Abstract: Conductive paste for via connection of a multilayer ceramic substrate, comprising: an inorganic component which consists of 30.0 to 70.0% by weight of powder of conductive material and the remainder being one of glass powder having a softening point higher than a starting point of sintering of insulating material and crystalline glass ceramic powder having a glass transition point higher than the starting point of sintering of the insulating material; and an organics vehicle component which consists of at least organic binder and solvent.

Abstract: Accumulated dimensional variations in fuel cells and electrolysis cell assemblies can reduce the efficiency of the assembly and provide leakage paths for fuel and oxidant. A metal compression pad comprised of a metal having an elastic strain of about 3% to about 40% at about 2,500 psig can compensate for component dimensional variations and improve inter-cell conductivity at pressures up to and exceeding about 10,000 psig.

Abstract: A reaction mixture for preparation of a fire resistant composition comprising an epoxy resin, a curing agent for said resin and a boron compound which is not a curing agent for the epoxy resin, the reaction mixture being translucent such that the reaction mixture cures to a translucent reaction product. The invention further provides a method of producing a fire resistant laminate in which the cured reaction product of a boron compound containing epoxy resin is used as an interlayer between two translucent panes and to a translucent fire resistant laminate.

Abstract: This invention offers a unique method to fabricate unique, straight, curved, or coiled tubes as small as 1 micron (0.000004 inches) in diameter with wall thicknesses starting at less than 0.01 microns. These tubes can be made from many of the materials that can be applied to a surface of carbon, glass, or other tube forming fibers and then made to withstand the environment used to remove the fiber. A monolithic piece can be formed where the tubes are channels or holes.

Abstract: Provided is a method for laminating PBZT/fusible sol-gel glass microcomposite film layers by applying an adhesive of fusible sol-gel glass to the bonding surfaces of such films and compressing the film layers and the so-formed adhesive layer therebetween, at sufficient temperature and pressure to laminate the film and adhesive layers together. The sol-gel glass infiltrant and adhesive may be of the same or different materials. Desirably, the bonding surfaces of such films are roughened before application of the adhesive layer therebetween. The invention also includes the laminates prepared by the above method which laminates exhibit good coherent bonding between layers, high tensile strength and good interlaminar strength between layers for fabrication into durable high-strength space-age structures.

Abstract: In a borosilicate glass plate containing Li.sub.2 O, Na.sub.2 O and K.sub.2 O and for use as a window plate in an alumina package for containing a semiconductor device, Li.sup.+ and Na.sup.+ ions are partially ion-exchanged by K.sup.+ ions in a surface of the glass plate to form a surface layer having a compressive stress of 200 Kg.f/cm.sup.2 or more, in order to make a thin window glass plate for the package having a thickness of 0.7 mm or less and a sufficient mechanical strength. The glass also has a thermal expansion coefficient of 50-75.times.10.sup.-7 /.degree. C. over a temperature range of 30.degree.-380.degree. C. so as to be thermally compatible with the alumina package. The glass consists essentially of SiO.sub.2 55-64%, Al.sub.2 O.sub.3 7-20%, B.sub.2 O.sub.3 11-19%, Li.sub.2 O 0-8%, Na.sub.2 O 7-20%, K.sub.2 O 0-4%, and RO 0.5-7% on the base of weight percent, where R is at least one of Mg, Ca, Sr, and Ba. In order to insure the ion exchange, amounts of Li.sub.2 O, Na.sub.2 O and K.sub.

Abstract: A ceramic composition for forming a ceramic dielectric body having a dielectric constant of less than about 5.5 and a TCE of less than about 3.5 ppm/.degree.C. The composition comprises a mixture of finely divided particles of 20-80 vol. % borosilicate glass and 20-80 vol. % of Al.sub.x B.sub.y O.sub.z wherein x is in the range of 4 to 22, y is in the range of 2 to 5, and z is in the range of 9 to 36. The Al.sub.x B.sub.y O.sub.z inhibits the formation of crystalline forms of silica. The composition can be used with a polymeric binder to produce an unfired green tape which is co-fireable with high conductivity metallurgies such as gold, silver and silver/palladium.

Abstract: A surface of one substrate is bonded to a surface of another substrate employing a low temperature vulcanizing carborane siloxane adhesive composition. The bonding method comprises: (a) forming a solution comprising (1) a polycarborane siloxane polymer having vinyl groups attached to the backbone thereof, the concentration of vinyl groups per carborane group ranging from about 3 to 30%, (2) a difunctional silane curing agent, (3) a catalyst comprising a transition metal complex, and (4) a chosen solvent; (b) applying the solution to at least one of the surfaces; (c) allowing the solvent to evaporate, forming a thin film of the adhesive on the surface; (d) bringing the surfaces of the substrates into contact; and (e) bonding the surfaces of the substrates together by application of heat and, optionally, pressure. Optionally, the coated part(s) may be stored at a low temperature for a long period of time prior to the bonding process.

Abstract: An electrically resistive film of the type used for forming thick film resistors is formed predominantly of palladium and includes an addition of boron nitride to increase resistance, preferably in combination with tantalum oxide. A paste of palladium powder and boron nitride powder dispersed in a vaporizable vehicle is applied to a substrate and sintered to form the film. In a preferred embodiment, the substrate is a ceramic powder compact that is concurrently sintered in a co-firing process.

Abstract: Insectproofing fibers are disclosed in which the surface of the fibers is coated with a mixture of an organic insectproofing agent, an organic insectproofing agent included in a monomer-trimer type cyclodextrin having an average molecular weight of 3000 or less and an organopolysiloxane, and the interior of the fibers is also impregnated with the mixture. The insectproofing fibers have an insectproofing effect against bugs for a long period of time and the effect is durable.

Abstract: For protection against oxidation or other adverse chemical deterioration, substrates such as carbon, intermetallic aluminides, and refractory metal alloys are provided with barrier coatings of an aluminoborate glass-ceramic coating having a composition, in weight percent, of about 10-55% Al.sub.2 O.sub.3, 4-40% B.sub.2 O.sub.3, up to 70% total of RO, wherein RO consists of one or more alkaline earth metal oxides selected in amounts not exceeding the indicated proportions from the group consisting of up to 70% BaO, up to 60% SrO, up to 40% CaO, and up to 25% MgO, up to 35% total of R.sub.2 O, wherein R.sub.2 O consists of one or more alkali metal oxides selected in amounts not exceeding the indicated proportion from the group consisting of up to 35% Na.sub.2 O, up to 30% K.sub.2 O, and up to 15% Li.sub.2 O, up to 25% total of metal oxides selected from the group consisting of ZnO and MnO, up to 30% of SiO.sub.2, and up to 10% F.

Abstract: Ceramic matrix composite articles comprising a matrix phase composed of a silicate glass or glass-ceramic and a matrix reinforcement material disposed within the matrix comprising carbon (e.g., graphite) fibers are described, wherein the fibers are provided with a protective boron nitride surface coating. The mechanical properties of the composites at high temperatures are substantially improved.

Abstract: A window glass has a heat ray reflective layer including metal nitrides as a component thereof and an antenna conductor for an automobile wherein the heat ray reflective layer has a surface resistance of at least 20 k.OMEGA./sq. for preventing interference with the antenna operation.

Abstract: A discontinuous carbon fiber reinforced glass matrix composite includes a glass matrix, a plurality of carbon reinforcing fibers dispersed in the matrix, and a plurality of boron nitride reinforcing particles dispersed in the matrix. The composite may be fabricated by mixing glass powder and boron nitride reinforcing particles in a carrier liquid to create a slurry and adding a binder to the slurry. A continuous multifilament carbon fiber yarn is impregnated with the slurry and dried to remove the carrier liquid. The impregnated carbon fiber yarn is cut to a suitable length and is molded in a suitable molding means to form a carbon fiber reinforced glass matrix composite article.

Abstract: A mask structure for lithography including an annular base plate supporting a peripheral portion of a masking-material-holding film provided on a surface thereof with a desired pattern of the making material is provided which is characterized in that the masking-material-holding film and the base plate are bonded together at an outer peripheral surface, which is connected smoothly or with an appropriate angle to the topmost flat end surface of the base plate and is at a lower level than the topmost flat end surface of the base plate, or at a surface contiguous to the outer peripheral surface.

Abstract: An amorphous oxide film composed essentially of an oxide containing at least one member selected from the group consisting of Zr, Ti, Hf, Sn, Ta and In and at least one member selected from the group consisting of B and Si.

Abstract: Fibres, particularly glass or rock wool fibres coated with a modified polyvinyl alcohol-based polymer and suitable for use as a base material to produce a surface coating on a backing by a simultaneous spraying of the coated fibres mixed with water and a cross-linking agent. A method of producing the fibres to make them suitable to be sprayed in the manner described is also provided.

Abstract: An element comprising a support having an antistatic layer applied to one side thereof and wherein said antistatic layer also contains antihalation dyes absorbing light at 440 nm and below and with matte particles therein, is described. A photosensitive layer, e.g., photographic silver halide layer can be coated on the opposite side of the support. The element exhibits excellent antistatic and antihalation properties as well as low dye stain and improved dimensional stability, compared to elements wherein the antihalation dyes are coated in a separate layer. These products are especially useful as so-called "bright-light films" that are designed for contact printing and the like.

Abstract: An electronic package comprising dielectric layers including a densified aluminum nitride (AlN) base layer and at least one densified AlN-borosilicate glass composite layer bonded thereto is described. Any of the dielectric layers may be metallized with conductive circuit patterns and can contain conductive vias. Production of this package is accomplished by hot pressing a greenware laminate comprising a densified base (e.g., AlN); at least one green sinterable sheet (e.g., AlN-borosilicate glass composite); and a green sheet of non-sinterable material (e.g., boron nitride [BN]). The respective green sheets comprise homogeneous mixtures of the ceramic powders and a binder, e.g., polyethylene. The polyethylene is burnt off during the hot press operation. Residual BN is removed by brushing and/or grit blasting, leaving the finished electronic package, all ceramic elements of which are densified. The package provides superior thermal conductivity, strength, dielectric properties, and silicon-compatibility.

Abstract: A laminated glazing includes a support (1) of glass and/or plastic and a plastic sheet (5) having at least one layer of thermoplastic material, particularly a polyurethane layer. The glazing further includes a colored enamel border (2), an electroconductive coating (3) and electric power lead-in strips (4). Application is to the so-called heated laminated safety glazings.

Abstract: The present invention relates to a glass for making glass to metal seals. The coefficient of thermal expansion of the glass is in excess of 160.times.10.sup.-7 in/in/.degree.C. making the glass particularly useful for sealing copper and copper based alloys. The glass has particular utility in the manufacture of electronic packages and multi-layer circuitry.

Abstract: The present invention is directed to a ceramic coated metal substrate having improved processibility characteristics in the manufacture of electronic devices, as for example electronic circuits, and to processes for manufacture of such devices.

Abstract: The invention is directed to a thick film thermistor composition consisting of finely divided particles of (a) a ruthenium-based pyrochlore, and (b) a short borosilicate glass or glass mixture, both dispersed in (c) an organic medium.

Abstract: A mask structure for lithography comprising an annular base plate supporting a peripheral portion of a masking-material-holding film provided on a surface thereof with a desired pattern of the masking material is provided which is characterized in that the masking-material-holding film and the base plate are bonded together at an outer peripheral surface, which is connected smoothly or with an appropriate angle to the topmost flat end surface of the base plate and is at a lower level than the topmost flat end surface of the base plate, or at a surface contiguous to the outer peripheral surface.

Abstract: An element, e.g., photographic element, comprising a polymeric shaped article having available carboxyl groups on the surface thereof and which is coated with at least one permanent antistatic layer consisting essentially of the reaction produce of(1) water-soluble, electrically conductive polymer having functionally attached carboxyl groups integral to the polymer, and(2) polyfunctional substituted aziridine, e.g., with alkyl of 1 to 6 carbon atoms, the coating weight of the antistatic layer, based on weight of (1), being less than 4.5 mg/dm.sup.2, preferably less than 3.8 mg/dm.Elements using such layers are free of haze and show reduced propensity to produce static. The layers are useful in silver halide, photopolymer, diazo, and vesicular image-forming elements, etc.

Abstract: A process for making a fire-retardant composition in which monoaluminumphosphate is reacted with boric acid in a weight ratio 10:1 to 25:1, and to which preferably aluminum oxide in the form of aluminumhydroxide gel is added. The composition is applied between glass panes to form a fire-retardant barrier.

Abstract: An improved dielectric ink for the fabrication of multilayer integrated circuits is disclosed. The subject inks comprise a devitrifying magnesium-barium-aluminum-zirconium-borophosphosilicate glass frit, an organic vehicle and, optionally, a suitable ceramic filler material. Dielectric layers and stand-alone substrates formed from the subject inks are characterized by good mechanical strength, heat resistance and exceptional density. The subject inks are particularly useful in the fabrication of multilayer circuit structures based on copper since their exceptional density renders them resistant to penetration by flux materials from the copper conductor layers.

Abstract: A composite capillary tube structure made of a plurality of glass layers and methods for making same. This composite includes inner and outer layers of fused silica glass separated by an intermediate layer of a glass material having a higher coefficient of thermal expansion than the fused silica glass. The glass material of the intermediate layer also has a glass transition temperature on the same order as that of fused silica, so that the fused silica layers are maintained under compressive forces over a temperature range of up to about 400.degree. C. Preferably, the intermediate layer is a borosilicate or aluminosilicate glass.

Abstract: Hydrogenated boron-silicon alloy films having unexpected properties permitting in one embodiment the bonding together of metal and ceramic substrates by coating the surfaces to be bonded with the film mating the surfaces and heat treating the mated surfaces to expell hydrogen therefrom and to react to resulting boron-silicon alloy film with the substrates to form a liquid reaction product which forms a surface bond with the substrates or is at least partially absorbed in the substrates. In another embodiment, at least one surface of an intermetallic compound formed from elements selected from groups III and V of the periodic table is sealed against structural degradation by forming on the surface a solid boron-silicon-hydrogen alloy film. In still another embodiment, metal and organic resin substrates are protected against attack by water vapor, dissociated oxygen and molecular oxygen by forming a solid boron-silicon-hydrogen alloy film on the substrates.

Abstract: Hydrogenated boron-silicon alloy films having unexpected properties permitting in one embodiment the bonding together of metal and ceramic substrates by coating the surfaces to be bonded with the film mating the surfaces and heat treating the mated surfaces to expell hydrogen therefrom and to react to resulting boron-silicon alloy film with the substrates to form a liquid reaction product which forms a surface bond with the substrates or is at least partially absorbed in the substrates. In another embodiment, at least one surface of an intermetallic compound formed from elements selected from groups III and V of the periodic table is sealed against structural degradation by forming on the surface a solid boron-silicon-hydrogen alloy film. In still another embodimemt, metal amd organic resin substrates are protected against attack by water vapor, dissociated oxygen and molecular oxygen by forming a solid boron-silicon-hydrogen alloy film on the substrates.

Abstract: Luminescent aluminoborate and/or aluminosilicate glass which is activated by one or more rare earth metals. The glass has a matrix comprising from 5 to 65 mol. % of one or more of the alkaline earth metal oxides BaO, SrO, CaO, ZnO and MgO, from 20 to 85 mol. % of B.sub.2 O.sub.3 and/or SiO.sub.2 and from 1 to 35 mol. % of Al.sub.2 O.sub.3. The glass contains as activator Tb.sup.3+ and/or Ce.sup.3+ in a quantity, calculated as Tb.sub.2 O.sub.3 and/or Ce.sub.2 O.sub.3, of 0.1 to 10 mol. % with respect to the matrix. The luminescent glasses have high conversion efficiencies, especially high quantum efficiencies upon UV excitation, and are preferably used in luminescent screens of, for example, discharge lamps or cathode-ray tubes.

Abstract: This invention is directed to the production of unitary, transparent glass articles demonstrating exceptionally high flexural and impact strengths composed of an interior portion and an integral surface compression layer. The articles are prepared by contacting glass bodies consisting essentially, in mole percent, of 14-24% R.sub.2 O, wherein R.sub.2 O consists of 0-5% Li.sub.2 O, 0-5% K.sub.2 O, and the remainder Na.sub.2 O, 17-21% Al.sub.2 o.sub.3, 45-60% SiO.sub.2, 3-6% TiO.sub.2 and/or ZrO.sub.2, and 0-2% P.sub.2 O.sub.5, the sum of those components constituting at least 85% of the total composition, at a temperature above the annealing point of the glass with a source of Li.sup.+ ions to replace at least part of the Na.sup.+ ions and, if present, K.sup.+ ions in a surface layer with a corresponding amount of Li.sup.+ ions and to react the Li.sup.+ ions with Al.sub.2 O.sub.3 and SiO.sub.2 in the surface layer to form crystallites of beta-quartz solid solution nucleated by the TiO.sub.2 and/or ZrO.sub.2.

Abstract: A photomask blank comprising a transparent substrate and at least two layers including a masking layer and an antireflection layer, formed thereon, wherein said masking layer is a chromium masking layer containing more than 25% by atomic ratio of nitrogen, and said antireflection layer is a chromium oxide antireflection layer containing more than 25% by atomic ratio of nitrogen.

Abstract: There is disclosed a laminated ceramic structure including a facing member and a backing member, the two members being bonded together either directly or through an intermediate layer, the facing member being formed from a very hard ceramic such as a carbide having a KHN.sub.100 value in excess of 1000 kg/mm.sup.2, the backing member being a glass or glass-ceramic matrix having an enhanced capability or absorbing impact energy, preferably being fiber reinforced and having an energy absorbing capacity in excess of 10 KJ/m.sup.2.

Abstract: A method is disclosed for coating a substrate with a uniformly smooth layer of a boron hydride polymer. The method comprises providing a reaction chamber which contains the substrate and the boron hydride plasma. A boron hydride feed stock is introduced into the chamber simultaneously with the generation of a plasma discharge within the chamber. A boron hydride plasma of ions, electrons and free radicals which is generated by the plasma discharge interacts to form a uniformly smooth boron hydride polymer which is deposited on the substrate.

Abstract: Base metal resistive paints, resistors made therefrom and method for making the resistive paint are disclosed. The base metal resistive paints comprise 20 to 25% tantala glass frit and 75 to 80% tin oxide, ground to a particle size of ten microns or less; and well mixed with 25 to 35% screening agent for subsequent screening upon a suitable substrate, and firing in an inert atmosphere at a peak temperature of about 900.degree. C. The tantala glass frit preferably comprises 5 to 25% tantatum oxide. The tin oxide is preferably preheated at 450.degree. to 600.degree. C. in the presence of a reducing gas, prior to mixing with the tantala glass frit. The screening agent preferably forms no carbon residue when pyrolytically decomposed in an inert atmosphere during firing.

Abstract: A vitreous semiconductor supporting structure obtained by connecting semiconductor layers to a vitreous support constituted by at least two glasses. The semiconductor layers are constituted by an electrically and optically active n-ary III-V compound layer (3) and optional complementary layers for passivation (4), index adaptation (6), and protection (7). To keep the active layer in a compression state and optimize its electrical properties, the structure includes at least two glasses, an intermediate glass (15) providing thermoelastic properties and a supporting glass (16) providing a high softening temperature.

Abstract: Base metal resistive paints, resistors made therefrom and method for making the resistive paint are disclosed. The base metal resistive paints comprise 20 to 25% tantala glass frit and 75 to 80% tin oxide, ground to a particle size of ten microns or less; and well mixed with 25 to 35% screening agent for subsequent screening upon a suitable substrate, and firing in an inert atmosphere at a peak temperature of about 900.degree. C. The tantala glass frit preferably comprises 5 to 25% tantatum oxide. The tin oxide is preferably preheated at 450.degree. to 600.degree. C. in the presence of a reducing gas, prior to mixing with the tantala glass frit. The screening agent preferably forms no carbon residue when pyrolytically decomposed in an inert atmosphere during firing.

Abstract: Freestanding glass reinforced ceramic protective coatings are made with a shrinkable silica preform technique. The coatings may be bonded to heat sensitive organic (plastic) or inorganic (ceramic or metal) substrates to provide thermal and impact protection.

Abstract: There is provided a method for making curable compositions containing silicon-bonded hydrogen atoms and silicon-bonded olefinic radicals, the improvement comprising adding at least one free radical type photoinitiator and at least one precious metal or precious metal-containing hydrosilation catalyst so that crosslinking is effected by two separate mechanisms. The curable compositions and articles made therefrom are also provided.

Abstract: Multilevel metallization structures in semiconductor devices are improved by utilizing a two- or three-layer dielectric system wherein the dielectric layers differ in flow temperature by at least 50.degree. and preferably 100.degree. C., so that one layer may be flowed without reflow or mutual dissolution with an underlying contacting dielectric layer. The first dielectric layer is phosphosilicate glass and the second is borophosphosilicate glass. A third layer is also borophosphosilicate glass differing in composition from the second so as to provide the required flow temperature differential.

Abstract: Polymeric microparticles and dispersions of polymeric microparticles in a liquid hydrocarbon are disclosed. The dispersions are prepared by reacting in dispersed form a preformed NCO-prepolymer containing a segment solvated by the liquid hydrocarbon and a segment insoluble in the liquid hydrocarbon with an active hydrogen-containing compound. Reaction proceeds to form polymeric microparticles which are dispersed in the liquid hydrocarbon. Also disclosed are the use of the polymeric microparticles in coating compositions and articles coated with the coating compositions.

Abstract: A boron nitride (BN) film is disclosed having excellent electrical insulating and heat conduction characteristics and capable of acting as seeds for epitaxially growing a semiconductor film thereon which has a crystallizability sufficient to incorporate a semiconductor element therein. The BN film is formed by the growth on a substrate in a manner to be preferentially orientated to a predetermined axis thereof. A process for preparing such film is also disclosed.

Abstract: A method for coating quartz with a protective boron nitride film constitutes heating the quartz member to a temperature of 900.degree. C. to 1000.degree. C. in a stream of inert gas. After heating the quartz member to the desired temperature, the flow of inert gas is discontinued, whereupon ammonia and diborane gases, mixed at a temperature of 200.degree. C. to 400.degree. C., are allowed to flow past the quartz member. The flow of mixed ammonia and diborane gases is maintained for a time sufficient to deposit a boron nitride film of desired thickness. The boron nitride is produced by chemical reaction between ammonia and diborane.

Abstract: A method for making a silicon dioxide coating on a surface of a substrate such as, for example, an alkali metal-containing glass sheet by dipping the substrate in a treatment liquid obtained by adding boric acid to an aqueous silicon dioxide-saturated solution of hydrosilicofluoric acid.

Abstract: A shaped article of a carbonaceous material characterized in that the carbonaceous material is impregnated with a borosilicate glass comprising 25 to 50 wt. % of SiO.sub.2 and 20 to 45 wt. % of B.sub.2 O.sub.3 as effective components.

Abstract: Low value resistor inks comprising a conductive component consisting of stannous oxide and molybdenum trioxide or a mixture of molybdenum trioxide and metallic molybdenum; a glass powder selected from the group consisting of a barium aluminum borate glass and a barium calcium borosilicate glass; and a suitable organic vehicle are improved by the addition of a TCR modifier. Cadmium oxide is added to raise the TCR value of the subject resistor inks, and ferric oxide, vanadium oxide or mixtures thereof is added to lower the TCR value thereof.

Abstract: Electrically conductive articles which comprise a non-conductive substrate having thereon a substantially uniform, electrically conductive dispersion of finely divided particles of ferroalloys, silicon alloys, or mixtures thereof, are described. The articles are useful as components of electrical switches, contacts, connectors, circuit boards or electromagnetic interference shields. The conductive portion of the article may be subsequently electroplated or electrostatically painted.

Abstract: The substrate is formed by a plate of boron nitride having a composition of 42% B, 53.5% N.sub.2, containing between 1.5 and 2.5% O.sub.2, and 1.5% Ca. The surface is increased in hardness and made non-friable by deposition of a glass film to a depth within the range of 10 to 15 microns. This deposit permits surface metallization and ensures cohesion of the boron nitride grains.

Abstract: A method for sealing a rim-like opening in a glass container is described. The surface of the opening is treated with tin and/or titanium oxide precursors and with or without one or more of the groups consisting of fluorides, sulfur oxides and sulfur oxide precursors and then overcoated with a chromium III organic metallic complex. A membrane comprising a thermoplastic film is pressed onto the coated opening surface and heated to cause glass-plastic adhesion, forming a closure. The coating steps may be applied to glass containers immediately after forming and annealing as appropriate, or may be applied to glass containers taken from storage.