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US 2026/0285744 A1Published application
Ring-shaped object, hard disk drive device, and spacer for hard disk drive
AssigneeHoya Corporation
InventorsMasafumi MIURA, Kazuaki HASHIMOTO
Life of this patent
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Abstract
A ring-shaped object includes a ring-shaped substrate having a first main surface and a second main surface that are opposite to each other, an outer circumferential edge surface, and an inner circumferential edge surface, and a film formed on the entire surface of the ring-shaped substrate. A film thickness of the film on the outer circumferential edge surface is larger than a film thickness of the film on the inner circumferential edge surface.
Claims20
A ring-shaped object comprising:
- a ring-shaped substrate having a first main surface and a second main surface that are opposite to each other, an outer circumferential edge surface, and an inner circumferential edge surface;
- and
- a film formed on the entire surface of the ring-shaped substrate,
- wherein a film thickness of the film on the outer circumferential edge surface is larger than a film thickness of the film on the inner circumferential edge surface.
1 more element
A spacer for a hard disk drive, the spacer comprising:
- a ring-shaped substrate having a first main surface and a second main surface that are opposite to each other, an outer circumferential edge surface, and an inner circumferential edge surface;
- and
- an electrically conductive film formed on the first main surface, the second main surface, the outer circumferential edge surface, and the inner circumferential edge surface of the ring-shaped substrate,
- wherein the ring-shaped substrate is made of a material including glass, and
- a film thickness of the film on the first main surface or a film thickness of the film on the second main surface is larger than a film thickness of the film on the inner circumferential edge surface or a film thickness of the film on the outer circumferential edge surface.
2 more elements
A spacer for a hard disk drive, the spacer comprising:
- a ring-shaped substrate having a first main surface and a second main surface that are opposite to each other, an outer circumferential edge surface, and an inner circumferential edge surface;
- and
- a film formed on the first main surface, the second main surface, the outer circumferential edge surface, and the inner circumferential edge surface of the ring-shaped substrate,
- wherein the ring-shaped substrate is made of a material including glass,
- the film is an electrically conductive film, and
- a film thickness of the film on the first main surface or a film thickness of the film on the second main surface is larger than a film thickness of the film on the inner circumferential edge surface or a film thickness of the film on the outer circumferential edge surface.
3 more elements
Dependencies are inferred from the claim text.