Back to results
US 5,639,517 AGranted
Process for the production of thin films having optical properties
AssigneeCommissariat a l'Energie Atomique
InventorsHerve Floch, Philippe Belleville
Life of this patent
Estimating the term…
Abstract
A method is provided for fabricating thin films having various optical properties is provided. The disclosed method includes preparing a colloidal suspension and depositing the suspension on a substrate using a coating cylinder. The disclosed method finds particular utility in the area of manufacturing dielectric mirrors and non-reflecting films.
Claims17
A process for coating of at least one thin film having optical properties, and comprising:
- preparing at least one colloidal suspension comprising colloids giving said optical properties dispersed in a solvent, said colloidal suspension having a viscosity between 1 and 5 mPa.s,
- placing a substrate to be covered with the thin film on a support,
- introducing said colloidal suspension under pressure into a coating cylinder,
- displacing said cylinder in translation and at constant speed below a surface to be treated of the substrate, so that a meniscus of the colloidal suspension formed on a periphery of the coating cylinder permits deposition of a colloidal thin film on the surface of said substrate,
- also displacing in translation after passage of the coating cylinder below the surface of the substrate for depositing the thin film onto the substrate, a mask, parallel to the plane of the surface of the substrate,
- allowing the thus covered substrate to dry.
3 more elements
Dependencies are inferred from the claim text.