Back to results
US 11,238,895 B2Granted
Spacer and hard disk drive apparatus
AssigneeHoya Corporation
InventorMasao Takano
Life of this patent
Estimating the term…
Abstract
A ring-shaped spacer is to be arranged in contact with a magnetic disk in a hard disk drive apparatus. A maximum height surface roughness Rz of an outer circumferential edge surface of the spacer is at least 1.5 μm, and the spacer is made of amorphous glass.
Claims20
A ring-shaped spacer to be arranged in contact with a magnetic disk in a hard disk drive apparatus,
- wherein a maximum height surface roughness Rz of an outer circumferential edge surface of the spacer is at least 1.5 μm,
- the spacer is made of amorphous glass, and
- a skewness of the outer circumferential edge surface is not larger than 1.2.
A hard disk drive apparatus comprising:
- a ring-shaped spacer arranged in contact with a magnetic disk in the hard disk drive apparatus,
- wherein a maximum height surface roughness Rz of an outer circumferential edge surface of the spacer is at least 1.5 μm,
- the spacer is made of amorphous glass, and
- a skewness of the outer circumferential edge surface is not larger than 1.2.
1 more element
Dependencies are inferred from the claim text.