Browse Prior Art Database

Improved Slanted Conductor Magneto-Resistive Head

IP.com Disclosure Number: IPCOM000117141D
Original Publication Date: 1995-Jun-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Heim, D: AUTHOR [+2]

Abstract

An improved barber-pole type Magneto-Resistive (MR) head is described in which the position of the track does not shift as the sensor is lapped. An embodiment is also described with improved electrical robustness with respect to electrical contact between the head and disk in disk storage application.

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This is the abbreviated version, containing approximately 78% of the total text.

Improved Slanted Conductor Magneto-Resistive Head

      An improved barber-pole type Magneto-Resistive (MR) head is
described in which the position of the track does not shift as the
sensor is lapped.  An embodiment is also described with improved
electrical robustness with respect to electrical contact between the
head and disk in disk storage application.

      It is well known that barber-pole heads in high track density
magnetic storage applications suffer the defect that the track center
of the read element, defined by the slanted lead conductors, shift as
the read element is lapped during fabrication.  [*] describes one
attempt to reduce (but not eliminate) this shift.  Fig. 1 shows an
improvement in which this shift is eliminated.  During fabrication,
an MR film is deposited (Fig. 1a), a patterned exchange layer (for
example, MnFe) is deposited to define the track edges of the finished
sensor (Fig. 1b), and conducting material is then deposited over this
to form the slanted leads characteristic of the barber pole sensor
(Fig. 1c).  There may be magnetic shields present beneath and above
the sensor as is currently practiced in the art.  The finished head
is lapped (approximately to the dashed line in Fig. 1c) to form the
air bearing surface.  As long as point A in Fig. 1c remains outside
the active area of the sensor, defined by the exchange film, the
track profile and center will remain substantially fixed.  Fig. 2

      Fig. 2 shows an embodime...