Patent ID: 7573674
Filing Date: 2009-08-11
Classification: G11B

Abstract:
1. A disk drive comprising: a drive housing; and a storage disk that is rotatably coupled to the drive housing, the storage disk being susceptible to vibration, the storage disk including (i) a first substrate formed from a first material having a first composition, wherein the first substrate has a first inner surface, (ii) a spaced-apart second substrate formed from a second material having a second composition, wherein the second substrate has a second inner surface, (iii) a damping layer including a viscoelastic material that is positioned at least partially between the first substrate and the second substrate, wherein the damping layer contacts both the first inner surface and the second inner surface, and (iv) a rigid substrate spacer positioned at least partially between the first substrate and the second substrate, the substrate spacer being formed from a third material having a third composition that is different from the first composition and the second composition.