1914 results about "Hydrophobic surfaces" patented technology

Methods of processing films on substrates are provided. In one aspect, the methods comprise treating a patterned low dielectric constant film after a photoresist is removed from the film by depositing a thin layer comprising silicon, carbon, and optionally oxygen and / or nitrogen on the film. The thin layer provides a carbon-rich, hydrophobic surface for the patterned low dielectric constant film. The thin layer also protects the low dielectric constant film from subsequent wet cleaning processes and penetration by precursors for layers that are subsequently deposited on the low dielectric constant film.

Methods for forming silicon dioxide thin films on hydrophobic surfaces are provided. For example, in some embodiments, silicon dioxide films are deposited on porous, low-k materials. The silicon dioxide films can be deposited using a catalyst and a silanol. In some embodiments, an undersaturated dose of one or more of the reactants can be used in forming a pore-sealing layer over a porous material.

The present invention relates to a method of coating fluorocarbon or hydrocarbon on the surface of a workpiece using atmospheric pressure plasma. More particularly, the present invention relates to a method of coating hydrocarbon or fluorocarbon on the surface of a workpiece using plasma generated under atmospheric pressure such that the workpiece can have a hydrophobic or super-hydrophobic surface.The method of coating a surface of a workpiece with fluorocarbon to be hydrophobic or super-hydrophobic according to the present invention comprises the steps of generating first atmospheric pressure glow plasma by supplying a reaction gas into a discharge space formed between a first electrode and a second electrode, the reaction gas containing hydrogen gas, fluorocarbon gas and inert gas, the first and second electrodes being connected to an RF power supply of an atmospheric pressure plasma generator; and approaching the workpiece to the first electrode downstream of a reaction gas flow passing through the discharge space, such that the plasma created in the discharge space is transferred into a space between the first electrode and the workpiece to generate a second atmospheric pressure glow plasma therein, whereby a fluorocarbon coating layer can be formed on the surface of the workpiece.

A vapor escape membrane for use in a heat exchanging device, including a heat pipe or heat sink that runs liquid into a cooling region positioned adjacent to the heat producing device, the vapor escape membrane comprising: a porous surface for removing vapor produced from the liquid in the cooling region, the membrane configured to confine the liquid only within the cooling region. The vapor escape membrane transfers vapor to a vapor region within the heat exchanging device, wherein the membrane is configured to prevent liquid in the cooling region from entering the vapor region. The membrane is configured to include a hydrophobic surface between the membrane and the cooling region, wherein the liquid in the cooling region does not flow through the porous surface. The vapor escape membrane includes a plurality of apertures for allowing vapor to transfer therethrough, each of the apertures having a predetermined dimension.

The present invention is a method of applying Lotus Effect materials as a (superhydrophobicity) protective coating for various system applications, as well as the method of fabricating / preparing Lotus Effect coatings.

Methods are disclosed for coating at least a portion of a hydrophobic surface, including the surfaces of plastics or other polymers. Such methods include the use of a first coating layer and / or region that interacts with the hydrophobic surface, although the formation of a chemical bond between the first coating layer and the hydrophobic surface is not required. Subsequent layers may then interact chemically or non-chemically with at least a portion of the first coating layer and / or region. Such coated surfaces may be part of a device or apparatus, including microfluidic devices.

The present invention relates to absorbent articles which include one or more barrier members comprising a light-weight nonwoven laminate that has been treated with a hydrophobic surface coating intended to render such components impermeable to liquids having relatively low surface tensions.

A self-cleaning surface which has an artificial, at least partially hydrophobic, surface structure containing elevations and depressions, which comprises an at least partially hydrophobic surface formed from structure-forming particles of hydrophobic fumed silica having elevations and depressions ranging in dimensions of 1 to 1000 nm and the particles themselves having an average size of less than 50 μm adhered to the surface by way of a viscous, curable carrier material selected from the group consisting of polyurethane, polyurethane acrylates, silicone acrylates and singly and / or multiply unsaturated (meth)acrylates applied to the surface, which is sufficient to bond the structure forming particles without substantial wetting of the particles by the carrier material while retaining the fissured structure of elevations and depressions of the structure-forming particles in the nanometer range.

The invention relates to a microfluidic device for making a liquid / liquid or gas biphasic system using a first liquid or a gas and a second liquid, non-miscible with each other, the device having a first hydrophobic surface for the second liquid, the first liquid forming a layer (6) on said first hydrophobic surface. The device comprises means for introducing a drop (7) of the second liquid into the layer of first liquid or gas and in contact with said first hydrophobic surface, and means for displacing the drop on said first hydrophobic surface along a determined path, the device having on the path of the drop, at least one wetting defect causing, upon passing of the drop over this defect, failure of the triple line of contact of the drop on the first hydrophobic surface and inclusion of first liquid (8) or gas into the drop.The invention also relates to the associated method.

A hydrophobic surface coating, preferably obtained by chemical vapor deposition, comprises at least an upper thin layer formed by a compound selected from the group consisting of SiCxOy:H with x comprised between 1.4 and 2 and y comprised between 0.8 and 1.4 and SiCx′Ny′:H with x′ comprised between 1.2 and 1.4 and y′ comprised between 0.6 and 0.8, so as to obtain a free surface with a low wetting hysteresis. Such a hydrophobic surface coating can be arranged on the free surface of a microcomponent comprising at least one substrate provided with, an electrode array and particularly suitable for moving drops of liquid by electrowetting on dielectric.

An interconnect structure that includes a dielectric material having a dielectric constant of about 3.0 or less is provided. This low k dielectric material has at least one conductive material having an upper surface embedded therein. The dielectric material also has a surface layer that is made hydrophobic prior to the formation of the noble metal cap. The noble metal cap is located directly on the upper surface of the at least one conductive material. Because of the presence of the hydrophobic surface layer on the dielectric material, the noble metal cap does not substantially extend onto the hydrophobic surface layer of the dielectric material that is adjacent to the at least one conductive material and no metal residues from the noble metal cap deposition form on this hydrophobic dielectric surface.

The present invention is related to a chemical vapor deposition method of depositing layers of materials to provide super-hydrophilic surface properties, or super-hydrophobic surface properties, or combinations of such properties at various locations on a given surface. The invention also relates to electronic applications which make use of super-hydrophobic surface properties, and to biological applications which make use of super-hydrophilic surface properties.

A hydrophobic coating including solid silsesquioxane silicone resins to increase durability is provided. The hydrophobic coating is any composition that increases the contact angle to a surface, preferably glass. The durability of the hydrophobic coating is preferably increased to one and a half years, more preferably three years.

Coating compositions for producing hydrophobic or super-hydrophobic surfaces and olephobic or super-olephobic surfaces, and to processes for producing such surfaces. In particular, the present invention relates to hydrophobic or olephobic powder coatings and their use for transforming surfaces of articles into hard-to-wet and self-cleaning surfaces.

Disclosed is a process for modification of a substrate so as to form an ultrahydrophobic surface on the substrate. Also disclosed are surface-modified substrates that can be formed according to the disclosed processes. The process includes attachment of a multitude of nano- and / or submicron-sized structures to a surface to provide increased surface roughness. In addition, the process includes grafting a hydrophobic material to the surface in order to decrease the surface energy and decrease wettability of the surface. The combination of increase surface roughness and decreased surface energy can provide an ultrahydrophobic surface on the treated substrate.

High resolution ink-jet printing on edible substrates is disclosed in which fat or wax-based edible inks, which contain a colorant, a fat or wax dispersible carrier, and a fat or wax base, are used to produce high resolution images on edibles. The methods utilize a piezoelectric printhead; and the edible products include confectionery pieces having non-planar, hydrophobic surfaces, such as wax-polished sugar shell surfaces, with a printed image thereon having a resolution greater than 100 dpi, preferably greater than 300 dpi.

Articles containing fine-grained and / or amorphous metallic coatings / layers on at least part of their exposed surfaces are imprinted with surface structures to raise the contact angle for water in the imprinted areas at room temperature by equal to or greater than 10°, when compared to the flat and smooth metallic material surface of the same composition.

The present invention relates to personal care compositions, especially those personal care compositions in the form of an article that is a porous, dissolvable solid structure. The article has a hydrophobic surface-resident coating that can provide enhanced deposition efficiency of hydrophobic actives contained therein.

A microfluidic device having durable ultraphobic fluid contact surfaces in the fluid flow channels of the device. The ultraphobic surface generally includes a substrate portion with a multiplicity of projecting regularly shaped microscale or nanoscale asperities disposed in a regular array so that the surface has a predetermined contact line density equal to or greater than a critical contact line density, and so that the ratio of the cross-sectional dimension of the asperities to the spacing dimension of the asperities is less than or equal to 0.1.

A device for displacing a small volume of liquid under the effect of an electric control, including a first substrate with a hydrophobic surface provided with a first electrical conductor, a second electrical conductor positioned facing the first conductor, and a third conductor, forming with the second conductor, a mechanism for analyzing or heating a volume of liquid.

A hydrophobic surface comprising a substrate and a roughened surface structure oriented on the substrate material is provided. The substrate comprises a surface, which is at least partially hydrophobic with a contact angle to liquid of 90° or greater. The roughened surface structure comprises a plurality of asperities arranged in a geometric pattern according to a roughness factor, wherein the roughness factor is characterized by a packing parameter p that equals the fraction of the surface area of the substrate covered by the asperities. The p parameter has a value from between about 0.5 to about 1.

The use of poly(oxyethylene)-poly(oxybutylene) block copolymers in pharmaceutical compositions useful for modifying the surfaces of contact lenses and other medical devices is disclosed. The present invention is based in-part on a discovery that this class of compounds is particularly efficient in wetting hydrophobic surfaces, such as the surfaces of silicone hydrogel contact lenses and other types of ophthalmic lenses. Such compounds are also useful for cleaning purposes. The use of the compounds as surfactants in various types of compositions for treating contact lenses therefore represents a preferred embodiment of the present invention.

Disclosed herein is a device A device of the microelectrode array architecture, comprising: (a) a bottom plate comprising an array of multiple microelectrodes disposed on a top surface of a substrate covered by a dielectric layer; wherein each of the microelectrode is coupled to at least one grounding elements of a grounding mechanism, wherein a hydrophobic layer is disposed on the top of the dielectric layer and the grounding elements to make hydrophobic surfaces with the droplets; (b) a field programmability mechanism for programming a group of configured-electrodes to generate microfluidic components and layouts with selected shapes and sizes; and, (c) a system management unit, comprising: (i) a droplet manipulation unit; and (ii) a system control unit.

The self-cleaning and sterilizing endotracheal and tracheostomy tube may include a combination of an endotracheal tube or a tracheostomy tube and a suction catheter that decreases the tendency of mucus and bacteria to adhere to the inner surfaces of the thereof. The endotracheal tube and the catheter may have a hydrophobic surface exhibiting the lotus effect, which may be formed either by femtosecond laser etching or by a coating of ploy (ethylene oxide). Alternatively, the endotracheal tube and the catheter may have a lumen coated with a photocatalyst. The endotracheal tube may also have a light source and a fiberoptic bundle mounted thereon, the optical fibers extending into the lumen to illuminate the photocatalyst.