Damped disc drive assembly, and method for damping disc drive assembly
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United States of America Patent
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Jun 24, 2008
Grant Date -
Jul 26, 2007
app pub date -
Apr 2, 2007
filing date -
Nov 3, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A disc drive assembly is provided including a head disc assembly, a housing having a base and a cover cooperating with one another to form a chamber in which the head disc assembly is housed, and a damper structure in operative association with the housing for dampening noise and/or vibration emanated from the head disc assembly. The damper structure includes a viscoelastic damper layer and a continuous, polymeric constraining layer intimately contacting and encasing the viscoelastic damper layer. The constraining layer has a greater stiffness and higher modulus of dynamic shearing elasticity than the viscoelastic damper layer, and is molded from a high density filler and a moldable compound that is immiscible with the viscoelastic damper layer to provide a discrete interface between the constraining layer and the viscoelastic damper layer.
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