Glass spacer and hard disk drive device
AssigneeHoya Corporation
InventorsMasafumi Miura, Kazuaki Hashimoto, Naoyuki Higuchi
Life of this patent
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Abstract
A ring-shaped glass spacer is to be arranged in contact with a magnetic disk in a hard disk drive device. A film that contains at least one of tin oxide, zinc oxide, and titanium oxide is formed on each surface of a main surface, and an outer circumferential edge surface, and an inner circumferential edge surface of the glass spacer. The thickness of the film on a center portion of the outer circumferential edge surface of the glass spacer is larger than the thickness of the film on a center portion of the inner circumferential edge surface of the glass spacer.
Claims13
A ring-shaped glass spacer to be arranged in contact with a magnetic disk in a hard disk drive device,
- wherein a film that contains at least one of tin oxide, zinc oxide, and titanium oxide is formed on each surface of a main surface, and an outer circumferential edge surface, and an inner circumferential edge surface of the glass spacer, and
- the thickness of the film on a center portion of the outer circumferential edge surface of the glass spacer is larger than the thickness of the film on a center portion of the inner circumferential edge surface of the glass spacer.
A ring-shaped glass spacer to be arranged in contact with a magnetic disk in a hard disk drive device,
- wherein a film that contains at least one of tin oxide, zinc oxide, and titanium oxide is formed on each surface of a main surface, and an outer circumferential edge surface, and an inner circumferential edge surface of the glass spacer, and
- the thickness of the film on a center portion of the outer circumferential edge surface or a center portion of the inner circumferential edge surface of the glass spacer is larger than the thickness of the film on a center portion of the main surface of the glass spacer.
Dependencies are inferred from the claim text.