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US 8,709,144 B2Granted
Precursor sol of aluminum oxide and method for producing optical member
AssigneeCanon Kabushiki Kaisha
InventorsTomonari Nakayama, Kenji Makino
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Abstract
A precursor sol of aluminum oxide includes a solvent and particles containing a hydrolysate of an aluminum compound and/or a condensate of the hydrolysate, in which the particles have an average particle size of 2.5 nm to 7 nm. A method for producing an optical member includes the steps of feeding the precursor sol of aluminum oxide described above onto a base to form an aluminum oxide film and immersing the aluminum oxide film in hot water with a temperature of 60° C. to 100° C. to form a textured structure comprising aluminum oxide boehmite.
Claims5
A precursor sol of aluminum oxide, comprising:
- a solvent;
- and
- particles containing a hydrolysate of an aluminum compound and/or a condensate of the hydrolysate,
- wherein the particles have an average particle size of 2.5 nm to 7 nm, and
- wherein the solvent contains 50% by weight to 90% by weight of a monohydric alcohol having 5 to 8 carbon atoms and 10% by weight to 50% by weight of a water-miscible solvent having a boiling point of 110° C. to 170° C.
2 more elements
Dependencies are inferred from the claim text.