Browse Prior Art Database

Joining Procedure for Magnetic Disk Files in Portable Computers

IP.com Disclosure Number: IPCOM000104534D
Original Publication Date: 1993-Apr-01
Included in the Prior Art Database: 2005-Mar-19
Document File: 1 page(s) / 31K

Publishing Venue

IBM

Related People

Doany, F: AUTHOR [+4]

Abstract

Disclosed is a method of joining a glass disk to a hub using light cured epoxy to allow simpler construction of magnetic disk drives with less thickness. This solution has been rejected in the past because the drives have to be reworked if the disk or the heads are bad. Disclosed is a method that can glue the disk to the hub and release it using a pulsed uv excimer laser which will pass through the transparent area on the disk and be absorbed in the epoxy, destroying the bond without harming either the glass disk or the aluminum hub.

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Joining Procedure for Magnetic Disk Files in Portable Computers

      Disclosed is a method of joining a glass disk to a hub using
light cured epoxy to allow simpler construction of magnetic disk
drives with less thickness.  This solution has been rejected in the
past because the drives have to be reworked if the disk or the heads
are bad.  Disclosed is a method that can glue the disk to the hub and
release it using a pulsed uv excimer laser which will pass through
the transparent area on the disk and be absorbed in the epoxy,
destroying the bond without harming either the glass disk or the
aluminum hub.

      The light cured epoxy will have the cross linking material
sensitive to light in the visible range, and it can be made highly
absorbing in the ultraviolet range by loading with a material such as
polyimide which is transparent in the visible range and very highly
absorbing in the ultraviolet range, say at a wavelength of 350 nm.
The glass disk is substantially transparent to light of 350 nm, and
light from a high power pulsed 350 nm excimer laser will pass through
the transparent disk, be absorbed in the expoxy-polyimide material,
and cause the epoxy material to separate from the glass disk.  The
disk or head can be replaced, and the part can be reworked.

Disclosed Anonymously.