Method of making magnetically-shielded write transducers

Patent metadata

Field	Value
Publication number	US-11270722-B2
Application number	US-201815982857-A
Country	US
Kind code	B2
Filing date	May 17, 2018
Priority date	Oct 13, 2009
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

A method according to one embodiment includes forming at least two write transducers for writing to a magnetic medium, the at least two write transducers being positioned adjacent each other and aligned along a line; and forming a shield structure having shields adjacent at least three sides of each of the at least two write transducers, the shields being formed of a magnetically-permeable material.

First claim

What is claimed is:

1. A method, comprising:
forming at least five write transducers for writing to a magnetic medium, the at least five write transducers being positioned adjacent each other and aligned along a line such that each write transducer is positioned to write a unique data track; and
forming a thin film shield structure adjacent the write transducers, the shield structure having shields formed in situ adjacent at least three sides of each of the at least five write transducers, the shields being formed of a magnetically-permeable material.

2. A method as recited in claim 1 , wherein one of the shields of the shield structure is a common shield between an immediately-adjacent two of the at least five write transducers.

3. A method as recited in claim 1 , wherein the shield structure has shields adjacent five sides of at least one of the write transducers.

4. A method as recited in claim 1 , wherein one of the shields of the shield structure is an upper shield, the upper shield being part of a continuous layer extending across magnetic yokes of the at least five write transducers.

5. A method as recited in claim 4 , wherein another of the shields of the shield structure is a lower shield, wherein the lower shield is a continuous layer extending across the magnetic yokes of the at least five write transducers.

6. A method as recited in claim 1 , wherein one of the shields of the shield structure is a lower shield, wherein the lower shield is a continuous layer extending across magnetic yokes of the at least five write transducers.

7. A method as recited in claim 1 , wherein one of the shields of the shield structure is an upper shield, wherein the upper shield has separate segments formed above magnetic yokes of the at least five write transducers.

8. A method as recited in claim 7 , wherein one of the shields of the shield structure is a lower shield, wherein the lower shield has separate segments formed below the magnetic yokes of the at least five write transducers.

9. A method as recited in claim 7 , wherein the separate segment formed above the magnetic yoke of one of the at least five write transducers is magnetically connected to the separate segment formed above the magnetic yoke of an adjacent one of the at least five write transducers.

10. A method as recited in claim 1 , wherein one of the shields of the shield structure is a lower shield, wherein the lower shield has separate segments formed below magnetic yokes of the at least five write transducers.

11. A method as recited in claim 10 , wherein the separate segment formed below the magnetic yoke of one of the at least five write transducers is magnetically connected to the separate segment formed below the magnetic yoke of an adjacent one of the at least five write transducers.

12. A method as recited in claim 1 , wherein none of the shields of the shield structure is a common shield between an immediately-adjacent two of the at least five write transducers.

13. A method as recited in claim 1 , wherein the shield structure has shields adjacent four sides of at least one of the write transducers.

14. A method as recited in claim 1 , wherein the at least five write transducers have a media-facing side, wherein at least some of the shields are recessed from a plane extending across the media facing side of the write transducers.

15. A method as recited in claim 1 , wherein the at least five write transducers have a media facing side, wherein at least some of the shields abut or traverse a plane extending across the media facing side of the write transducers.

16. A method as recited in claim 1 , wherein at least one of the shields has an insulative interruption therein.

17. A method as recited in claim 1 , wherein upper and lower shields of the shield structure are magnetically connected by a via of magnetic material.

18. A method as recited in claim 1 , wherein all portions of upper and lower shields of the shield structure are recessed from a plane extending across a media facing side of the write transducers.

19. A method, comprising:
forming at least two write transducers for writing to a magnetic medium, the at least two write transducers being positioned adjacent each other and aligned along a line; and
forming a thin film shield structure having shields adjacent at least three sides of each of the at least two write transducers, the shields being formed of a magnetically-permeable material,
wherein the write transducers include write coils, wherein at least one of the shields of the shield structure includes a cutout for one of the write coils,
wherein the one of the write coils extends into the cutout.

20. A method, comprising:
forming at least two write transducers for writing to a magnetic medium, the at least two write transducers being positioned adjacent each other and aligned along a line; and
forming a shield structure having shields adjacent at least three sides of each of the at least two write transducers, the shields being formed of a magnetically-permeable material,
wherein upper and lower shields of the shield structure are magnetically connected by a via of magnetic material.

Assignees

• IBM

Inventors

• Biskeborn Robert G
• Herget Philipp

Classifications

• G11B5/0083 Primary

  for parallel information processing, e.g. PCM recording · CPC title

• Y10T29/49021

  Magnetic recording reproducing transducer [e.g., tape head, core, etc.] · CPC title

• G11B5/115 Primary

  Shielding devices arranged between heads or windings ({G11B5/265} , G11B5/29 take precedence) · CPC title