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US 10,643,648 B2Granted
Anti-reflection data storage medium
AssigneeSeagate Technology LLC
InventorsLi Hong Zhang, Xiong Liu, Swee Chuan Gan
Life of this patent
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Abstract
An anti-reflection storage medium. The anti-reflection storage medium includes a storage layer and a protective overcoat disposed over the storage later. The protective overcoat has a first refractive index value that is matched to a second refractive index value of the storage layer to reduce reflection of incident light applied to the storage medium when data is written to the storage layer of the storage medium.
Claims10
An anti-reflection storage medium comprising:
- a plurality of layers with each one of the plurality of layers having a different refractive index value, the plurality of layers comprising:
- a storage layer that comprises a highest refractive index value of the different refractive index values;
- a protective overcoat layer in direct contact with the storage layer, the protective overcoat layer comprising at least one of magnesium fluoride (MgF2), yttrium fluoride, zinc selenide (ZnSe), and barium fluoride (BaF2);
- and
- a lubricant layer in direct contact with the protective overcoat layer, the lubricant layer having a lowest refractive index value of the different refractive index values;
- and
- the different ones of the plurality of layers stacked in descending order of refractive index value to provide the anti-reflection property of the storage medium.
4 more elements
Dependencies are inferred from the claim text.