Abstract:
The invention relates to a method for producing an oriented-porosity dielectric material on a substrate comprising:a) vapour phase deposition on a substrate of a composite layer, comprising a material forming a matrix and a compound comprising chemical groups capable of being oriented under the effect of an electromagnetic field and/or photonic radiation;b) the treatment of the composite layer to obtain the cross-linking of the material forming a matrix;said method also comprising a step c) consisting of subjecting said substrate coated with said composite layer to an electromagnetic field and/or a photonic radiation, said step c) being carried out simultaneously with step a), when said layer is subjected to a photonic radiation or carried out before and/or simultaneously with step b), when said layer is subjected to an electromagnetic field, given that the electromagnetic field is applied in contact with the substrate, said step c) being carried out so as to align the chemical groups mentioned in step a) in a predetermined direction.Application to the field of microelectronics, separating membranes, diffusion membranes, molecular detectors, optical materials, polymer masks.
Abstract:
Methods and devices for coating a medical device, such as a stent, including the steps of coating the medical device with a photoresist polymeric coating, irradiating a portion of the medical device, optionally applying a post-exposure bake step, and removing all or a portion of the coating from the irradiated portion of the medical device, if a positive photoresist coating material is used, or from a portion of the medical device not exposed to the radiation, if a negative photoresist coating material is used. The photoresist polymeric coating may optionally include a drug.
Abstract:
A system for depositing a composite polymer dielectric film on a substrate is disclosed, wherein the composite polymer dielectric film includes a low dielectric constant polymer layer disposed between a first silane-containing layer and a second silane-containing layer. The system includes a process module having a processing chamber and a monomer delivery system configured to admit a gas-phase monomer into the processing chamber for deposition of the low dielectric constant polymer layer, a post-treatment module for annealing the composite polymer dielectric film, and a silane delivery system configured to admit a vapor flow containing a silane precursor into at least one of the process module and the post-treatment module for the formation of the first silane-containing layer and the silane-containing layer.
Abstract:
The present invention relates to coating systems and coating systems on substrates. In an embodiment, the invention includes an article including a substrate, a base layer disposed on the substrate, the base layer comprising a silane compound with a photoreactive group, or the reaction product of a silane compound with a photoreactive group, and a polymer layer disposed on the base layer, the polymer layer comprising a polymer terminally anchored to the base layer. In an embodiment, the invention includes a coating for an article. In an embodiment, the invention includes a method of depositing a coating onto a substrate.
Abstract:
A process for lacquer coating substrates with a colored and/or effect base lacquer and a clear lacquer topcoat, in which a colored and/or effect base lacquer layer of a base lacquer coating composition is applied onto a substrate and is provided in a wet-on-wet process with a clear lacquer coating. Before being jointly stoved or jointly cured with the base lacquer layer, the uncured clear lacquer layer is exposed to high-energy radiation. In the clear lacquer coating composition, the resin solids content contains 50 to 98 wt. % of a system A) thermally curable by addition and/or condensation reactions, which system contains substantially no free-radically polymerisable double bonds and substantially no groups capable of reacting in another way with free-radically polymerisable double bonds of a system B). The resin solids content further contains 2 to 50 wt. % of a system B) which is curable under the action of high-energy radiation by free-radical polymerisation of olefinic double bonds, wherein the weight percentages adds up to 100 wt. % and the C═C equivalent weight of the total resin solids content of A) and B) is between 300 and 10000. Clear lacquer coating compositions made by the process are also described.
Abstract:
Production of a dielectric coating on a substrate whereby a poly(arylene ethers) or fluorinated poly(arylene ethers) layer is cured by exposure to electron beam radiation. A wide area electron beam is used which causes chemical reactions to occur in the polymer structure which are thought to cause crosslinks between polymer chains. The crosslinks lead to higher mechanical strength and higher glass transition temperature, lower thermal expansion coefficient, greater thermal-chemical stability and greater resistance to aggressive organic solvents. The polymer layer may also be optionally heated, thermally annealed, and/or exposed to UV actinic light.
Abstract:
An improved process which comprises applying a layer of a color coating composition to a substrate used for the exterior of a motor vehicle and then applying a layer of a clear coating composition to the color coating and curing the resulting clear coat/color coat layer; the improvement is the use of a clear coating composition containing a film forming binder of an acrylosilane polymer and exposing the clear coat layer after curing to an artificial source of UV light under ambient temperatures and atmospheric conditions in an amount sufficient to improve the resistance of the clear coat to water spotting and acid etching when exposed to natural weathering conditions.
Abstract:
Apparatus for radiation curing of decorative and protective coatings on the exterior of a can or other tubular article is constructed with a plurality of ultraviolet lamps, each of which is disposed between two runs or flights of a conveyor chain having pins that carry the articles so that each article makes two passes at each lamp to receive radiation therefrom on opposite sides of each article. Two runs of the chain are at right angles to another two runs thereof so that curing radiation impinges on the entire outer surface of the tubular article. Each lamp is disposed within an individual baffle unit including a stationary shield that surrounds a cylindrical shutter that is pivotable about its cylindrical axis between normal and standby positions. In the normal position, diametrically opposed windows of the shutter are aligned with diametrically opposed windows of the shield so that radiation from a single lamp is directed toward two flights of the conveyor chain. In the standby position, radiation opaque portions of the shutter are aligned with the windows of the shield to block radiation from reaching outside the baffle unit.
Abstract:
An ultraviolet treatment of organic titanates on metal surfaces to increase adhesion of inks and coatings is disclosed wherein the adhesion of subsequently applied inks and coatings is improved. The method includes an initial treatment of the lubricated metal substrate with an organic titanate such as tetrakis (2-ethyl hexyl) titanate and then exposing same to ultraviolet light to accelerate the reaction of the titanate with the metal surface.
Abstract:
The invention relates to a method of patterning a substrate with graphene-based or other electroactive-material-based solution that includes solid-phase particles as hard templates, reducing the solution, and processing the reduced solution to expose the particles. The exposed hard template particles are removed to leave a three-dimensional (3D) porous architecture that can be beneficially used for a variety of applications, including but not limited to bio sensors and supercapacitors. In one example, the exposure is by etching with a CO2 laser. The method can be practiced with scalable MEMS fabrication technologies.