Abstract: Disclosed herein is the preparation of thin films of tungsten, molybdenum, rhenium or osmium on a high-temperature resistant substrate by thermal evaporation in a high vacuum, wherein the oxides of these high-temperature-resistant metals are evaporated simultaneously with a reduction metal in a manner such that the oxide molecules and the metal atoms or molecules impinge together on the surface of the substrate heated to a predetermined temperature and react with each other there chemically, so that the high-temperature-resistant metal oxides are reduced and the reduction metals are oxidized. In this process, the high-temperature-resistant metal is deposited on the surface of the substrate, and the oxides of the reduction metals evaporate, either completely or partially, and are pumped off.

Abstract: There are disclosed surface lubricants or processing aids for synthetic fibers particularly polyester, polyacrylic, and polyamide (nylon) fibers or mixtures thereof comprising an ethylene oxide capped heteric polymer of tetrahydrofuran (tetramethylene oxide) and ethylene oxide designated as a heteric/block copolymer having the formula:Y--(A).sub.n --(C.sub.2 H.sub.4 0).sub.m --H].sub.

Abstract: Filament-reinforced A-type PMR polyimide composites are prepared by mixing known monomers, applying the mixture as a matrix material to a plurality of the filaments, imidizing to obtain a prepolymer having a defined melt temperature range, heating the prepolymer to an addition polymerization temperature to effect cure, applying a pressure of 50-300 psi before reaching cure temperature and while in the melt temperature range, and maintaining said pressure while curing.

Abstract: A method of indirectly connecting two parts, such as an acousto-optical building component composed of lead glass and a piezo electric transducer composed of lead-zirconium titanate, whereby at least one mono-molecular layer (having a maximum thickness of 100 nm) composed of a lead-free glass is directly applied under vacuum onto the surfaces of the parts to be joined and metal layers are then applied under vacuuum onto such glass layer and/or the surfaces to be joined so that when the free surfaces of such free metal layers are brought into contact with one another under vacuum, a bond forms therebetween and such bonds indirectly connect the parts with one another. The glass layer prevents diffusion of atoms or ions from the materials (such as lead) on either side of such layer so that the parts so-joined and/or the bonds so-formed are not impaired in any way.

Abstract: This invention relates to improvements in the art of aluminizing the phosphor screens of image display devices such as television cathode ray picture tubes. A solution for rewetting a phosphor-bearing image display faceplate prior to aluminizing comprises a highly alkaline aqueous dispersion of a siliceous coating agent and a surfactant. The solution according to the invention includes an acidic pH-lowering substance in an amount sufficient to adjust pH to a neutral range.

Abstract: Finely divided carbon in emulsion in an organic silicate is silk screened onto a substrate to form conductive elements for a fluorescent display device which, when baked, provides a willing host surface upon which a phosphor coating is applied. In one embodiment of the invention, a metallic oxide is mixed with the finely divided carbon.

Abstract: Process for depositing a thin conducting metal layer on an insulating support comprising the steps of applying on said support a layer of nonconducting ink loaded with a powder of metal, alloy or metallic derivative, heating said support and said layer to harden said ink layer, treating the surface of said layer so as to lay the particles forming said powder bare and immersing said thus coated support into a bath containing, in the form of particles, the conducting metal to be deposited, under conditions which are known per se and such that said conducting metal particles are deposited on the powder particles laid bare, wherein is used as insulating support a support made of an inorganic material provided with an enamel coating and the ink used being a compound formed of an enamel and a carrier, the melting point of said enamel being substantially equal to, and preferably slightly lower than, the softening point of the outer layer of said coating.

Abstract: A process for manufacturing a ferroelectric device includes the steps of chemically cleaning a substrate, followed by radio frequency etching of the substrate. The substrate is then pre-heated. A first electrical contact is then formed on the substrate, and over a portion of the first electrical contact there is vapor deposited a stable thin film of potassium nitrate. Then a second electrical contact is formed over at least a part of the thin film of potassium nitrate. A covering of silicon monoxide is then vacuum deposited over the assemblage of the first and second electrical contacts and the potassium nitrate. The assemblage is then annealed for approximately twenty-four hours at a temperature of approximately 160.degree. C.

Abstract: There is provided a method for depositing asphalt from an asphalt emulsion onto an aggregate, as in road construction. Prior to applying the asphalt emulsion, the aggregate is wetted down with water containing a minor amount of an anionic or a cationic coupling agent selected to have a charge opposite to that of the asphalt emulsion.

Abstract: A method for making an optically clear, colorless, transparent, electrically conductive coating by vacuum deposition is disclosed. The method involves depositing a first layer of titanium suboxide, a second layer of silver or gold, and a third layer of titanium suboxide, and treating the coating with an oil, wax, or other organic material before exposure to an ordinary atmosphere of air in order to control the rate of subsequent oxidation of the titanium suboxide. The coating deposited on a rigid transparent substrate such as glass or plastic, or on a flexible transparent plastic substrate subsequently laminated to a rigid transparent substrate, is useful for electrically heating windows.

Abstract: Disclosed is a method of fabricating bi-level circuits which include metallization of via holes (14 and 15) in insulating subustrates (10). A thick film metal paste (13) is prepared which according to one embodiment comprises copper, glass frit and an organic vehicle including a low molecular weight ethyl cellulose binder and solvents of butyl carbitol acetate and alpha terpineol. The paste is deposited onto the substrate and through the holes. The structure is baked with the printed surface (12) down in order to establish a solvent concentration gradient in the paste which results in solid material accumulating away from the printed surface to form the contact pad (16). The material is then fired to establish the desired conductivity.

Abstract: A process for impregnating capacitors with a gas absorbing impregnant is disclosed including the steps of purefying a phthalate ester by adsorptive filtration and adding 5 to 30% by volume of an alkene having from 10 to less than 20 carbon atoms and 0.1 to 10% by volume of an epoxy stabilizer to the phthalate ester prior to impregnating the capacitor.

Abstract: An improved electrical resistor device is made by molding a body of ceramic material of positive temperature coefficient of resistivity so that a plurality of passages extend in a pattern in spaced side-by-side relation to each other between opposite ends of the body. In molding the body, lands or abutments of resistor material are formed around the ends of alternate body passages at one end of the body and similar lands or abutments are formed around the ends of the other passages at the opposite end of the body. A band of masking material is applied to the sides of the body extending around the body leaving the ends of the body, and bands of the body side surface adjacent each end of the body, free of masking material. The masked body is then immersed in a coating bath for simultaneously coating the inner walls of the body passages, the ends of the body, and the unmasked bands of the body side surface with an electrically conductive ohmic contact material.

Abstract: This invention is for providing a bearing lining on a backing, for example of aluminum, and uses polyphenylene sulphide which has good bearing properties, in combination with a base comprising a component of a metal from Group I or Group II of the Periodic Table, to effect a good bond between the lining and the backing.

Abstract: A solid-state diffusion method for providing ohmic contacts to n-type Group II-V semiconductor materials, such as gallium arsenide (GaAs). The material is successively cleaned, etched, rinsed, re-etched, rinsed and placed in an oil-free vacuum. The substrate is then heated to desorb surface oxides and an epitaxial layer of germanium and a layer of nickel, or other refractory, are deposited on the substrate at specific temperatures. Next, the structure is annealed in the vacuum at temperatures sufficient to diffuse the germanium into the GaAs material and to establish an ohmic contact.

Abstract: The surfaces of organic and inorganic substrates, such as polyethylene film and metals, respectively, can be modified by cold plasma deposition of difluorocarbene or trifluoromethyl radical specie generated by subjecting precursor vapor, for example, perfluorocyclobutane or hexafluoroethane, to a radio frequency electrical glow discharge.

Abstract: This disclosure describes transparent glass window structures of the type bearing a first coating of infra-red reflective material which is advantageously less than about 0.85 microns in thickness and wherein the observance of iridescence resulting from such a first coating is markedly reduced by provision of a second coating arranged in register with said first coating, the second coating providing at least two interfaces which, with the mass of the second coating, form means to reflect and refract light therefrom to interfere with the observation of iridescence. The invention also encompasses processes for providing such windows. A particular advantage of the invention is its efficacy with clear and lightly tinted glasses wherein the problem of iridescent color has had its greatest commercial impact.

Abstract: Wetting by toners of the surface of reusable photoconductors in electrophotographic processes results on image cycling in adhesion of the toner to the photoconductor surface to form a film. Such filming is reduced or eliminated by including in the developer a small amount of certain unpigmented organic polymeric materials having smaller particle size than the pigmented toner particles. Suitable organic polymers are fluorinated hydrocarbon polymers and copolymers, and polyethylene.

Abstract: A glass-free thick film varistor operable at operating voltages ranging from about 30 to 200 volts per mm of active varistor material is produced by providing a screen-printable paste comprised of a non-glass containing substantially homogeneous mixture of granular varistor materials which have ZnO as the main component thereof and an organic binder, applying such paste in a desired pattern onto an insulating substrate and sintering such applied paste at relatively high temperatures so as to convert the paste into thick film varistors.

Abstract: Fuel cell electrodes of uniform quality are made on a continuous basis using screen printing. A wet floc is first made by floccing a co-suspension of carbon and hydrophobic polymer. The floc is dried, reduced to a fine powder, and re-suspended in an inking vehicle. The ink is then screen printed onto a porous substrate and the inking vehicle is removed such as by heating. The layer is compacted, sintered, and then catalyzed such as with platinum.