Browse Prior Art Database

Clamping Technique of Glass-Substrate Disk

IP.com Disclosure Number: IPCOM000101987D
Original Publication Date: 1990-Oct-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Akiyama, H: AUTHOR [+3]

Abstract

Disclosed is a clamping technique of a glass-substrate disk which is a candidate component for the next generation Hard Disk Drive (HDD). Most important shortcoming of a glass-substrate is the lack of safety and reliability resulted from crack generation or disk slip by the imperfect clamping. Especially, it is very difficult to detect "micro- cracks" by inspections after the disk clamping process. For disks, this is a final process of HDD assembly. The disclosed technique provides a method for preventing microcracks from being generated and for avoiding disk-slip. The clamping technique disclosed here is as follows.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Clamping Technique of Glass-Substrate Disk

       Disclosed is a clamping technique of a glass-substrate
disk which is a candidate component for the next generation Hard Disk
Drive (HDD).  Most important shortcoming of a glass-substrate is the
lack of safety and reliability resulted from crack generation or disk
slip by the imperfect clamping.  Especially, it is very difficult to
detect "micro- cracks" by inspections after the disk clamping
process.  For disks, this is a final process of HDD assembly.  The
disclosed technique provides a method for preventing microcracks from
being generated and for avoiding disk-slip.  The clamping technique
disclosed here is as follows.

      A thin plate made of rubber, plastics, etc. is put on between a
disk and clamping parts/spacers, as shown in the figure.
   1) Rubber deforms easily by its elasticity.  Thus, rubber is a
good buffer material which avoids a stress concentration.  By means
of this, the microcracking is suppressed even in hard-glass material.
2) Rubber can obtain large contact area and high friction coefficient
even for highly smooth glass-substrate. It is effective in avoiding
disk slip.