Browse Prior Art Database

Method of Bonding Magnetic Recording Disks to Spindles

IP.com Disclosure Number: IPCOM000111862D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Berg, L: AUTHOR [+2]

Abstract

Magnetic recording disks can be attached to disk drive spindles by adhesively bonding the disk to the spindle hub. An auxiliary clear glass clamp plate is used to facilitate rework. The magnetic recording disk is bonded to the clamp plate, and the clamp plate is attached to the rotating spindle hub. The adhesive bonds attaching the spindle and disk to the clamp plate can be broken by infrared heat or pulsed laser radiation.

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Method of Bonding Magnetic Recording Disks to Spindles

      Magnetic recording disks can be attached to disk drive spindles
by adhesively bonding the disk to the spindle hub.  An auxiliary
clear glass clamp plate is used to facilitate rework.  The magnetic
recording disk is bonded to the clamp plate, and the clamp plate is
attached to the rotating spindle hub.  The adhesive bonds attaching
the spindle and disk to the clamp plate can be broken by infrared
heat or pulsed laser radiation.

      A disk in a single-disk file can be bonded to a spindle via a
clamp plate.  A typical configuration for a small file is shown in
Fig. 1.  The disk is mated to a stepped hub.  An annular clamp plate
with adhesive on one surface is then mated to the hub/disk assembly.
The disk is fixed to the hub through adherence to the clamp plate
which is bonded to a surface on the hub.

      A single disk may also be bonded to a hub using the concept
depicted in Fig. 2.  Here, a line of adhesive on the inner diameter
of the disk bonds it to a glass clamp plate.  The glass clamp plate
is attached to the spindle with a face-to-face adhesive joint.  The
disk is fixed to the hub through adherence to the clamp plate.  Only
the clamp plate is directly bonded to the hub.

      Parts removal can be done by debonding the glass plate from the
hub with a pulsed excimer laser or softening the adhesive with
infrared heat.