Disk drive suspension having dual vibration damper
AssigneeMagnecomp Corporation
InventorsPeter Hahn, Steve Misuta
Life of this patent
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Abstract
A vibration damper for a suspension has two different viscoelastic layers and two different constraint layers. The two viscoelastic layers can be tailored to have different properties, including different viscosities and/or peak vibration frequency damping at different frequencies. The vibration damper exhibits improved vibration damping as compared to a single layer damper having the same overall thickness at critical frequencies.
Claims20
A disk drive suspension having a vibration damper, the vibration damper comprising:
- a first viscoelastic layer affixed to a load beam of the suspension on a top side of the load beam;
- a second viscoelastic layer affixed over the first viscoelastic layer;
- and
- a constraint layer affixed over the second viscoelastic layer;
- wherein the first viscoelastic layer, the second viscoelastic layer, and the constraint layer are vertically arranged relative to one another and are all located on the top side of the load beam.
A disk drive suspension having a vibration damper, the vibration damper comprising:
- a first viscoelastic layer affixed to a load beam of the suspension on a top side of the load beam;
- a second viscoelastic layer affixed over the first viscoelastic layer;
- a constraint layer defining a first constraint layer affixed over the second viscoelastic layer, the first constraint layer being disposed between the first and second viscoelastic layers;
- and
- a second constraint layer affixed over the second viscoelastic layer.
A disk drive suspension having a dual vibration damper affixed thereto, the dual vibration damper comprising:
- a first viscoelastic layer affixed on a top side of the suspension;
- a first constraint layer on the first viscoelastic layer;
- a second viscoelastic layer on the first constraint layer;
- and
- a second constraint layer on the second viscoelastic layer;
- wherein:
- the first viscoelastic layer, the first constraint layer, the second viscoelastic layer, and the second constraint layer are vertically stacked and are all located on the top side of the load beam;
- and
- the first and second constraint layers have a Young's modulus of greater than 1 GPa at 23° C.
A disk drive suspension having a dual vibration damper, the dual vibration damper comprising:
- a first viscoelastic layer;
- a first constraint layer affixed to the first viscoelastic layer;
- a second viscoelastic layer affixed to the first constraint layer;
- and
- a second constraint layer affixed to the first viscoelastic layer;
- wherein:
- the first and second viscoelastic layers comprise first and second viscoelastic materials, respectively, the first and second viscoelastic materials having different viscoelastic properties;
- and
- the first viscoelastic layer, the first constraint layer, the second viscoelastic layer, and the second constraint layer are vertically stacked on a common side of the suspension.
Dependencies are inferred from the claim text.