Abstract: An improved information storage and recovery system comprising a playback stylus, having a dielectric support element and a conductive electrode, and a grooved conductive disc record in which information is recorded. The information is recovered on playback while there is relative motion between the record surface and the stylus by sensing capacitive variations between the stylus conductive electrode and the record surface. The improvement comprises employing that angle between the electrode face and the record surface such that the respective paths of dielectric effects between the electrode face and the record surface both in the direction of relative motion and in the direction opposite the direction of relative motion are balanced.

Abstract: An improvement in the etching of aluminum utilizing a carbon-containing etchant gas is provided whereby the residues remaining after etching are treated in a nitrogen glow discharge for a time effective in removing them or rendering them susceptible to removal by conventional means.

Abstract: A method of anisotropic etching of aluminum or an alloy thereof comprising using as the etch gas a mixture of boron trichloride, trichloromethane and hydrogen. The etchant mixture advantageously also contains nitrogen and helium.

Abstract: An improved information storage and playback system comprising a playback stylus and a disc record. The information is recorded in the surface of the disc record and there is relative motion between the disc and the playback stylus during recovery of the recorded information. The stylus is fabricated out of a dielectric support material and contacts the record disc surface during the recovery of the information. The improvement comprises employing a playback stylus whose dielectric support material is single crystal magnesium aluminate spinel. The spinel composition comprises a ratio of MgO to Al.sub.2 O.sub.3 of from about 1:1 to about 1:2.5.

Abstract: Novel thick-film crossover dielectric inks useful in constructing multilayer circuits on suitable substrates are provided. The subject inks comprise a barium magnesium borosilicate glass powder, a pinhole reducing component comprising silicon dioxide, an alkaline earth aluminum borosilicate glass having a high softening point or mixtures thereof and a suitable organic vehicle.

Abstract: A system and process for the safe supply, distribution, and delivery of a highly volatile and flammable liquid from a contained source of supply of the liquid remote from a closed work environment to a process area within the closed work environment includes a pipeline extending from within the contained supply to the process area within the closed work environment to provide for the delivery of the liquid from the supply to the process area. The system further includes a protective casing spaced from and completely enclosing the pipeline from a point on the pipeline adjacent the process area to a point on the pipeline closely adjacent the pipeline's entry into the closed work environment. The protective casing opens outwardly of the closed work environment to thereby trap within the space existing between the casing and the pipeline any vapors that may be escaping from the liquid within the pipeline for exhausting of the same outwardly of the closed work environment.

Abstract: Novel thick-film crossover dielectric inks useful in constructing multilayer circuits on suitable substrates are provided. The subject inks comprise a barium magnesium borosilicate glass powder, a pinhole reducing component comprising silicon dioxide, an alkaline earth aluminum borosilicate glass having a high softening point or mixtures thereof and a suitable organic vehicle.

Abstract: A method for separating out carbon particles from a composition comprising a plastic and carbon particles of submicron dimensions comprising the steps of adding the composition to an organic solvent for the plastic which does not dissolve the carbon particles at a concentration sufficiently dilute to allow the carbon particles to be free from the plastic and filtering the resulting mixture in a calcium carbonate column which traps essentially all of the carbon particles.

Abstract: An improved method of etching a silver-doped germanium selenide resist film utilizing as the etchant gas sulfur hexafluoride.

Abstract: A simple, reliable, and inexpensive method for cleaving small diameter optical fibers comprises the steps of heating the fiber at a point along its length by contacting the fiber with an electrically heated wire and contacting the fiber, including the heated portion, with a volatile liquid whereby the fiber is cooled. The fiber may be cooled by spraying it with a liquid fluorocarbon.

Abstract: A vertical MOSFET structure which includes a drain which comprises a high conductivity region and a low conductivity region. The high conductivity drain region is contoured so as to minimize the device turn-on resistance without degrading the device breakdown voltage.

Abstract: A fixture for use within an epitaxial deposition reactor includes a box adapted to receive a semiconductor substrate. The box is movable to a position of reactant gas flow within the reactor and it includes a porous cover. A stagnant mixture of reactant gases is maintained between the substrate and the cover while the box is within the zone of reactant gas flow.

Abstract: A vertical MOSFET device having source, body and drain regions, includes an anode region in series with the drain region. The source, body and drain regions have a first forward current gain and the anode, drain and body regions have a second forward current gain, such that the sum of the current gains is less than unity. The anode region provides minority carrier injection into the drain region, enhancing device performance in power applications.

Abstract: An apparatus for molding a recorded disc includes a pair of mold plates, at least one of which is movable toward and away from the other, and adapted to form a mold cavity therebetween, a center hold forming pin slidably mounted in one of the mold plates and a center plate in the other mold plate opposite the center hole forming pin. The center hole forming pin and/or the center plate includes a removable end plate at its surface which is harder than the rest of the center hole forming pin or center plate. The harder end plate has longer wear properties and can be easily and quickly replaced when it does become worn.

Abstract: The preferred embodiment of a method of making a buried channel CCD starts with a body of P type semiconductor material over which an oxide layer and a photoresist are deposited. Openings are formed to expose regions of the body surface where drains are to be formed and N type impurity atoms are implanted through the openings. The openings are then enlarged to expose an additional area of the surface surrounding the drains and P type atoms are implanted through the enlarged openings to form channel stops. Afterward, the surface of the body is exposed and N type atoms are implanted to form buried channel regions on each side of the channel stops and to convert a thin layer of the channel stops to lightly doped compensation regions extending between the drains and the buried channel regions.

Abstract: In a method of making a CCD imager on a semiconductor wafer, it is usual to have the imagers spaced from the outer periphery of the wafer. The method includes a sequence of steps including masking the appropriate surface of the wafer, defining openings in the mask and forming doped regions in the wafer through the opening. In accordance with this invention, the region of the semiconductor wafer adjacent the outer periphery is not doped during any doping steps. It has been found that with this method, dislocations do not nucleate and propagate into the area of the wafer where the CCD imagers are to be formed and that white spots and lines in the visual image formed from the imager are significantly reduced.

Abstract: A method for preparing a plastic lapping disc overcoated with an abrasive silicon oxide layer. The method comprises the steps of introducing the silicon oxide precursors into an evacuated chamber containing the plastic lapping disc wherein a first major surface of the plastic disc is substantially covered during the glow deposition. The precursors are then subjected to a glow discharge. An abrasive silicon oxide layer is deposited on a second major surface of the disc opposite the first major surface.

Abstract: An ion implanter apparatus is described with provision for neutralizing the space charge potential of the ionic beam with a closed loop feedback system responding to the electrical charges that tend to accumulate on a target specimen. Neutralization is provided by a controllable electron source surrounding the beam. Flow of electrons to a plate radially outward of the electron source is used to derive a signal proportional to the beam ion current when the space charge potential of the beam is neutralized. The beam current signal can be used (1) to provide a read-out display for the operator; (2) to control the magnitude of the ion beam; (3) to be integrated to determine the total positive charge that enters the Faraday cage of the implanter for use to control the ion beam shutter; or (4) to effect relative movement of the specimen and the beam.

Abstract: There is disclosed apparatus for growing a ribbon of crystalline material which apparatus comprises a furnace adapted to contain a melt from which the ribbon is to be grown and crystal pulling means spaced from the furnace and including crystal seed holding means and sliding means moving said crystal seed holding means toward and away from the furnace. Extending between the furnace and the crystal seed pulling means are inner and outer bellows means spaced apart from each other to define a space therebetween. This space may be purged with an inert gas when pulling crystal.

Abstract: An anode assembly is provided for use in the electroforming of record matrixes. The anode assembly is comprised of a pair of spaced apart anode baskets for holding a supply of the metal to be electrodeposited, an electrolyte distribution manifold positioned between the baskets and a pair of anode shields positioned in front of each of the anode baskets for focusing the electroforming forces from the anode.