Patents Represented by Attorney Birgit E. Morris

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  • Photovoltaic device having increased absorption efficiency
    Patent number: 4126150
    Abstract: A photovoltaic device has a body which includes a thin film active region and a layer substantially transparent to solar radiation. The thickness of the transparent layer is such that a first antireflection condition is present for solar radiation at a wavelength which is relatively highly absorbed by the material of the active region. Furthermore, the combined thickness of the transparent layer and active region are such that a second antireflection condition is present for solar radiation at a wavelength which is poorly absorbed by the material of the active region. As a result of the prevailing antireflection conditions the solar radiation absorption efficiency of the photovoltaic device is increased.
    Type: Grant
    Filed: November 3, 1977
    Date of Patent: November 21, 1978
    Assignee: RCA Corporation
    Inventors: Alan E. Bell, Brown F. Williams, David E. Carlson
  • Self-illuminated liquid crystal display device
    Patent number: 4126384
    Abstract: A liquid crystal device includes a liquid crystal material encapsulated between two glass plates having electrodes on their inner surfaces. An illuminator is provided across the back of the liquid crystal device. The illuminator includes a radioactive material encapsulated between two glass plates. The inner surface of the illuminator plates are coated with a cathodoluminescent phosphor. One of the plates of the illuminator may be one of the plates of the liquid crystal device. The photons from the phosphor of the illuminator illuminate the liquid crystal device.
    Type: Grant
    Filed: August 13, 1976
    Date of Patent: November 21, 1978
    Assignee: RCA Corporation
    Inventors: Lawrence A. Goodman, Kenneth W. Hang, William B. Hall
  • Fabrication of multi-level relief patterns in a substrate
    Patent number: 4124473
    Abstract: Superposed multi-level diffraction gratings in photoresist can be etched into a substrate by using the photoresist as a masking pattern and by sputtering in a reactive fluoromethane plasma to a predetermined depth.
    Type: Grant
    Filed: June 17, 1977
    Date of Patent: November 7, 1978
    Assignee: RCA Corporation
    Inventors: Hans W. Lehmann, Roland W. Widmer
  • Electro-optic device
    Patent number: 4120567
    Abstract: Liquid crystal mixtures of liquid crystalline esters, biphenyls and terphenyls have wide useful temperature ranges, fast response times and a small index of refraction anisotropy which can be employed in liquid crystal cells having improved viewing angles.
    Type: Grant
    Filed: February 11, 1977
    Date of Patent: October 17, 1978
    Assignee: RCA Corporation
    Inventors: Lawrence Alan Goodman, Aaron William Levine, Dietrich Meyerhofer
  • Amorphous silicon photovoltaic device having an insulating layer
    Patent number: 4117506
    Abstract: In a photovoltaic semiconductor device, an electrically insulating layer is between and in contact with a body of amorphous silicon fabricated by a glow discharge in silane and a metallic film of a metal capable of forming a surface barrier junction with the amorphous silicon body. The insulating layer is of such a relatively thin thickness that charge carriers are capable of tunneling through the insulating layer. The insulating layer has been found to increase the open circuit voltage of the photovoltaic device without adversely affecting the short circuit current density of the device.
    Type: Grant
    Filed: July 28, 1977
    Date of Patent: September 26, 1978
    Assignee: RCA Corporation
    Inventors: David E. Carlson, Christopher R. Wronski
  • Organic welding flax composition
    Patent number: 4115157
    Abstract: Components can be held down on a printed circuit board without lead clinching by applying a non-flowing, water soluble mixture containing a polyalkylene glycol, a starch filler and a nonionic surface active agent over the components to keep them in place during soldering operations. The mixture can be completely removed after soldering by a water rinse.
    Type: Grant
    Filed: February 24, 1977
    Date of Patent: September 19, 1978
    Assignee: RCA Corporation
    Inventor: Marvin Packer
  • Method of assembling components on printed circuit boards
    Patent number: 4113524
    Abstract: An improved method of assembling components on printed circuit boards whereby trimmed component leads are placed into holes in the printed circuit board, and an extrudable, non-flowing, heat resistant, completely water soluble mixture is applied over and around the components to keep them in place. The components are then soldered to the board and the extrudable mixture washed away with water. The mixture is made from a solid polyalkylene glycol, an alkali metal soap, glycerine and water.
    Type: Grant
    Filed: February 24, 1977
    Date of Patent: September 12, 1978
    Assignee: RCA Corporation
    Inventor: George Katz
  • Photovoltaic device having an extended PN junction
    Patent number: 4112457
    Abstract: A photovoltaic device having essentially only a body of semiconductor material having a first region of one conductivity type in contact with a second region of the opposite conductivity type, forming a portion of the device PN junction therebetween. A plurality of pocket regions of the same conductivity type as the first region extend into the second region thereby further defining a portion of the PN junction in the second region.
    Type: Grant
    Filed: November 1, 1976
    Date of Patent: September 5, 1978
    Assignee: RCA Corporation
    Inventor: Robert Vincent D'Aiello
  • Liquid crystal cell
    Patent number: 4108793
    Abstract: Liquid crystal cells operable between wide temperature ranges (below 0.degree. C up to 84.degree. C) are provided. These cells include mixtures of compounds from the series ##STR1## WITH A COMPOUND FROM THE SERIES ##STR2## wherein n is an integer from 1 to 7 and m is an integer from 1 to 4.
    Type: Grant
    Filed: October 29, 1973
    Date of Patent: August 22, 1978
    Assignee: RCA Corporation
    Inventors: Joseph Anthony Castellano, Michael Thomas McCaffrey
  • Method of depositing or repairing a patterned metal layer on a substrate
    Patent number: 4107351
    Abstract: In a wholly additive process for depositing a patterned metal layer on an insulating substrate, the sensitized and activated substrate is coated with photoresist; a desired pattern is formed in the photoresist layer by exposing it to a mask and developing it using conventional techniques; the patterned surface is then contacted with a second developer solution containing the activator; a metal pattern is deposited by electroless metal plating; and the photoresist is removed.
    Type: Grant
    Filed: October 15, 1976
    Date of Patent: August 15, 1978
    Assignee: RCA Corporation
    Inventors: Edward Anthony James, Philip Kuznetzoff
  • Liquid crystalline 4"-cyano- or 4"-nitrobenzylidene-4'-(N,N-dialkylamino)-1-aminoazabenzene dyes
    Patent number: 4105654
    Abstract: Compounds of the formula ##STR1## wherein Y and Z are different and one is nitro or cyano and the other is --N(R).sub.2 wherein R is alkyl or alkylene, preferably of 1 to 4 carbon atoms, and X can be hydrogen, methyl, fluoro or chloro, are dyes having liquid crystal properties.
    Type: Grant
    Filed: November 12, 1976
    Date of Patent: August 8, 1978
    Assignee: RCA Corporation
    Inventors: Allen Bloom, Ling K. Hung
  • Electro-optic devices
    Patent number: 4105298
    Abstract: Improved perpendicular alignment can be imparted to nematic liquid crystal cells by coating the cell walls with a perfluorinated polymer applied to the cell walls by glow discharge in the presence of a perfluorinated monomer. The coated cell walls are thermally stable at least up to about 525.degree. C.
    Type: Grant
    Filed: April 11, 1977
    Date of Patent: August 8, 1978
    Assignee: RCA Corporation
    Inventors: Aaron W. Levine, Grzegorz Kaganowicz, Pabitra Datta
  • Overcoat structure for optical video disc
    Patent number: 4101907
    Abstract: An optical recording medium comprises a light reflecting material coated with a light absorbing material which is coated with a transparent barrier layer and overcoated with a relatively thick transparent protective layer. During recording, portions of the light absorbing layer are ablated by a modulated focussed light beam, thereby exposing portions of the reflecting layer while leaving the barrier and overcoat layers intact. Information is recorded in the form of a reflective-antireflective pattern. The overcoat layer suspends dust particles far above the focal plane of the recording lens, thereby reducing their effect on the recording or playback signal. The barrier layer insulates the light absorbing layer and the overcoat layer from chemical and thermal interactions which might result in a decreased signal-to-noise ratio.
    Type: Grant
    Filed: August 29, 1977
    Date of Patent: July 18, 1978
    Assignee: RCA Corporation
    Inventors: Alan Edward Bell, Robert Alfred Bartolini, Allen Bloom
  • Adherence of metal films to polymeric materials
    Patent number: 4101402
    Abstract: The addition of copper, either as a thin film or as an alloy constituent, to nickel-chromium alloys improves the adhesion of such alloys to polymeric substrates and coatings.
    Type: Grant
    Filed: April 23, 1976
    Date of Patent: July 18, 1978
    Assignee: RCA Corporation
    Inventors: John Louis Vossen, Jr., Frederick Russell Nyman, George Frederick Nichols
  • Process for forming an optical waveguide
    Patent number: 4100313
    Abstract: A technique for generating long narrow microstructures based upon the shadowing effect of thick slits placed between a source and a substrate. The method is particularly well suited for forming optical waveguides using a mask having a slit with a width larger than the width of the stripe to be deposited and being thick relative to the width of said slit.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: July 11, 1978
    Assignee: RCA Corporation
    Inventors: Jacob Meyer Hammer, Clyde Carl Neil
  • Apparatus improvements for growing single crystalline silicon sheets
    Patent number: 4099924
    Abstract: Mechanical components such as dies and crucibles, which come in contact with a silicon melt during the formation of single crystalline shaped silicon particles, e.g. thin sheets or ribbons, are coated with silicon oxynitride deposited by chemical vapor deposition techniques.
    Type: Grant
    Filed: March 16, 1977
    Date of Patent: July 11, 1978
    Assignee: RCA Corporation
    Inventors: Samuel Berkman, Michel Thomas Duffy, Kyong-Min Kim, Glenn Wherry Cullen
  • Method to provide homogeneous liquid crystal cells containing a dyestuff
    Patent number: 4098301
    Abstract: Filled liquid crystal cells containing a soluble, pleochroic dyestuff are treated by heating above the nematic to isotropic liquid transition temperature until the cells appear uniformly colored.
    Type: Grant
    Filed: December 23, 1976
    Date of Patent: July 4, 1978
    Assignee: RCA Corporation
    Inventors: Allen Bloom, Howard Sorkin
  • Method of transferring a surface relief pattern from a poly(1-methyl-1-cyclopropene sulfone) layer to a non-metallic inorganic layer
    Patent number: 4097618
    Abstract: This invention relates to a method of transferring a surface relief pattern to a non-metallic inorganic layer wherein a surface relief pattern is formed in a wet poly(1-methyl-1-cyclopropene sulfone) layer and is then sputter etched into the non-metallic inorganic layer from the wet layer.
    Type: Grant
    Filed: March 9, 1977
    Date of Patent: June 27, 1978
    Assignee: RCA Corporation
    Inventor: Eugene Samuel Poliniak
  • Metallized device
    Patent number: 4097636
    Abstract: A diamond body and an oxide substrate are simultaneously sputter-etched such that the diamond body is cleaned and a layer of the sputtered oxide is deposited on the clean surface of the diamond body, then a metallic layer is deposited on the oxide layer. This provides a metallized diamond body whose metallic layer will adhere to the body.
    Type: Grant
    Filed: June 18, 1975
    Date of Patent: June 27, 1978
    Assignee: RCA Corporation
    Inventors: Frank Zygmunt Hawrylo, Henry Kressel
  • Ultraviolet radiation detector
    Patent number: 4096387
    Abstract: A semiconductor body is used by the present invention in the detection of ultraviolet radiation. An antireflection layer is on a portion of a surface of said body with electrical contacting means on the remaining portion of the body. A phosphor layer is on the antireflection layer. The phosphor layer is capable of converting the ultraviolet radiation into visible or near infrared radiation which can be detected by the semiconductor body. On the phosphor layer is a metallic film which is substantially transmissive to ultraviolet radiation and substantially reflective to visible or near infrared radiation. The converted radiation in the phosphor layer which strikes the metallic flow may therefore be directed toward the semiconductor body for detection.
    Type: Grant
    Filed: December 9, 1976
    Date of Patent: June 20, 1978
    Assignee: RCA Corporation
    Inventor: Robert Harling Buckley