Browse Prior Art Database

Patterned Substrate for Improved Slider Fabrication

IP.com Disclosure Number: IPCOM000106288D
Original Publication Date: 1993-Oct-01
Included in the Prior Art Database: 2005-Mar-20
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Ju, K: AUTHOR [+4]

Abstract

Disclosed is a precision molding/filling technique as an alternative method to the conventional manufacturing procedure for sliders, the devices which contain magnetic recording heads for disk drives. In this proposed approach, the recording head and air bearing surface (ABS) are built up from the same surface of a substrate, and the subsequent expensive lapping and machining processes used in the conventional procedures are eliminated. The method permits the patterning of an ABS with more complex topological features, having the intrinsic dimensional precision associated with photolithography, and controllable roughness and crown/camber. Some variations of this approach have been proposed earlier [1,2].

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Patterned Substrate for Improved Slider Fabrication

      Disclosed is a precision molding/filling technique as an
alternative method to the conventional manufacturing procedure for
sliders, the devices which contain magnetic recording heads for disk
drives.  In this proposed approach, the recording head and air
bearing surface (ABS) are built up from the same surface of a
substrate, and the subsequent expensive lapping and machining
processes used in the conventional procedures are eliminated.  The
method permits the patterning of an ABS with more complex topological
features, having the intrinsic dimensional precision associated with
photolithography, and controllable roughness and crown/camber.  Some
variations of this approach have been proposed earlier [1,2].

      Molding material on the substrate is first shaped with
lithographic processes.  More than one layer of material can be used
to create complex topography.  This molding pattern defines the ABS
pattern, including positive or negative air bearings, step taper and
isolated points designed for primary disk contact.  Once this
reworkable pattern is satisfactory, a sacrificial release layer is
then deposited on the molding.  (The sacrificial material may be
placed below, as well as above, the aforementioned release material.)
The slider body material is then deposited, which replicated the
shape of the molding.  A controlled roughness to the ABS surface is
also obtainable with this process.  It is...