CPC G11B 17/021 (2013.01) [G11B 5/73921 (2019.05); G11B 23/03 (2013.01)] | 11 Claims |
1. 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.
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