Abstract: The present invention discloses a positive and negative dual function magnetic resist lithography method. At first, a substrate coated with a positive and negative dual function magnetic resist layer is provided. The positive and negative dual function magnetic resist layer comprises a manganese(Mn)-containing precursor and at least one hydrophilic polymer. Next, at least one exposure procedure for the positive and negative dual function magnetic resist layer is performed to form either a positive resist or a negative resist. In addition, after the at least one exposure procedure, a developing procedure using water-soluble developer is performed.

Abstract: The present invention discloses a composite material with electron-donating and electron-accepting property is disclosed, wherein the composite material comprises a plurality of nanoparticles with electron-accepting property, a plurality of diblock copolymers, and a bi-continuous structure. Each diblock copolymer comprises a first polymer chain with electron-donating property and a second polymer chain connected with the mentioned nanoparticles. Additionally, the bi-continuous structure containing a first domain and a second domain, wherein the bi-continuous structure is self-assembled from the diblock copolymers, wherein the first polymer chain is in the first domain, and the second polymer chain and the plurality of nanoparticles are in the second domain. Furthermore, this invention also discloses methods for forming the composite material and their applications.

Abstract: The present invention discloses a method by utilizing chemical reaction or specific attractive forces (complexation or hydrogen bonding) for forming self-synthesizing conductive or conjugated polymer film and its application. First of all, at least one photoresist layer with a first functional group and a specific pattern is formed, so that the first functional group can bond a second functional group of a conductive or conjugated polymer unit, whereby a conductive or conjugated polymer film with specific pattern is formed. Furthermore, this invention can be applied for forming emitting films, especially for forming emitting layers of OLED/PLED elements.

Abstract: A method of restoring a tooth cavity is conducted by a direct or indirect method with a visible light curable nanocomposite of a dental restorative material with a low polymerization shrinkage, wherein the dental restorative material comprises an epoxy resin, inorganic oxide nano particles, a photoinitiator and a photosensitizer. The direct method involves the filling of the tooth cavity with the nanocomposite dental restorative material, stacking the nanocomposite dental restorative material in the tooth cavity, and curing with visible light followed by shaping and polishing. The indirect method involves making a mold of the tooth, casting the mold with the nanocomposite dental restorative material, curing with visible light followed by shaping and polishing, then removing the shaped and polished material and adhering it to the tooth cavity.

Abstract: The present invention discloses a simple, low cost method to fabricate light emitting source using luminescent colloid nanoparticles. It uses monodispersed colloid light emitting nanoparticles of oxides, semiconductors, and polymers to fabricate high quality, narrow bandwidth light emitting source. The colloid particles can be dispersed homogeneously in liquid that can be coated easily on a substrate using a simple coating method such as spray, dip coating or spin coating. There is no restriction on the size or shape of the substrate. Therefore, a low cost, large area, high efficiency and reproducible light emitting source can be made easily.

Abstract: Enclosed are high refractive index and low birefringence organic/inorganic hybrid materials useful for optical applications. They are prepared from solventless metal aliphatic acryl alkoxides. The metal acryl alkoxides are synthesized from exchanging acryl alcohol with metal alkoxides, and are hydrolyzed into metal oxide nanoparticles and are well dispersed in the acrylate matrix. Then they are polymerized into organic/inorganic hybrid materials containing metal oxide in polyacrylate.

Abstract: The present invention relates to a light curable epoxy nano composite for dental restorative material with a low polymerization shrinkage used for restorative and esthetic dentistry, comprising a mixture of light curable epoxy resin, instead of the conventional acrylic material, with inorganic oxide nano particles. The light curable epoxy resin consists of epoxy resin monomers, photoinitiator and photosensitizer. The surface of inorganic oxide nano particles can be further modified organically to improve the dispersion and stability of inorganic oxide particles in epoxy matrix or to increase the bonding force between particles and matrix. The present material uses epoxy resin as primary material and has therefore a polymerization shrinkage 50% lower than that of conventional acrylic materials. It thus represents a low shrinkage dental restorative material.

Abstract: The present invention discloses a simple, low cost method to fabricate light emitting source using luminescent colloid nanoparticles. It uses monodispersed colloid light emitting nanoparticles of oxides, semiconductors, and polymers to fabricate high quality, narrow bandwidth light emitting source. The colloid particles can be dispersed homogeneously in liquid that can be coated easily on a substrate using a simple coating method such as spray, dip coating or spin coating. There is no restriction on the size or shape of the substrate. Therefore, a low cost, large area, high efficiency and reproducible light emitting source can be made easily.

Abstract: A single electron device. Fabricated from nanoparticle derivatives, particularly from Au and fullerene nanoparticle derivatives, the device reduces thermal fluctuation in the nanoparticle array and has 15 nm of spacing between two electrodes.

Abstract: Enclosed are high refractive index and low birefringence organic/inorganic hybrid materials useful for optical applications. They are prepared from solventless metal aliphatic acryl alkoxides. The metal acryl alkoxides are synthesized from exchanging acryl alcohol with metal alkoxides, and are hydrolyzed into metal oxide nanoparticles and are well dispersed in the acrylate matrix. Then they are polymerized into organic/inorganic hybrid materials containing metal oxide in polyacrylate.

Abstract: Enclosed are high refractive index and low birefringence organic/inorganic hybrid materials useful for optical applications. They are prepared from solventless metal aliphatic acryl alkoxides. The metal acryl alkoxides are synthesized from exchanging acryl alcohol with metal alkoxides, and are hydrolyzed into metal oxide nanoparticles and are well dispersed in the acrylate matrix. Then they are polymerized into organic/inorganic hybrid materials containing metal oxide in polyacrylate.

Abstract: Liquid crystal thermoset epoxy resin is used as an electrical insulator on electrical conducting devices such as coils and transformers. The linear epoxy/mesogen/epoxy molecule of the liquid crystal thermoset epoxy resin results in a electrical insulator with a high degree of crystallinity. This results in an electrical insulator with mechanical and electrical properties suitable for use in high temperature, high stress environments.

Abstract: A method for producing ceramic tape used to fabricate electronic devices while eliminating continued shrinkage of the unfired tape. Chemical agents are added to a mixture of ceramic powder and binder to manipulate the crosslinking of the binder. A first approach involves promoting the crosslinking reaction to completion quickly. The second approach involves preventing the crosslinking reaction during the tape slurry mixing and casting processes. A solvent is used to accelerate the crosslinking of the binder in which the solvent may include one or more of acetone, acetylacetone, toluene and ethanol. Preferably, the solvent is a combination of acetone and acetylacetone. A polyhydroxy compound, such as glycerine, may be added to accelerate the crosslinking reaction of the binder. The boron in the tape may alternatively be rendered inoperative as a crossing agent for the binder by pre-reacting the boron with the Lewis base prior to contact with the binder.

Abstract: Resin compositions comprising 20 to 50% by weight, based on total composition weight, of a first resin which comprises an acrylate-epoxy oligomer having a molecular weight of from 2000 to 5000; from 2 to 10% of a second resin which comprises an acrylate-urethane oligomer; up to 50% of a third resin which comprises a second acrylate-epoxy oligomer, where from 1 to 5% of the epoxy is an epoxy novolac; from 10 to 40% of a liquid acrylate; from 2 to 20% of a liquid diacrylate having an ether linkage; from 5 to 25% of a liquid alkylene diacrylate; and from 1 to 5% of a UV photoinitiator. The compositions also preferably includes from 0.05 to 1% of a flow control agent. The compositions are applied to substrates such as printed wiring boards and cured with ultraviolet light to form a conformal coating on the substrate.

Abstract: Solventless ultraviolet (UV) radiation curable polyamideimides which are useful as coatings for substrates are disclosed. The UV curable solventless polyamideimides are prepared by grafting acrylate functionality on the polyamideimide backbone The polyamideimides of the invention may be a part of UV curable compositions.

Abstract: A two package UV curable conformal coating has been developed which possesses low moisture permeability and good electrical properties and provides a cure for shadowing of components on a printed wiring board. The conformal coating is a mixture of Component (A) which is a mixture of (1) from about 40 to 80% by weight, of a urethane having a free isocyanate group; (2) from about 20 to 60%, by weight, of reactive acrylate diluents; (3) from 0 to about 10% by weight of UV photoinitiators; and (4) from 0 to about 10% by weight of additives; and component (B) which is a mixture of (1) about 50 to 80% by weight of an acrylate-epoxy resin; (2) about 1 to 10% by weight of an acrylate-urethane oligomer; (3) about 10 to 94% by weight of reactive acrylate monomers; (4) from 0 to about 10%, by weight, of UV photoinitiators; and (5) from 0 to about 10% by weight of additives; with the proviso that the total weight percentage of said photoinitiators and additives not be less than 1 percent and not exceed about 10 percent.

Abstract: A UV curable electrically conductive adhesive has been developed with low resistivity, adequate lap shear strength, good thermal stability, and very stable conductivity at high temperatures of about 100.degree. C. and high humidity. The adhesive may be applied by silk screen printing and cured by UV in about 8 seconds. The adhesive may also be used as a replacement of solder in automated surface mount technology for electronic circuit fabrication. The adhesive is a mixture of (A) a blend of an acrylate epoxy and a urethane, a copolymer of an acrylate epoxy and a urethane, or mixtures thereof; (B) a polyfunctional acrylate monomer; (C) a photoinitiator, and (D) a conductive filler. Optionally, adhesion promoters and flow control agents may be used.

Abstract: A system which utilizes a source of ultraviolet radiation to mark a surface or to cure selectively a photosensitive paint applied to a surface. The source of UV light is either a laser or a broadband source and the light is controlled by an aperture and/or a stencil apparatus. The photosensitive paint is applied by a controlled technique as a protective or a decorative coating.

Abstract: A void-free prepreg is made by contacting a porous sheet material with a resin so that resin enters the sheet, providing a subatmospheric pressure on one side of the resin-containing sheet to draw resin through the sheet, and then B-staging the resin-containing sheet.

Abstract: Disclosed is a resin composition which comprises a mixture of a polyester, an acrylate urethane, in about stoichiometric proportion with the polyester up to about 10% excess polyester over stoichiometric, and a liquid acrylate reactive diluent sufficient to give the resin composition the viscosity of less than 5,000 centipoise. The polyester resin is the reaction product of a polyhydroxy compound having at least three hydroxyl groups, and an aromatic compound that is at least difunctional in acid, anhydride, or ester groups, where the proportion of the polyhydroxy compound to the aromatic compound is such that the polyester has about 150 to about 250 mole % excess hydroxyl groups. The acrylate urethane compound is the reaction product of a hydroxy acrylate and an isocyanate having at least two isocyanate groups, where the hydroxy acrylate and a hydroxy acrylate having a single hydroxyl group are equimolar (when a diisocyanate is used) with the isocyanate .+-.10 mole %.