Method for manufacturing glass spacer, 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 method for manufacturing a ring-shaped glass spacer to be arranged in contact with a magnetic disk in a hard disk drive device includes processing for forming a film on the surface of a glass spacer main body, which is the base of the glass spacer. In the processing, the film is formed by passing the glass spacer main body through a location where the components of the film are in a spray state while an outer circumferential edge surface of the glass spacer main body is being rotated in a circumferential direction thereof.
Claims11
A ring-shaped glass spacer to be arranged in contact with a magnetic disk in a hard disk drive device,
- wherein the entire surface that includes a main surface and an edge surface of the glass spacer is covered by a film that contains at least one of tin oxide, zinc oxide, and titanium oxide, and
- the thickness of the film on the edge surface of the glass spacer is larger than the thickness of the film on the main surface of the glass spacer.
Dependencies are inferred from the claim text.