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Magnetic Heads Using Glass Bonding

IP.com Disclosure Number: IPCOM000038312D
Original Publication Date: 1989-Dec-01
Included in the Prior Art Database: 2005-Jan-31
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Rigby, EB: AUTHOR

Abstract

Glass has been used as a sealant in magnetic heads. Glass can be used as a bonding agent between sections of a magnetic head, even when one of the sections contains thin film metallurgy. Very uniform layers of glass can be deposited onto the sections by sputtering, using a low melting point glass target. The glass thickness is closely controlled. The sections of the magnetic heads with the sputtered glass is placed in an infra-red furnace to heat the pieces to the glass softening temperature in a very short time, generally less than one minute. The thin film metallurgy on the section can withstand high temperatures for periods of not more than that of a very few minutes. Several low temperature glasses are available having a softening point at a temperature below the maximum allowable for the thin film metallurgy.

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Magnetic Heads Using Glass Bonding

Glass has been used as a sealant in magnetic heads. Glass can be used as a bonding agent between sections of a magnetic head, even when one of the sections contains thin film metallurgy. Very uniform layers of glass can be deposited onto the sections by sputtering, using a low melting point glass target. The glass thickness is closely controlled. The sections of the magnetic heads with the sputtered glass is placed in an infra-red furnace to heat the pieces to the glass softening temperature in a very short time, generally less than one minute. The thin film metallurgy on the section can withstand high temperatures for periods of not more than that of a very few minutes. Several low temperature glasses are available having a softening point at a temperature below the maximum allowable for the thin film metallurgy.

The use of infra-red furnace for a short time period avoids the destruction of the thin film metallurgy during the glass melting and bonding sequence.

Disclosed anonymously.

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