Browse Prior Art Database

HDD Disk with Slanted Clamp Surface

IP.com Disclosure Number: IPCOM000112572D
Original Publication Date: 1994-Jun-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Harada, Y: AUTHOR [+4]

Abstract

Disclosed is a design for a HDD disk with a slanted ID clamping surface. This invention improves disk shift, disk warpage, and stack height.

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

HDD Disk with Slanted Clamp Surface

      Disclosed is a design for a HDD disk with a slanted ID clamping
surface.  This invention improves disk shift, disk warpage, and stack
height.

      Fig. 2 shows a conventional structure of clamp, disk, and
spacer ring which are positioned in parallel to the axial direction
of the spindle motor.  Therefore, the clamping pressure is
concentrated in the axial direction and reduced in the radial
direction.  The weak radial pressure causes a disk shift, and the
strong axial pressure causes  unnatural warpage on the disk.

      Fig. 1 shows an example of this invention.  In a HDD system,
the disk has a slanted ID clamp surface, and the clamp and spacer
ring are adjusted to the slanted surfaces.  The axial force from the
clamp and the spacer ring is cancelled and the radial force from them
are so worked that it prevents disk shift.  The thinner ID clamp area
reduces the stack height.