Patent ID: 6013362
Filing Date: 2000-01-11
Classification: F16F,G11B,Y10S,Y10T

Abstract:
A hard disc drive comprising:a hard disc drive body,a substrate, anda soundproof material comprising a compressible porous member which comprises a foam wherein:(1) an air permeation amount based on the pressure difference of 2.039.times.1/10.sup.4 mmH.sub.2 O is from 1.times.1/10.sup.10 to 2.times.1/10.sup.2 cc/cm.sup.2 /second,(2) at least 30% of cells of the foam have an open cell structure;(3) the foam has a foaming ratio of 3 to 20 times; and(4) the foam contains EPDM, interposed between the hard disc body and the substrate.