Abstract: The present invention relates to a copper base alloy consisting essentially of from about 3.5% to about 6.0% aluminum, from about 0.1% to about 3.0% nickel, from about 0.03% to about 1.0% magnesium and the balance essentially copper. The alloys of the present invention have been found to be cost effective and easily processable. They have also been found to have particular utility in electronic and electrical applications such as electrical connectors.

Abstract: The present invention is directed to a cermet material comprising a matrix of metal or alloy with ceramic particles distributed therein. The cermet includes a glass binder for bonding between the metal or alloy and the ceramic particles.

Abstract: Disclosed is an electrolytic cell used to produce dilute quantities of a halogen solution from water containing dilute quantities of salt to disinfect and sanitize the water, the cell further employs monopolar electrodes of trapezoidal shape and an electrode separating plates that ensures proper alignment and equal separation of the electrode plates during operation.

Abstract: The present invention is directed to the process of forming a multi-layer or hybrid circuit assembly. The assembly includes at least one ceramic substrate having a deoxidized or oxygen free copper alloy foil bonded thereto by a bonding glass. The copper alloy foil may be a circuit to which a resistive metal alloy tape can be bonded so as to provide a path of precise resistance. Also, layers of foil may be glass bonded to a substrate and stacked to form multi-layer circuits.

Abstract: A process and apparatus for fabricating an optical fiber communication cable are described herein. The optical fiber cable has a cable core including a metal containment tube and at least one optical fiber within the tube. The containment tube preferably is formed by drawing a strip of metal through at least one forming die. In a first aspect of the present invention, smooth operation of the forming die is promoted by first passing the metal strip through a shaving die to remove any shearing burrs along the strip edges and to maintain the width of the strip within a desired tolerance.In a second aspect of the present invention, various approaches for effectively sealing the containment tube are described. In a first embodiment, the tube is sealed using a wave soldering approach wherein a flow of moving molten solder is used to substantially fill a seam in the tube.

Abstract: Disclosed is an aqueous developing solution containing a quaternary ammonium hydroxide developing agent, and as an additive an effective amount of a select compound which is either 1,3,5-trihydroxy benzene, 4-methylesculetin or a novolak-type resin. The aqueous developing solution is particularly useful in developing an imagewise-exposed layer of a positive-working photoresist composition containing a novolak-type resin and a photosensitive agent. In such application, it has been found that the developing solution more effectively removes the exposed portions of the photoresist composition without leaving a residue of exposed photoresist composition at the interface of the edges of the unexposed portions of the photoresist composition and the oxidized silicon substrate.

Abstract: The present invention relates to iron-nickel alloys having improved glass sealing properties. Alloys of the present invention contain from about 30% to about 60% nickel, from about 0.5% to about 3% silicon, from about 0.5% to about 3.5% aluminum and the balance essentially iron. Preferably, the alloys have a total aluminum plus silicon content of less than about 4%. The alloys of the present invention have particular utility in electronic and electrical applications. For example, they may be used as a lead frame or a similar component in a semiconductor package.

Abstract: In a plural component foam dispensing apparatus there is provided an easily removable and replaceable combination nozzle-mixing chamber that is formed of a low friction, slightly deformable material with a first front contact surface against which is applied force to load the second rear contact surface against the contact surface of the nozzle seat to securely hold the combination nozzle-mixing chamber in place. The core of the combination nozzle-mixing chamber is not axially restrained on each end.

Abstract: The present invention relates to a technique for forming silicon carbide coated porous filters for use in filtering molten metal, especially copper and copper alloy melts. The technique comprises preparing a silicon carbide containing slurry having a viscosity in the range of about 1 to about 50, preferably from about 5 to about 30, centipoise and impregnating a rigid porous substrate material with the slurry. In a preferred embodiment, the slurry contains mono-aluminum phosphate as a binding agent, ethylene glycol as a wetting agent, powdered silicon carbide having a maximum settling rate of about 0.1 mm./min. and the balance essentially water. After draining of the excess slurry, the coated substrate material is heated to substantially prevent foaming of the coating during firing and fired to bond the silicon carbide coating to the substrate material.

Abstract: An electrostatic charge is selectively applied to the anodized surface of an anodized aluminum plate in a predetermined pattern corresponding to the image to be printed, a liquid toner is applied to the charged portions of the anodized surface and the toner is fixed to the anodized surface to provide an imaged lithographic printing plate. The printing plate made by the method may be used to make lithographic prints by applying printing ink to the imaged portions of the plate and transferring the printing ink from the lithographic printing plate to a substrate.

Abstract: A graded seal assembly adapted for hermetically sealing a semiconductor package is disclosed. First and second members having first and second coefficients of thermal expansion respectively are provided. A leadframe is disposed between the first and second members. A first sealing glass is bonded to opposite surfaces of the leadframe and is disposed between the leadframe and the first member for sealing the leadframe to the first member. The second sealing glass is bonded to the second member. The second sealing glass has a third CTE which has a mismatch of less than about 5.times.10.sup.-7 in/in/.degree.C. with said second member. A graded interface zone having stratified layers fuses the first and second sealing glasses. Each of the layers in the zone has a coefficient of thermal expansion which is mismatched less than about 5.times.10.sup.-7 in/in/.degree.C. with an adjacent layer to absorb thermal stress formed by exposure of the semiconductor package to thermal cycling.

Abstract: A process for step etching a metal tape adapted for use in tape automated bonding comprises forming an etch resist pattern on the tape having a first portion defining a pattern of leads and a second portion within the first portion defining steps in the leads. The metal tape is etched in the regions not covered by the resist at a desired rate and etched in the regions for forming the step at a reduced rate as compared to the desired rate, thereby forming the tape having a plurality of leads corresponding to the resist pattern with each of the leads having a step therein generated by the second portion of the resist pattern. The metal tape formed by the process has a unique structure wherein the web between bumps formed at the end of the leads and the remainder of the leads has a unique channel beam cross section for stiffening the web which is relatively thin as compared to the leads or the bump.

Abstract: Oxazolidone-containing isocyanurate foams characterized by thermal stability at a temperature of about 140.degree. C. or higher. These foams are produced by reacting at least one polyisocyanate with at least one polyepoxide in the presence of catalyst, surfactant, and blowing agent.

Abstract: The present invention relates generally to open-cell polyurethane foams and, more specifically, to such foams which are halogenated-hydrocarbon blown and are essentially urea-free, together with a composition and method for the fabrication thereof.

Abstract: The present invention relates to techniques for producing magnetic particles for use in recording media. The process of the present invention generally comprises providing an alloy capable of forming a magnetic precipitate, aging the alloy to form a magnetic precipitate comprising a plurality of magnetic particles dispersed throughout a surrounding matrix; and dissolving the matrix to leave the magnetic particles. The dissolution of the matrix is done electrochemically using a pyrophosphate solution.

Abstract: The present invention is directed to the process of forming a multi-layer or hybrid circuit assembly. The assembly includes at least one ceramic substrate having a layer of foil bonded thereto by a high temperature organic adhesive. The foil may be etched and have a resistive metal alloy tape can be bonded so as to provide a path of precise resistance. Also, layers of foil may be bonded to a substrate and stacked to form multi-layer circuit assemblies.

Abstract: A stable, low viscosity polymer/polyisocyanate dispersion wherein the polymer is produced by polymerizing an ethylenically unsaturated macromolecular monomer with another ethylenically unsaturated monomer, together with a polyurethane foam, elastomer, adhesive, sealant, or coating produced therefrom and a method for fabricating the foam.

Abstract: An electrolytic cell is provided with electrodes which are inserted within electrode frames with internal flow conduits and which are formed by metallurgical bonding, and the use of adhesives and an electrical resistance lowering conductive compound between contact surfaces.

Abstract: A process for continuously producing double base propellant powder of a low density (specific gravity 1.15 to 1.275). This process uses a salt-free liquor.

Abstract: The present invention relates to a process and apparatus for forming in situ surface treated metal foil. The apparatus includes a cathode and anode arranged and/or shaped to define a plating region characterized by a first zone having a first interelectrode gap and a second zone having a second interelectrode gap smaller than the first interelectrode gap. It has been found that by providing such an arrangement it is possible to generate in the first zone a localized current density below the limiting current density sufficient to plate metal foil onto the cathode and to simultaneously generate in the second zone a localized current density above the limiting current density sufficient to form dendrites on the freshly produced foil.