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Spherical or Rounded Edges Slider for the Reed Thin Film Head

IP.com Disclosure Number: IPCOM000115793D
Original Publication Date: 1995-Jun-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Santini, H: AUTHOR

Abstract

The main attributes of the contact recording REED type heads are the fabrication of the finished poles (throat height) without need for heads slicing, lapping, and polishing. To produce the finished heads we have to manufacture the heads starting from a suitable release layer. This layer is formed with a plurality of recesses each of a size and depth capable of accommodating the head's poletips.

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Spherical or Rounded Edges Slider for the Reed Thin Film Head

      The main attributes of the contact recording REED type heads
are the fabrication of the finished poles (throat height) without
need for heads slicing, lapping, and polishing.  To produce the
finished heads we have to manufacture the heads starting from a
suitable release layer.  This layer is formed with a plurality of
recesses each of a size and depth capable of accommodating the head's
poletips.

      The poletips are fabricated inside said recesses via
photolithographic methods and metalized via electroplating of NiFe
alloys.  Once the poletips are finished we can proceed with the rest
of the inductive head fabrication such as applying insulation layers,
making conductive Cu coils, and finally making the terminal
metallurgy of leads and connector pads.

      Because of the physical size of the recesses were the poletips
reside and the small size of said pole tips (3-5 um wide 4-8 um long)
the rest of the recess area is filled with the final overcoat
material preferentially Al2O3.  The size of the finished slider
bottom, with its integrally positioned pole tips, is on the order of
20x20 ums.  Due to that size, of the contact pad, any misaligning of
the flexure arm during assembly will demand some time of wear-in
process for the pole tips to be in contact with the disk's surface.
This wear-in is done at expense of debris being generated wearing the
Al2O3 material that comprises all of th...