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Multielement Magnetic Head

IP.com Disclosure Number: IPCOM000073684D
Original Publication Date: 1971-Jan-01
Included in the Prior Art Database: 2005-Feb-22
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Haertlein, EE: AUTHOR

Abstract

This multielement magnetic head structure comprises a glass-bonded, pole-tip assembly 10, a ferrite back bar 25 and a terminal strip 30. The magnetic ferrite pole-tip assembly 10 comprises a ferrite block 11 which forms the common leg of the magnetic circuits. Bottom surface 16 is the air-bearing surface. It is provided with a leading taper 12 and is angled rearwardly upwardly to provide the necessary stability when the head is maintained in air-bearing relationship to a disk. Protruding rearwardly from the surface 15 of block 11 is a plurality of separated ferrite pole tips 18. A nonmagnetic bonding element or glass 20 fills the spaces between the pole tips 18 and also bonds the pole tips 18 to the surface 15 of the common leg, block 11.

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Multielement Magnetic Head

This multielement magnetic head structure comprises a glass-bonded, pole- tip assembly 10, a ferrite back bar 25 and a terminal strip 30. The magnetic ferrite pole-tip assembly 10 comprises a ferrite block 11 which forms the common leg of the magnetic circuits. Bottom surface 16 is the air-bearing surface. It is provided with a leading taper 12 and is angled rearwardly upwardly to provide the necessary stability when the head is maintained in air-bearing relationship to a disk. Protruding rearwardly from the surface 15 of block 11 is a plurality of separated ferrite pole tips 18. A nonmagnetic bonding element or glass 20 fills the spaces between the pole tips 18 and also bonds the pole tips 18 to the surface 15 of the common leg, block 11. As shown, the glass completely fills the space between the common leg and the separated pole tips, thus forming the glass-filled gap 21 and also providing substantial rigidity and ruggedness.

The comb-shaped ferrite back bar 25 includes a plurality of fingers 26 extending rearwardly from base 27, with each finger 26 having a greater width than that of the corresponding pole tips 18. The back bar has a lapped bottom surface 13 and functionally closes the magnetic circuit when clamped against the lapped top surface 14 of pole-tip assembly 10. A coil 28 is prewound and placed over each finger 26 with its leads 29 fitted through the groove in the base 27 of the back bar 25 and soldered to conductors dispo...