Browse Prior Art Database

Material for Hard Disk Drive Enclosure

IP.com Disclosure Number: IPCOM000118463D
Original Publication Date: 1997-Feb-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Kakizaki, Y: AUTHOR [+4]

Abstract

Disclosed is a material for use in a Hard Disk Drive enclosure. A bronze sheet metal used as a cover improves acoustic and thermal stability.

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Material for Hard Disk Drive Enclosure

      Disclosed is a material for use in a Hard Disk Drive
enclosure.  A bronze sheet metal used as a cover improves acoustic
and thermal stability.

      Die-cast aluminum is commonly used for the base of Hard Disk
Drives.  However, the cover is made of sheet metal material in order
to lower the profile and reduce cost.  Sheet metal aluminum or
stainless steel is usually selected for the cover, but both are
different from the  die-cast aluminum in terms of thermal expansion.
The thermal expansion  of brass is very similar to that of die-cast
aluminum and, therefore, the distortion of the drive is minimized.
Also, the thermal transfer ratio of brass is excellent.  In terms of
the acoustic noise of the drive, brass also shows the best results.

      From thermal and acoustic data, it can be concluded that a
sheet metal cover made from brass matches the requirements of the
Hard Disk Drive.