Browse Prior Art Database

SILICON-SEALED, THIN-FILM MAGNETIC HEAD IMAGE BAR

IP.com Disclosure Number: IPCOM000025300D
Original Publication Date: 1984-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 85K

Publishing Venue

Xerox Disclosure Journal

Abstract

A long standing problem of wear in both the magnetic recording head and tape plagues the magnetic recording industry because wear severely limits the life of these systems. Additional wear problems arise when magnetic tape is used as a transfer medium for toner developed magnetic latent images. In this case, the recording heads suffer not only the frictional sliding contact of the magnetic tape, but also abrasion from residual toner particles that are not removed by the tape cleaning system. Since thin-film magnetic recording heads are composed of dissimilar materials, the wear problem is particularly severe at the various interfaces between different materials.

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XEROX DISCLOSURE JOURNAL

SILICON-SEALED, THIN-FILM MAGNETIC Proposed Classification HEAD IMAGE BAR
Cl. U.S. Michael R. Campanelli 29/603

Int. Cl. G1 lb 5/42

FIG. 3

Volume 9 Number 4 July/August 1984 235

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SILICON-SEALED, THIN-FILM MAGNETIC HEAD IMAGE BAR fCont'd)

A long standing problem of wear in both the magnetic recording head and tape plagues the magnetic recording industry because wear severely limits the life of these systems. Additional wear problems arise when magnetic tape is used as a transfer medium for toner developed magnetic latent images. In this case, the recording heads suffer not only the frictional sliding contact of the magnetic tape, but also abrasion from residual toner particles that are not removed by the tape cleaning system. Since thin-film magnetic recording heads are composed of dissimilar materials, the wear problem is particularly severe at the various interfaces between different materials.

The wear problem is dramatically reduced when the prior art device of Figure 1 is processed in accordance with Figures 2 and 3. All of the Figures are schematic, cross-sectional elevation views of a thin-film magnetic head image bar 10. In Figure 1, linear arrays of thin film heads I?, nominally 20 mils thick, are precisely mounted in groves 14 on rounded silicon support structure 16. The recording heads 12 are fixed in position by an adhesive 18. The heads are fabricated on silico...