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Roll Tolerant Air Bearing Slider with Converging Rails

IP.com Disclosure Number: IPCOM000122790D
Original Publication Date: 1998-Jan-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Zhu, L: AUTHOR

Abstract

Illustrated in the Figure is a three-rail slider for use in a linear actuator disk drive. A feature of the disclosed slider is that it is less likely to contact the disk with the slider experiences a crash stop impact. The design accomplishes this result in two ways. First, the angled rails decrease the skew sensitivity of the slider. As the slider approaches the crash stop at relatively high speeds, the vector sum of the disk's motion with the high radial velocity of the slider results in a vector that is skewed from the normal axes of the slider. This is equivalent of skewing the air flow beneath the slider. Consequently, a skew sensitive slider would experience a large change in flying height and possibly contact the disk.

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Roll Tolerant Air Bearing Slider with Converging Rails

      Illustrated in the Figure is a three-rail slider for use in a
linear actuator disk drive.  A feature of the disclosed slider is
that it is less likely to contact the disk with the slider
experiences a crash  stop impact.  The design accomplishes this
result in two ways. First,  the angled rails decrease the skew
sensitivity of the slider.  As the slider approaches the crash stop
at relatively high speeds, the vector sum of the disk's motion with
the high radial velocity of the slider results in a vector that is
skewed from the normal axes of the slider.  This is equivalent of
skewing the air flow beneath the slider.  Consequently, a skew
sensitive slider would experience a large change in flying height and
possibly contact the disk.  Therefore, the decrease in skew
sensitivity of the disclosed design results in better crash stop
performance.

      The second way the slider design reduces the likelihood of disk
contact is by reducing the probability that a side rail will contact
the disk during the high roll conditions sometimes experienced during
a crash stop impact.  Without roll, the lowest flying point is
normally the trailing end of the center rail.  During high roll
conditions, the  lowest point moves to one of the side rails.  By
shortening the side rails and angling them inward, the disclosed
design reduces the chance  that a side rail will contact the disk.