Method for producing thin layers
AssigneesCentre National de la Recherche Scientifique (CNRS), Universite De Strasbourg
InventorsGabriela Popa, Gero Decher, Fouzia Boulmedais, Olivier Felix, Pierre Schaaf, Jean-Claude Voegel, Joseph Hemmerle, Peng Zhao
Life of this patent
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Abstract
The invention relates to a method for providing organic, semi-organic, mineral, inorganic and hybrid thin layers and thin layers containing nanoparticles, by simultaneous or alternate spraying of solutions of reactive partners (that is polymer/polymer interacting by hydrogen bonding, polyelectrolyte/small oligo-ion, inorganic compounds, etc.) on the surface of a solid substrate.
Claims20
Method for the continuous deposition on a substrate of a thin homogeneous layer of a product obtained from at least two reactive partners, characterised in that it involves the:
- simultaneous continuous spraying, or
- alternate continuous spraying of two reactive partners of inorganic nature, on said substrate,
- using separate sprayers, of at least two liquids each containing one of the reactive partners or a mixture thereof, such that clouds of droplets are produced containing droplets of micro and nanometric size which interact together mainly at the level of a liquid film of controlled thickness comprised between 0.1 μm and 100 μm that forms on contact with a free surface of the substrate, and
- wherein the thickness of said thin homogeneous layer of product, formed from said liquid film, is mainly controlled by the duration of said continuous spraying, except where two reactive partners are of polymer nature, interact by electrostatic interactions, and are deposited by simultaneous spraying;
- wherein the sprayers comprise nozzles arranged so that spraying jets of the liquids from the nozzles arrive at the surface of the substrate along a direction essentially orthogonal with respect to the latter.
Method for the continuous deposition on a substrate of a thin homogeneous layer of a product obtained from at least two reactive partners, characterised in that it involves the:
- simultaneous continuous spraying, or
- alternate continuous spraying of two reactive partners of inorganic nature, on said substrate,
- using separate sprayers, of at least two liquids each containing one of the reactive partners or a mixture thereof, such that clouds of droplets are produced containing droplets of micro and nanometric size which interact together mainly at the level of a liquid film of controlled thickness comprised between 0.1 μm and 100 μm that forms on contact with a free surface of the substrate, and
- wherein the thickness of said thin homogeneous layer of product, formed from said liquid film, is mainly controlled by the duration of said continuous spraying, except where two reactive partners are of polymer nature, interact by electrostatic interactions, and are deposited by simultaneous spraying;
- wherein the sprayers comprise nozzles;
- wherein a screen is provided with an opening calibrated to select central parts of spraying jets from the nozzles and avoid the contamination of the surface by the edges of the jets.
Method for the continuous deposition on a substrate of a thin homogeneous layer of a product obtained from at least two reactive partners, characterised in that it involves the:
- simultaneous continuous spraying, or
- alternate continuous spraying of two reactive partners of inorganic nature, on said substrate,
- using separate sprayers comprising nozzles, of at least two liquids each containing one of the reactive partners or a mixture thereof, such that clouds of droplets are produced containing droplets of micro and nanometric size which interact together mainly at the level of a liquid film of controlled thickness comprised between 0.1 μm and 100 μm that forms on contact with a free surface of the substrate, and
- wherein the thickness of said thin homogeneous layer of product, formed from said liquid film, is mainly controlled by the duration of said continuous spraying, except where two reactive partners are of polymer nature, interact by electrostatic interactions, and are deposited by simultaneous spraying;
- wherein the sprayers comprise nozzles;
- wherein a screen is interposed between the nozzle(s) and an overlapping point of spraying jets from the nozzles provided with at least one opening passing alternatively in front of the spraying jets to control the collisions and interactions of sprayed droplets.
Dependencies are inferred from the claim text.