Abstract: The present invention is directed to a process and composition for accelerating the activation of a polymeric surface prior to the electroless plating thereof, wherein there is employed a solution comprising a relatively dilute inorganic acid and a metal salt desirably selected from the group consisting of nickel, cobalt and ruthenium. There may also be employed a compound cabable or ionizing to produce a source of fluoride ions. By so proceeding, microscopic cavities in the polymeric substrate are thoroughly cleansed of residual tin ions which remain subsequent to rinsing of the polymeric body following the conventional activation step employing an acidic solution of pollodium chloride and stannous chloride. The removal of palladium ions, which have a catalytic effect in the electroless plating operation, is minimized by the composition and process of this invention, and further, in addition to other advantages, there is achieved relatively low and uniform values of part resistance and contact resistance.

Abstract: A process for producing an integrated circuit having a pair of complementary field effect transistors, one being a J-FET and the other being a MIS-FET. The process includes a series of masking and ion implantation steps carried out in part for both transistors at the same time. The doping of the region between the source and drain is increased for the MIS-FET at the same time that the doping of the channel of the J-FET is increased in order to control the threshold voltage of the MIS-FET.

Abstract: A method of making electric cable having a plurality of electric conductors stranded together with a deformable semi-conducting strand in each valley between the conductors and a shielding composition around and in intimate contact with the conductors and strands. The conductors and strands are stranded together into a stranding die and the plastic composition is forced around them while they are in the stranding die.

Abstract: The raw metal edge on the inside lap in an adhesively-bonded lap side seam of a tubular body is protected from chemical attack by a corrosive substance from within the tubular body by applying a side seam adhesive along one marginal edge portion of the body blank, bending the other parallel marginal edge portion of the blank to form a crease thereon, rolling the blank into tubular form to place the adhesively-coated marginal edge portion and the creased marginal edge portion in an overlapping, facing position, and imbedding the creased marginal edge portion into a portion of the adhesive on the one marginal edge portion to bury the raw metal edge, the imbedding being achieved by compressing the overlapped marginal edge portions together to assemble the lap side seam of the tubular body.

Abstract: A one-step powderless high-speed process for producing photoengraved letter-press printing and pattern plates from magnesium and alloys thereof by etching such plates in a machine that directs against a surface of the plate droplets of an etching liquid comprising an aqueous solution of a strong inorganic acid and adjuvants.

Abstract: A labelling device having a main body member mounted on its frame for rotation about a central axis. The device includes a labelling station, a glue applicator station and a label applicator station circumferentially spaced about a central axis. At least one arm member is slidably mounted on the main body member and projects radially from the central axis. A head is pivotally mounted on each arm for movement about a secondary axis parallel to the central axis. The head has an outer surface which is curved in the plane of rotation of the head about the central axis and is rotatable with the main body with the outer surface disposed in a path passing through the label storage, glue applicator and label applicator stations. The outer surface of the head has a leading edge disposed in the direction of rotation of the main body and a trailing edge disposed in the opposite direction.

Abstract: In welding apparatus of the type comprising a pair of opposed pressing boards, and a heated platen inserted into and retracted from a space between the pressing boards and the surfaces of the articles to be welded together are fused by the heated platen and then welded together by applying a pressure to the articles, there are provided holding mechanisms for holding the article at the opposing surfaces of the pressing boards and a spacer for defining predetermined gaps between the heated platen and the pressing boards.

Abstract: A composition based on butyl rubber resins and filler particularly useful for hot melt application as a sealant for combining a plurality of glass panes in an insulating glazing unit in which improved workability in heated condition is secured without adversely affecting its other properties through inclusion of a minor amount of a thermoplastic block copolymer of polystyrene and polybutadiene or polystyrene and polyisoprene.

Abstract: A solution for removing a diffused aluminium coating from a component made of nickel or cobalt base high temperature alloy, consisting of Nitric Acid 57%, Sulphuric Acid 29% and Water 14%. The solution removes all but traces of nickel or cobalt-rich aluminides and does not attack the substrate material. If said traces have to be removed also, there is used an etching solution consisting of Ferric Chloride Solution 85%, Sulphuric Acid 10% and Hydrofluoric Acid 5%.

Abstract: A matrix array of semiconductor diodes formed in an epitaxial layer of a semiconductor wafer and being dielectrically isolated from each other by two orthogonal sets of parallel insulating oxide regions, one set extending completely through the epitaxial layer and the other set extending only partially through the epitaxial layer. A preferred method of forming the matrix array is also disclosed.

Abstract: A sealing wheel has a pneumatic tire with means whereby the flexure of the tire may be altered to compensate for dimensional differences in associated parts so that a required sealing pressure may be maintained. In one embodiment, a plurality of sealing wheels are mounted on a common shaft, the tire of each wheel being coupled with a source of compressed air, the air line for each tire having a pressure regulator so that the several tires may be regulated independently of each other, or coupled with a common source so that all tires may be regulated together. In one embodiment of the invention there may be a partial filling of the tire with liquid of a type which will bring about a more even distribution of heat where there is heat sealing.

Abstract: A simplified, low-cost method and apparatus for transferring inked design images from preprinted, design bearing waxed sheets to elongated, cylindrical, solid wax candle bodies or the like which permits gravure or lithographically applied halftone and shaded design images to be used as candle decorations, eliminates costly and tedious manual operations characteristic of decal applications and other prior methods and devices, and produces a finished candle having perfectly aligned decorative images thereon which are not susceptible to undesirable torching as the candle burns. The method comprises applying a design-bearing, waxed sheet to the candle body in closely conforming relationship thereto while the latter rotates in pressurized, bridging engagement between a pair of spaced, adjacent, rotating transfer rollers.

Abstract: An A-B etchant is applied to a (100) surface of a body of semiconductor material, a portion of which along the (100) surface of the body is either gallium arsenide or gallium aluminum arsenide. The etchant is applied for at least 15 seconds at a temperature of approximately 80.degree. C. The A-B etchant is a solution by weight percent of 47.5%, water, 0.2% silver nitrate, 23.8% chromium trioxide and 28.5% of a 48% aqueous solution of hydrofluoric acid. As a result of the application of the A-B etchant a pattern of elongated etch pits form having their longitudinal axes along the [011] crystalline direction. Grooves are formed in the body at a surface opposite the (100) surface on which was applied the etchant. The grooves are formed along the [011] crystalline direction by aligning the longitudinal axes of the grooves with the longitudinal axes of the etch pits.

Abstract: A method for insuring that the sidewall of a P+ PN+ layered junction mesa semiconductor structure is tapered smoothly from the P layer to the N+ layer of the structure upon formation thereof by immersion of a wafer comprised of the structure in an etchant of 3% HF and 97% HNO.sub.3, comprising the steps of placing an etch mask dot having a diameter slightly less than the greatest diameter required for the N+ layer above the P+ layer at a preselected site on the wafer, preselecting a specific ratio of etchant quantity to P silicon quantity, immersing the wafer in the preselected quantity of the etchant, and withdrawing the wafer from the etchant at the instant at which the silicon is removed from around the dot.

Abstract: A magnetic disc of improved durability is provided which has an undercoating of a relatively thick tin-nickel layer with a cobalt-containing magnetic layer over said tin-nickel layer and having an oxidized surface.

Abstract: A process for the seaming of two sheets of thermoplastic polymers, especially fabrics comprising thermoplastic fibres, by passing them around and through a pair of nip rolls and directing a pulsed laser beam at their line of confluence.

Abstract: Apparatus for laminating pieces of sheet material comprising a base of rigid material having a flat upper surface formed with a plurality of spaced apart perforations distributed substantially uniformly over the surface, a support member having a flat upper surface supporting an underside of said base and having a plurality of concentric interconnected grooves defined and in communication with said perforations, means for developing a partial vacuum in said grooves for causing fluid flow through said perforations around one or more pieces of sheet material placed in contact with the upper surface of the base, a cover of flexible, fluid impervious transparent sheet material movable between an open position out of overlaying relation with said base and a closed or overlaying position covering said base along with any pieces of sheet material places on the base to be laminated together and means for sealing around the periphery of said base and said cover when said cover is in said overlaying position.

Abstract: Apparatus and method for moving a pair of elongated members to engage and fold a length of flexible material into a series of loops. The apparatus includes moving means for moving both elongated members simultaneously on each side of the flexible material along first predetermined paths and translating means for translating the movement of the portion of each elongated member that engages the flexible material from its first predetermined path to a second predetermined path so that the elongated members will alternately engage the flexible material and urge it back and forth to form the series of loops.

Abstract: An improved process, and the apparatus for carrying out the process, of forming an elongated hollow body from fibre-reinforced synthetic resins. A plurality of resin impregnated support fibres are positioned over and extend longitudinally along a rotating mandrel, which support fibres are fed from a feed station having a plurality of spools thereon, which feed station rotates synchronously with the mandrel. The longitudinal support fibres form a fibrous substructure which rotates with the mandrel. A plurality of fibrous elements, also resin impregnated, are wrapped around the fibrous substructure to form the hollow body. The hollow body is gripped by a clamping device disposed at the discharge end of the rotating mandrel for pulling the hollow body and thereby displacing same longitudinally along the mandrel, which clamping structure simultaneously permits rotation of the hollow body with the mandrel.

Abstract: A process for fabricating narrow silicon members from a polycrystalline silicon layer, such as gates for MOS field-effect transistors. The edge of a mask is used to define a gap which exposes a narrow line on the underlying silicon layer. A doped region is formed in the silicon layer through the gap and then the layer is selectively etched. The critical dimensions of the fabricated silicon members are determined by the extent of diffusion of the dopant and are substantially independent of masking tolerances.