Patent ID: 7391589
Filing Date: 2008-06-24
Classification: G11B,Y10T

Abstract:
1. A method for damping a disc drive assembly, comprising: providing a disc drive assembly comprising a head disc assembly and a housing, the head disc assembly comprising a disc having a surface and a track for storage of information, a head for writing and reading information to and from the disc, and an actuator arm for moving the head relative to the surface of the disc, the housing comprising a base and a cover cooperating with one another to form a chamber there between in which at least a portion of the head disc assembly is housed; heat molding a curable compound in a mold cavity of a mold in the presence of a viscoelastic damper layer that is substantially immiscible with the curable compound, and curing the curable compound into a continuous, polymeric constraining layer of a damper structure, the damper structure comprising the constraining layer in intimate contact with and encasing the viscoelastic damper layer, the constraining layer having a greater stiffness and higher modulus of dynamic shearing elasticity than the viscoelastic damper layer; and positioning the damper structure in operative association with the housing to dampen noise and/or vibration resonating from the disc drive assembly.