Browse Prior Art Database

Additional Insulator Without Increasing Gap

IP.com Disclosure Number: IPCOM000119214D
Original Publication Date: 1991-Jan-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Denison, E: AUTHOR [+3]

Abstract

An additional thin film insulator is deposited over the magnetoresistive (MR) layer of a head without increasing the magnetic gap length. After the deposition of the conductor legs and before the lift-off process, an additional layer of insulation is deposited.

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This is the abbreviated version, containing approximately 99% of the total text.

Additional Insulator Without Increasing Gap

      An additional thin film insulator is deposited over the
magnetoresistive (MR) layer of a head without increasing the magnetic
gap length.  After the deposition of the conductor legs and before
the lift-off process, an additional layer of insulation is deposited.

      Figure 1 shows an MR element 10 with its conductor legs 12 and
14 deposited in electrical connection to the MR element 10.  The
additional layer of insulation 16 is shown in dotted lines on Figure
1 covering the conductor legs 12 and 14.

      Figure 2 shows a cross-section of conductor leg 12 of Figure 1
taken along line 2-2.  An insulator layer 18 of alumina, for
instance, is shown deposited on a substrate 20 of ferrite material.
The MR element 10 is deposited on the insulating layer 18. The mask
of photoresist shown at reference numeral 22 is deposited and formed
in the usual fashion.  The conductor material is deposited to form
the conductor leg 12.  The conductor material is also deposited onto
the photoresist mask 22 as shown at reference numeral 24.  Before the
resist material is removed by a lift-off process, for instance, an
additional layer of insulation is deposited to form insulation layer
16.  The insulation will also be deposited onto the conductor
material of reference numeral 26. Photoresist 22, as well as layer 24
and 26, will be removed in a proceeding process, leaving the
insulation layer 16 only covering the conductor le...