the tape tenting region is located at a location where the tenting terminates at a point of closest approach of the tape to the tape bearing surface after a peak of the tenting;

a second guide positioned relative to the second edge for inducing tenting of the moving magnetic recording tape, wherein the first guide is positioned relative to the first edge to create a first wrap angle and the second guide is positioned relative to the second edge to create a second wrap angle,

wherein the first wrap angle is not the same as the second wrap angle,

wherein the first and second guides are positioned for inducing the respective tenting whereby resulting tents do not overlap; and

a transducer positioned in the first tape tenting region.

17. An apparatus as recited in claim 16, wherein a first wrap angle created by the first guide is in a range of about 0.1 to about 1.5 degrees.

18. An apparatus as recited in claim 16, wherein the first guide is positioned to create an inflection point of the moving magnetic recording tape at a location above the tape bearing surface that is between the transducer and the second edge.

19. An apparatus as recited in claim 16, wherein the transducer has a reference layer, a free layer, and a spacer layer positioned between the free layer and the reference layer, wherein the free layer is positioned between the reference layer and the first edge.

20. An apparatus as recited in claim 16, wherein a first distance from the first edge to the transducer is less than a second distance from the second edge to the transducer.

21. An apparatus as recited in claim 20, wherein the second distance from the second edge to the transducer is at least as long as the first tape tenting region of the tape bearing surface.

22. An apparatus as recited in claim 16, wherein the transducer is a TMR sensor.

23. An apparatus as recited in claim 16, wherein a media facing side of the transducer is recessed from the tape bearing surface.

24. An apparatus as recited in claim 16, comprising a wear coating on the tape bearing surface.

25. An apparatus as recited in claim 16, further comprising:

a drive mechanism for moving a magnetic medium over the module; and

a controller electrically coupled to the transducer.