Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Disk Clamp with Spot Facing under Screw Surface

IP.com Disclosure Number: IPCOM000118942D
Original Publication Date: 1997-Sep-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 4 page(s) / 52K

Publishing Venue

IBM

Related People

Nakamoto, T: AUTHOR

Abstract

Disclosed is a disk clamp which has spot facing under a screw contact surface.

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

Disk Clamp with Spot Facing under Screw Surface

      Disclosed is a disk clamp which has spot facing under a screw
contact surface.

      Disk warpage affects the head flying height of a Hard Disk
Drive.  This affect is one of the big parameters of read / write
performance and reliability.

      Disks are mounted on the spindle motor and fixed by the disk
clamp with screws (Fig. 1).

      Fig. 2 shows the current disk clamp design.  Fig. 2-1 shows the
contact surface when the screw is fastened.  In this case, the strain
by fastening the screw is conveyed to the disk.  The biggest strain
is the distributed around marked A area.

      Fig. 3 shows the new clamp design which has a spot facing area
near the disk.  With this method, disk modulation could be decreased,
as shown in Fig. 4.