Abstract: An improvement is disclosed in the matrixing process employed in the manufacture of molded records. The improvement consists of using an insert in the matrixing process which is secured to the center portion of the matrix to be duplicated prior to electroforming a replica on the surface of the matrix. Metal is then electroformed over the surface of the matrix and the insert to form the replica and the insert is thereafter used to apply force at the center portion of the replica to force it away from the matrix on which it is formed.

Abstract: A self-aligned method of implanting the edges of NMOS/SOS transistors is described. The method entails covering the silicon islands with a thick oxide layer, applying a protective photoresist layer over the thick oxide layer, and exposing the photoresist layer from the underside of the sapphire substrate thereby using the island as an exposure mask. Only the photoresist on the islands' edges will be exposed. The exposed photoresist is then removed and the thick oxide is removed from the islands edges which are then implanted.

Abstract: The invention is an improved light emitting device comprising a light emitting element mounted on a header wherein the improvement comprises a thin layer of copper overlying the surface of the header including both the base and the stud. A large increase in the yield of useable devices is obtained for a light emitting element mounted on the header which emits between about 1.0 and about 1.7 micrometers.

Abstract: A semiconductor laser having anti-guiding regions extending through the second confinement layer towards but not intersecting the active layer on both sides of the region of the confinement layer over a land between the grooves in the substrate. These anti-guiding regions serve to suppress higher order lateral optical modes by creating large radiative losses for these modes.

Abstract: A method of forming low resistance silicided gates or interconnects is described wherein a refractory metal and silicon is simultaneously co-deposited to form a composite layer which is thereafter heat treated in a non-oxidizing atmosphere to form the polycrystalline state of the silicide.

Abstract: Method and apparatus are provided for determining the diffusion length of minority carriers in semiconductor material, particularly amorphous silicon which has a significantly small minority carrier diffusion length using the constant-magnitude surface-photovoltage (SPV) method. An unmodulated illumination provides the light excitation on the surface of the material to generate the SPV. A manually controlled or automatic servo system maintains a constant predetermined value of the SPV. A vibrating Kelvin method-type probe electrode couples the SPV to a measurement system. The operating optical wavelength of an adjustable monochromator to compensate for the wavelength dependent sensitivity of a photodetector is selected to measure the illumination intensity (photon flux) on the silicon. Measurements of the relative photon flux for a plurality of wavelengths are plotted against the reciprocal of the optical absorption coefficient of the material.

Abstract: This invention relates to novel terpolymers of 3-methylcyclopentene, 2-cyclopentene-1-acetic acid and sulfur dioxide. Positive electron beam resist media prepared from the subject terpolymers possesses excellent sensitivity and development latitude and unexpectedly are developable with conventional aqueous alkaline developers.

Abstract: In accordance with this invention a porcelain coated metal board is provided which has flat surfaces and further has electrical connections between the face and reverse surfaces of the board. In accordance with a further aspect of this invention the boards of this invention are obtained by a method in which the connecting pins are sealed in a spaced relationship in apertures in the metal core of the board and insulated from the core prior to the application of the porcelain to the surfaces of the core.

Abstract: A novel hydrogen rich single crystal silicon material having a band gap energy greater than 1.1 eV can be fabricated by forming an amorphous region of graded crystallinity in a body of single crystalline silicon and thereafter contacting the region with atomic hydrogen followed by pulsed laser annealing at a sufficient power and for a sufficient duration to recrystallize the region into single crystal silicon without out-gassing the hydrogen. The new material can be used to fabricate semiconductor devices such as single crystal silicon solar cells with surface window regions having a greater band gap energy than that of single crystal silicon without hydrogen.

Abstract: A method for forming a perfluorinated polymeric film having improved adhesion to a substrate surface whereby the substrate surface is initially glow discharged in the presence of nitrogen, and then a polymeric film is deposited on the substrate surface by subjecting the surface to a glow discharge in the presence of a precursor comprising a compound selected from the group consisting of perfluorocycloalkanes, perfluorocycloolefins and perfluoroalkyl-substituted derivatives thereof.

Abstract: A method of determining the crystalline quality of heteroepitaxial silicon material, particularly silicon-on-sapphire (SOS) and of homoepitaxial silicon material which uses the light scattering is disclosed. The material is exposed to a beam of light of a selected wavelength, and scattered light having an intensity above a threshold is detected to provide a signal which is used to control the intensity of a display beam of a visual display device. The threshold is varied to thereby vary the display beam intensity so as to provide the minimum intensity of display beam which yields a full display. The value of the thusly adjusted threshold intensity is used as a direct measure of the quality of the material.

Abstract: An apparatus for holding a plurality of styli in a high-density configuration during processing comprises a holder having a slot with a closed end disposed adjacent a first surface thereof. The slot has a pair of longitudinal sides parallel to each other and separated by a distance greater than the diameter of a stylus but less than twice the stylus diameter. Attached to the holder at the end of the slot, opposite the closed end, is means for exerting a clamping force against a stylus disposed at one end of a stack of the styli juxtaposed in two rows oriented along the slot. The exerting means is adapted to push the styli toward the closed end of the slot and thereby effectively hold the styli within the slot.

Abstract: A technique for aligning a surface of a workpiece with respect to a positioning ring attached to a holder supporting the workpiece comprises mounting the holder on an alignment platform adjacent a positioning block attached thereto for holding the positioning ring in a predetermined position. The holder is adapted to rotate the workpiece, with respect to the positioning ring, about a first axis, and the alignment platform is supported by a table. The surface of the workpiece is exposed to an incident light beam, whereby the incident beam is reflected from the surface, as a reflected beam, onto a screen along a path of alignment marks disposed thereon. The surface is then rotated about the first axis to change the location where the reflected beam strikes the screen, whereby the surface is properly aligned with respect to the positioning ring when the reflected beam strikes a particular location on the screen.

Abstract: Bis(hydroxyalkyl)disiloxane lubricants of the formula ##STR1## wherein R.sub.1 and R.sub.3 are methyl or ethyl and R.sub.2 and R.sub.4 are linear alkyl groups of up to 20 carbon atoms. These compounds are useful as additives to methyl alkyl siloxane lubricants for conductive high density information discs. Discs lubricated with the lubricant mixture exhibit improved stability to environments of high temperature and high relative humidity.

Abstract: High density information discs comprising a conductive carbon-loaded polyvinylchloride disc are lubricated with a polyphenylene ether containing a polar dopant substituted with a long chain alkyl group in amounts sufficient to reduce surface tension of the polyphenylene ether to enable adequate wetting of the disc surface. The successful application of this doped lubricant provides the discs with excellent lubrication, highly resistant to oxidation, moisture and shear stress.

Abstract: High density information records comprising a conductive carbon-loaded polyvinylchloride record are lubricated with a fractionated methyl alkyl siloxane lubricant which contains at least two dopants in an amount sufficient to reduce sensitivity of the records to moisture.

Abstract: An improved method of curing compositions of a monomer containing one or more acrylate moieties coated on a substrate is provided wherein the monomer composition is exposed to sulfur dioxide gas in the presence of a free radical initiator having a hydroperoxide moiety.

Abstract: A technique for manufacturing a uniform configuration for at least two video disc styli, each stylus having a shank and a tip at one end of the shank, comprising the step of attaching an edge of a first plate of shank material to one edge of a strip of tip material different from the shank material, the strip having a face thereof oriented along a predetermined crystallographic plane. The strip is cut into the individual tips while the plate remains attached to the strip. The plate is then separated into the individual shanks to form the separate styli, whereby the orientation of the crystallographic plane with respect to the shank is uniform for all styli.

Abstract: A method for thermogravimetrically analyzing a plastic molding composition comprising carbon black and a vinyl chloride homopolymer or copolymer molding resin to determine the carbon black content wherein the method comprises the steps of compounding the molding composition so that the carbon black is uniformly dispersed therein, heating the molding composition in an inert atmosphere to a temperature sufficient to reproducibly thermally decompose the vinyl chloride homopolymer or copolymer, maintaining the molding composition at the decomposition temperature in an inert atmosphere for a first given time which is long enough so that there is no further significant weight loss, weighing the molding composition to determine the weight loss during the first given time and comparing the weight loss for the first given time with that for samples of known composition analyzed under the same conditions to determined the carbon black content of the molding composition.

Abstract: A method of forming reference flats on a plurality of styli comprises the step of placing the styli lengthwise in parallel grooves disposed adjacent the surface of a first plate, allowing the top portions of the styli to project above the surface. A coating of wax is applied to the flat surface of a second plate. The wax-coated second plate is then pressed against the surface of the first plate until the top portions of the styli are held firmly against the surface of the second plate, after which the second plate is lifted from the first plate with the styli remaining adhered to the second plate. The exposed portions of the styli are lapped to form the reference flats by moving an abrasive surface in a direction along the lengthwise orientation of the styli.