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Machinable, High Pitch Angle Slider Design Reduced Probability of Taper Debris Accumulation

IP.com Disclosure Number: IPCOM000111835D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 59K

Publishing Venue

IBM

Related People

Deckert, K: AUTHOR [+3]

Abstract

To improve the flying height stability of the slider it is important to have a higher pitch angle. In the prior art this high pitch angle at low slider-disk spacing has been achieved by using shaped rails. This necessitates use of lithographic etching techniques to manufacture these sliders. Also it has been shown that in presence of particulate contamination, the contaminants grow as whiskers on the trailing end of the slider rails. These whiskers fall off and get trapped in the tapered area of the slider rail. This decreases the pitch angle of the slider and adversely affects its reliability

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Machinable, High Pitch Angle Slider Design Reduced Probability of
Taper Debris Accumulation

      To improve the flying height stability of the slider it is
important to have a higher pitch angle.  In the prior art this high
pitch angle at low slider-disk spacing has been achieved by using
shaped rails.  This necessitates use of lithographic etching
techniques to manufacture these sliders.  Also it has been shown that
in presence of particulate contamination, the contaminants grow as
whiskers on the trailing end of the slider rails.  These whiskers
fall off and get trapped in the tapered area of the slider rail.
This decreases the pitch angle of the slider and adversely affects
its reliability

      In Fig. 1a and Fig. 1b we disclose new air bearing designs,
which have the following preferred features.  In Fig. 1a a short rail
with leading tapered section (a.1) is located at the center of the
leading edge, with two short rails (a.2 and a.3) at the sides of the
trailing edge of the slider.  The center rail with tapered section
provides lift during the take off and sets the flying pitch angle of
the slider.  The rear rails act as plane wedge bearing.  The magnetic
transducers can be located at the trailing ends of these two rails.
In Fig. 1b two short rails (b.1 and b.2) with leading tapered
sections are located at the sides of the leading edge of the slider.
A single short flat rail (b.3) is located at the center of the
trailing edge of the slider.  A magne...