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Pole Head for Vertical Recording

IP.com Disclosure Number: IPCOM000060838D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Bassett, RD: AUTHOR

Abstract

A pole head for vertical recording is assembled from a head housing, a head pole piece, a prewound coil and awear pad. Head housing 10 is a ferrite material which has coil groove 11 with coil lead slot 12 and pole piece hole 13. Hole 13 can be drilled all or part way through housing 10. Groove 11, slot 12 and hole 13 can be prepared by laser or ultrasonic machining. Head pole piece 20 is prepared from a ferrite substrate having a bonded nonmagnetic wear resisting tip 21. A film of Co-Zr-Nb is sputtered onto lapped surface 22 and, optionally, a ferrite closure piece 23 is bonded to the sputtered surface. Pole piece 20 is prepared with dimensions to closely fit pole piece hole 13. Wear pad 24, approximately 0.004 inch thick, has a machined hole 25 to allow a close fit of head pole piece 20.

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Pole Head for Vertical Recording

A pole head for vertical recording is assembled from a head housing, a head pole piece, a prewound coil and awear pad. Head housing 10 is a ferrite material which has coil groove 11 with coil lead slot 12 and pole piece hole 13. Hole 13 can be drilled all or part way through housing 10. Groove 11, slot 12 and hole 13 can be prepared by laser or ultrasonic machining. Head pole piece 20 is prepared from a ferrite substrate having a bonded nonmagnetic wear resisting tip
21. A film of Co-Zr-Nb is sputtered onto lapped surface 22 and, optionally, a ferrite closure piece 23 is bonded to the sputtered surface. Pole piece 20 is prepared with dimensions to closely fit pole piece hole 13. Wear pad 24, approximately 0.004 inch thick, has a machined hole 25 to allow a close fit of head pole piece 20. Assembly of the individual units is illustrated. Pole piece 20 and prewound coil 26 are inserted into pole piece hole 13 and coil groove 11, respectively, and are bonded. The tip of pole piece 20 is left extended to be flush with the surface of wear pad 24 which is next bonded. The assembly is then ground and lapped to attain a wear pad thickness of approximately 0.002 inch.

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