Saint-gobain Glass France

Elin Sondergard

Etienne Barthel

Alban Letailleur

Constance Magne

Sébastien Le Roy

Christophe Peroz

Georges Zagdoun

Andriy Kharchenko

Bernard Nghiem

Ronan Garrec

Eddy Royer

Nicolas Chemin

Anne Lelarge

A process for forming an array of irregularities or features that are submicron-size in height and that have a characteristic lateral dimension that is micron- or submicron-size, over a surface of a material, by ion erosion, the process including: supplying the material with a thickness at least equal to 100 nm, the material being a solid hybrid material that includes: a simple oxide or a mixed oxide of one or more elements, an oxide molar percentage in the material being at least 40%; and a species, of a different nature to the one or more elements of the oxide, a molar percentage of the species in the material ranging from 6 mol % up to 50 mol % while remaining below the percentage of the oxide, most of the species having a largest characteristic dimension smaller than 50 nm, optionally heating the hybrid material before the erosion; structuring the surface of the hybrid material with an erosion that lasts less than one hour over an erosion area greater than 1 cm, until the array of features is formed, the structuring optionally being accompanied by heating of the hybrid material.

Method for structuring a surface by means of ion-beam etching, structured surface and uses

A process for forming an array of irregularities or features that are submicron-size in height and that have a characteristic lateral dimension that is micron- or submicron-size, over a surface of a material by reactive-ion etching, the process including: supplying the material with a thickness at least equal to 100 nm, the material being a solid hybrid material that includes: a simple silicon oxide or a mixed silicon oxide, most of the oxides in the case of a mixed oxide being silicon oxide, an oxide molar percentage in the material being at least 40%; and a species, of a different nature to the silicon of the oxide, a molar percentage of the species in the material ranging from 1 mol % or even up to 50 mol % while remaining below the percentage of the silicon oxide, at least most of the species having a largest characteristic dimension smaller than 50 nm, optionally heating the hybrid material before the etching; structuring the surface of the hybrid material, without masking, with etching that lasts less than 30 minutes over an etching area greater than 1 cm, until the array of features is formed, the structuring optionally being accompanied by heating of the hybrid material.

Method for structuring a surface by means of reactive ion-beam etching, structured surface and uses

Method for texturing a substrate having a large surface area

The present invention relates to a process for surface structuring, that is to say, for meaning forming at least one array of patterns with a submillimeter scale characteristic lateral dimension on a flat surface of a product comprising a substrate bearing at least one layer resulting from a sol-gel process, where the structuring is done hot with a hydrolyzed sol layer based on alkoxides and/or halide(s) of at least one metal chosen among Si, Ti, Zr, W, Sb, Hf, Ta, V, Mg, Al, Mn, Co, Ni, Sn, Zn, and Ce with a nonreactive organic group, where the structuring is carried out by contact with a structured mask and exerting pressure as needed, and where the structuring is carried out in a temperature range suited for a sufficient condensation threshold ensuring the thermal hold of the structuring, with a total structuring time less than or equal to two hours. The invention also covers the resulting product.

Process for surface structuring of product having a sol-gel layer, product having a structured sol-gel layer

The subject of the invention is the use of a material composed of a substrate equipped with a coating based on titanium oxide surmounted by a thin hydrophilic layer forming at least one part of the outer surface of said material and that is not composed of titanium oxide, as a material that prevents the deposition of mineral soiling on said outer surface in the absence of water runoff.

Antifouling material and production method thereof

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Cachan, France

Elin Sondergard