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Taperless Step Slider

IP.com Disclosure Number: IPCOM000122769D
Original Publication Date: 1998-Jan-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Dorius, LK: AUTHOR [+4]

Abstract

In high density/capacity magnetic data storage devices, such as hard disk drives, it is desirable to have high performance sliders with reduced size and better take off characteristics. In the IBM tri-rail ABS design, a taper is the front end is required to facilitate the take-off. However, it is found that with decreasing slider sizes, it is difficult to produce a consistent taper dimension.

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Taperless Step Slider

In high density/capacity magnetic data storage devices, such as hard
disk drives, it is desirable to have high performance sliders with
reduced size and better take off characteristics.  In the IBM
tri-rail ABS design, a taper is the front end is required to
facilitate the take-off.  However, it is found that with decreasing
slider sizes, it is  difficult to produce a consistent taper
dimension.

      It was found that instead of having a taper at the slider front
end to facilitate take-off, a well defined step can do a much better
job.  By using an identical ABS design, we have demonstrated that a
0.7 um step which extends to 700 um from the front end can
out-perform taper f.

      It was shown that this taperless step slider flies as well as
the taper slider with identical fly height versus disk velocity.
With its small positive (380 micro-radian) static pitch angle, it
takes off  about twice as fast as the original taper slider under
identical conditions.  This fast take-off behavior greatly reduces
damage to the  disk surface during the sliding before take-off.  This
results in much  improved contact-start-stop performance, and better
HDI durability.

      Due to its positive static pitch angle, the step slider rests
on the disk with the step edge and the rear end of the slider.  In
contrast, the taper slider rests on the disk with almost the entire
air-bearing surface.  The smaller contact area of the step slider
greatly r...