Abstract: A data carrier (1) such as a paper of value or the like having an optically variable element (5, 6), in particular a hologram, applied to the surface, and an additional printed pattern (2), applied in particular by steel intaglio printing, wherein the surface of the data carrier (15, 16, 20, 21) is smoother in the area of the optically variable element than in the remaining surface.

Abstract: An AC powder type EL panel includes an AC powder type EL element, thermoplastic adhesive layers formed on all surfaces of the AC powder type EL element, and a pair of protective films adhered to cover substantially the entire surfaces of the thermoplastic adhesive layers and having end portions to be fused to each other to seal the AC powder type EL element. A thickness ratio of the protective film to the thermoplastic adhesive layer is within the range of 5:1 to 2:1. Since the thermocompression-bonded end portions of the thermoplastic adhesive layers having poor moisture barrier properties are not exposed between the protective films at the end portions of the AC powder type EL panel, penetration of external moisture into the panel can be effectively prevented.

Abstract: An organic thin film element is disclosed which has an organic thin film consisting of a mixed stacked charge-transfer complex of donor and acceptor molecules, wherein the organic thin film is made neutral by forming the mixed stacked charge-transfer complex which is ionic under the bulk state into a thin film.

Abstract: A circuit board comprising: a core material made from magnesium, a magnesium alloy, or a magnesium-based composite material, and an electric circuit formed on the core material. A process for producing the circuit board comprises the steps of (1) forming an electrodeposition-painted coating on such a core material, (2) forming a polyimide resin coating on the electrodeposition-painted coating, (3) forming a via hole extending through the resin coating to the underlying electrodeposition-painted coating, (4) etching and removing the electrodeposition-painted coating in the region exposed in the bottom of the via hole while masking the other region with the resin coating thereby extending the via hole to the core material, (5) forming a metal film on at least a free surface of the resin coating and an inner surface of the extended via hole, and (6) etching the metal film by using a photoresist mask to form a conductor layer having a predetermined pattern.

Abstract: A substantially transparent wear resistant member wherein a dielectric layer is coated on a support such as glass. Wear resistance is enhanced by reducing fine-scale surface roughness of the dielectric layer.

Abstract: A conductive substrate and electrostatic recording media which incorporates such a conductive substrate are disclosed. The disclosed conductive substrate and recording media are applicable to electrostatic recording processes, electrophotographic printing processes and the like, and demonstrate excellent resistance to damage by water and other environmental factors. The conductive substrate of the present invention includes a substrate layer with at least one surface thereof having a conductive layer formed thereover. The above mentioned conductive layer has as a principle component an acryl type copolymer formed from polymerizable vinyl monomer of the type shown in chemical structural diagram 1 below in an amount of 10 to 45% by weight of the acryl type copolymer, and at least one other type of polymerizable vinyl monomer, ##STR1## such that in chemical structural diagram 1, R.sub.1 represents a hydrogen atom or a methyl group, R.sub.2 represents an alkylene group, R.sub.3, R.sub.4 and R.sub.

Abstract: A flame-resistant cover film for flexible circuit boards having excellent flame-resistance, handling, and storage qualities may be produced by treating an insulating film of a nonwoven polymer fabric with a flame-resistant, halogen-free polymeric adhesive. The polymeric adhesive comprises an aqueous mixture of a copolymerizate of acrylic acid esters and styrene, and an aminoplastic or phenoplastic precondensate to which a mixture of fine-particle red phosphorus and fine-particle ammonium polyphosphate is also added.

Abstract: A ceramic substrate is used for an electric or electronic circuit, and comprises a ceramic foundation and at least one conductive island formed of aluminum or an aluminum alloy and bonded to one surface of the ceramic foundation for providing conductive paths to circuit components connected thereto, wherein the aluminum or aluminum-alloy island is brazed to the ceramic foundation with a brazing alloy selected from the group consisting of aluminum-silicon alloy, aluminum-germanium alloy, aluminum-silicon-magnesium alloy and aluminum-silicon-germanium alloy so that thermal stress between the ceramic foundation and the conductive island is taken up.

Abstract: A flexible circuit such as a membrane probe (10) is made by forming a trench (50, 60) in the upper surface (39) of a polyimide substrate (38) with a trench base (52, 62) spaced below the upper surface. The trench has an end wall (54, 64) ramped at an obtuse angle to the substrate upper surface and the trench base. A conductive layer deposited on the upper surface is patterned to form a line trace (44, 46) extending continuously over the substrate upper surface, down the ramped end wall and along the trench base, to contact a ground plane or form a distributed capacitance. An excimer laser is used, at a wavelength of 308 nm., an energy density less than 0.54 J./cm.sup.2 (preferably 0.18 to 0.35 J./cm.sup.2), and a pulse frequency of about 100 Hz., to ablate successive incremental thicknesses (80) of polyimide from the substrate in sweeps of depthwise decreasing length.

Abstract: An optical information recording medium, such as an optical disk, includes a meandering guide groove being varied in period according to first additional information and in amplitude according to second additional information. The optical information recording medium enables recording a plurality of kinds of information in addition to the first and second additional information in accordance with a multiple recording system.

Abstract: An absorbing assembly for absorbing electromagnetic radiation in the range 10 MHz to 100 GHz comprises a lossy dielectric material and chiral elements disposed outside the lossy dielectric. The chiral elements may be springs, moebius bands, irregular tetrahedra, tapering helical springs, screws or handed non-planar forks.

Abstract: A thin film of molten polypropylene resin extruded from a T die is pressed and cooled with a chill roll equipped with a hologram relief master plate on its peripheral surface, whereupon a hologram pattern is simultaneously formed as an integral part of the polypropylene resin sheet being molded. Since the polypropylene resin has a Rockwell hardness of at least 70, the hologram pattern formed in the resulting hologram forming sheet is less likely to be damaged or lost during subsequent processing.

Abstract: A heated glazing suitable for an aircraft window including, two or more rigid sheets of glass and a network of fine metal resistance wires. Power lead-in strips providing power to the metal resistance wires are separated from one of the rigid glass sheets by a layer of polytetrafluoroethylene (Teflon) or a similar material which allows relative sliding between the power lead-in strips and the rigid glass sheet.

Abstract: A pop-up, self-supporting, rolling greeting card includes a pop-up polyhedron with opposing end panels to which are mounted circular panels for supporting the card on its end in a rolling configuration. The polyhedron is collapsible into a generally flattened configuration to facilitate placing the card in an envelope and sending it through the mail or the like.

Abstract: A removable floor surface is provided with slick, thin strips of nylon for use in moving a heavy household appliance without lifting of the heavy appliance and without damage to a common floor covering such as vinyl or wood, comprising four such strips in two matching pairs: a first pair of temporary strips to facilitate displacement of the appliance away from its normal location and a second pair of removable stationary strips for continued support of an appliance in its usual location. On each temporary strip is provided a removable ramp on a first end to facilitate initial raising of the appliance onto the first pair of strips without lifting.