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Non-Magnetic Gap Fabrication

IP.com Disclosure Number: IPCOM000097944D
Original Publication Date: 1961-Oct-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Totta, PA: AUTHOR

Abstract

The process forms a unitary structure comprising two magnetic bodies separated by a very thin non-magnetic spacer. The resulting structure is suitable for magnetic recording and reproducing heads. The process includes the steps of: 1. Depositing a very thin film of non-magnetic material on one planar surface of each of two magnetic bodies; 2. Placing the planar surfaces, with deposited film, together under pressure; and 3. Heating sufficiently to cause diffusion bonding between the non-magnetic thin films.

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Non-Magnetic Gap Fabrication

The process forms a unitary structure comprising two magnetic bodies separated by a very thin non-magnetic spacer. The resulting structure is suitable for magnetic recording and reproducing heads. The process includes the steps of:
1. Depositing a very thin film of non-magnetic material on one planar surface of each of two magnetic bodies;
2. Placing the planar surfaces, with deposited film, together under pressure; and
3. Heating sufficiently to cause diffusion bonding between the non-magnetic thin films.

Step 1 is accomplished by vapor deposition or deposition from metal solution. The non-magnetic material is either the same on both planar surfaces, or is different on each surface to give a binary combination. A binary combination of precious metals such as gold, platinum, palladium or silver is desirable, because heating can be effected in air without oxidation. Also, the bonding is more rapid and complete.

To enhance the adhesion of the thin film to the magnetic bodies, step 1 can be preceded by depositing a flash of reactive metal, such as titanium or zirconium, on the planar surfaces.

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