Abstract: The present invention relates to a package adapted to house an electronic device, such as a semiconductor integrated circuit. The package components are comprised of aluminum or an aluminum based alloy. At least a portion of the surfaces of the package components are anodized to enhance corrosion resistance and increase bond strength. The aluminum based packages are characterized by lighter weight than copper based packages and better thermal conductivity than plastic based packages.

Abstract: A monolithic catalyst bed for use in a catalytic gas generator includes catalytically-active metal screens having central openings and being composed of fine particles of catalyst supported by wires arranged in grid-like fashion. The bed also includes an injector tube having an end portion disposed through the central openings of the metal screens for mounting the metal screens in closely spaced side-by-side, stack-like relation extending outwardly from and radially about the tube end portion. The injector tube end portion is closed at its outer end and defines a passage for receiving an axial inflow of liquid propellant. The bed also includes an injector body supporting the injector tube and disposed at one end of the stack of metal screens, and a base plate mounted about the injector tube end portion adjacent to the closed outer end thereof and disposed at an opposite end of the stack of metal screens so as to define an annular space therebetween and about the injector tube end portion.

Abstract: A molten metal gas-atomizing spray-depositing apparatus has an atomizer which employs a pressurized gas flow for atomizing a stream of molten metal into a spray pattern of metal particles and for producing a flow of the particles in the pattern thereof along with the pressurized gas flow in a generally downward direction. The apparatus also has a substrate, such as composed of stainless steel, disposed in spaced relation below the atomizer with at least an upper surface layer of a glass thereon, being thermally softenable over a broad predetermined temperature range. The pressurized gas flow impinges on the glass surface layer of the substrate which receives a deposit of the particles in the spray pattern to form a product thereon.

Abstract: An apparatus and process for recrystallization of thin strip material includes a device for electromagnetically melting the thin strip material to provide a molten surface layer and a substantially solid core. Apparatus provides relative movement between the thin strip and the device for electromagnetically melting. Also, an apparatus resolidifies the molten surface layer to provide a preferred crystal structure in the thin strip material.

Abstract: In a method and apparatus for manufacturing a flechette load, a series of operative steps are carried out to produce a matrix-supported load of flechettes held in a desired array. First, a load of flechettes are mounted by a die end cap in a desired array in which at least the trailing end portions thereof are exposed and disposed in closely spaced side-by-side relation. Next, the die end cap is assembled to a die body such that at least the exposed trailing end portions of the flechettes are placed in the mold cavity of the assembled die. A mixture of expandable thermoplastic beads and, preferably, a bond weakening agent is also placed in the mold cavity with the mixture surrounding the exposed trailing end portions of the fletchettes therein. Finally, the mixture is heated so as to produce in the mold cavity directly on and about the exposed trailing end portions of the flechettes a matrix in the form of a solid foam body of a thermoplastic foam material.

Abstract: This invention relates generally to paints and paint bases and, more specifically, to a process and composition for providing reduced discoloration of paints and paint bases containing a pyrithione and ferric ion.

Abstract: A capsule and a method of making a capsule for use in the dissolution of a chlorine chemical compound into a body of water. The capsule comprises a tablet section having at least one chlorine compound tablet and a shell securely fitted about the tablet section. The shell has two apertures at opposite ends, each extension extending away from the tablet section and having a conduit communicating with an aperture to reduce the dissolving rate of the chlorine into the water. The ends of the extensions may be shaped to prevent the capsule from standing on its ends.

Abstract: A die set includes a punch for stamping a cavity in a work piece to produce a flat base surface and sidewalls which are perpendicular to the base surface. A forming bushing applies a deformation stress perpendicular to the stress applied by the punch to direct metal flow. In one embodiment, the impact surface of the punch contains piercing points to increase the depth of penetration of the punch.

Abstract: A semiconductor die attach system adapted for attaching a semiconductor die to a substrate is provided. A metallic buffer component for dissipating thermal stresses is disposed between the substrate and the semiconductor die to dissipate stresses created from thermal cycling of the substrate and the die. The metallic buffer component is sealed between the substrate and the die with a silver-tin sealing composition. A bonding material may be used alone to bond a die to a substrate and dissipate stresses from thermal cycling.

Abstract: A process for producing 1,2,4-triazol-5-one reacts an aqueous hydrazine solution with urea to form a reaction mixture of semicarbazide and ammonia, the reaction mixture is concentrated and an aqueous solution of a mineral acid added to form a slurry of a salt of semicarbazide. A formic acid compound is admixed with the slurry, and the slurry heated to produce 1,2,4-triazol-5-one. The novel process results in the production of a semicarbazide salt in situ and eliminates a number of process steps required in processes of the prior art.

Abstract: A molten metal gas-atomizing spray-depositing apparatus has an atomizer employing a pressurized gas flow for atomizing a stream of molten metal into a divergent spray pattern of metal particles and producing a flow of the particles in the pattern thereof along with the gas flow in a generally downward direction. The apparatus also includes a substrate movable continuously along an endless path and having an area thereon disposed below the atomizer for receiving a deposit of the particles in the spray pattern to form a product on the substrate being substantially uniform in thickness. The endless path of the substrate is generally elongated in the downward direction and thus extends parallel to the general downward direction of gas flow such that any particle overspray past the deposit-receiving area is carried by the gas flow downward past the substrate, substantially avoiding entrainment of the particle overspray in the product being formed on the substrate.

Abstract: An arcjet thruster has a body defining a constrictor and nozzle constituting an anode and forming an arc chamber. An elongated rod constitutes a cathode spaced from the constrictor by a gap generally coextensive with the arc chamber. An electrical potential is applied to the anode and cathode to generate an electrical arc in the arc chamber from the cathode to the anode. Propellant is supplied to the arc chamber with generation of the arc so as to produce thermal heating and expansion of the propellant through the nozzle. The thruster employs several features which improve its performance. One feature relates to the use of propellant blends with high specific impulse additives. Another feature relates to injection of the high specific impulse additive into the bulk propellant feed at the region of the cathode tip.

Abstract: A molten metal spray-depositing apparatus employs a magnetic field-generating nozzle for atomizing a molten metal stream into a spray of metal particles. The magnetic driving field generated by the magnetic atomizing nozzle generates eddy currents which produce an induced field in the metal stream opposing the driving field and creating a torque which causes the stream to break up upon exiting the driving field. The nozzle has one of two configurations for generating one of two generic magnetic field geometries. In one configuration the nozzle utilizes a pair of spaced magnetic poles, such as provided by Helmholtz coils, for generating a transverse magnetic field geometry across the stream. In the other configuration the nozzle employs a solenoid coil for generating a solenoidal magnetic field geometry parallel to the stream.

Abstract: A high energy solid explosive or propellant composition having low vulnerability to unplanned stimuli and desired mechanical properties, including a desired degree of hardness. Also claimed is a process for producing this composition.

Abstract: An electrode is provided which is formed by the metallurgical bonding technique of diffusion bonding the backplate, conductor elements and electrode surface together, then applying the catalytic coating to the electrode surface, and bonding the backplate to an electrical conducting plate.

Abstract: A high energy explosive or propellant composition having low vulnerability to unplanned stimuli and containing a polyurethane polyacetal elastomer binder. Also claimed is a process for producing this composition.

Abstract: A chlorine compound containing chemical tablet for dissolution into a surrounding body of water which includes an elongated tablet with length longer than thickness having an elongate central section connecting two opposing obliquely tapered ends along a longitudinal axis and an elongate tablet shell encasing the tablet having a corresponding elongate central section connecting two opposing obliquely tapered ends. The ends of the shell have openings therein and form an inwardly sloping and obliquely angled junction with the shell's elongate central section. The encased tablet lies in a skimmer unit on its side along a longitudinal axis and dissolves in a generally uniform and slow rate.

Abstract: An aqueous etchant solution made from water, hydrogen fluoride and a polyammonium fluoride salt selected from the group consisting of ethylenediammonium difluoride and diethylenetriammonium trifluoride.

Abstract: In a process for the production of Alkyl substituted 5-amidotetrazole compounds represented by the formula: ##STR1## wherein A represents NHX or NRR'X represents a lower alkyl groupR represents a lower alkyl group, andR' represents a lower alkyl group.reacts 5-aminotetrazole with an alkyl isocyanate or a dialkyl carbamoyl halide in a polar solvent.

Abstract: A method and the apparatus to perform the electrostatic transfer of a developed image from a permanent master to a receiving surface are provided whereby in a first generally horizontal direction the image is charged and developed and in an opposing second direction the developed image is transferred to a receiving surface and the master is cleaned. The master is electrostatically picked up and retained on flexible carrier means which are first moved in the first direction prior to the image transfer and then traversed by a transfer roller moving in the opposing second direction to effect the electrostatic pickup.