Patent ID: 6456455
Filing Date: 2002-09-24
Classification: B32B,F16F,G11B

Abstract:
A disk drive assembly comprising:(a) a disk drive, the disk drive having a spindle; (b) a rotatable storage article positioned such that the spindle extends through a through hole in the rotatable storage article; (c) a spacer article, wherein the spacer article is positioned such that the spindle extends through a through hole in the spacer article, wherein the spacer article is positioned adjacent to and in contact with the rotatable storage article; wherein the spacer article comprises: a laminate having a through hole, the laminate comprising: (i) an upper substrate layer and a lower substrate layer; (ii) a layer of vibration damping material comprising a viscoelastic material positioned between said upper and lower substrate layers; wherein the storage modulus of each substrate layer is greater than that of the viscoelastic material in the vibration damping material layer; wherein at least one deformation area is present in said spacer wherein a deformation area is an area of the spacer article wherein at least one substrate layer is plastically deformed such that the upper and lower substrate layers are touching or positioned closer to each other than in an area of the spacer article in which none of the substrates are plastically deformed; wherein, in the layer of vibration damping material, within at least a 0.5% area of the deformation area, the vibration damping material is non-existant or, if present has a mass that is 90% or less than the average mass of the vibration damping material layer of an equal area in an area of the spacer article which is not in a deformation area; and wherein the spacer article has a flatness such that it does not cause any warpage, kinking, high spots, crimps, dents, bends, or deflections of the rotatable storage article.