Patents Represented by Attorney Bruce S. Schneider

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  • Preparation of regioregular polyfluoroethylenes and products thereof
    Patent number: 4438247
    Abstract: Regioregular polyfluoroethylenes are produced by a specific set of reaction steps. A precursor polymer for the regioregular polyfluoroethylene is produced by using the monomer typically employed for producing the particular polyfluoroethylene and introducing a blocking group such as a chlorine atom. Polymerization of such fluoroethylenes with blocking groups to polyfluoroethylenes produces a corresponding regioregular precursor polymer. The blocking group is then replaced by a hydrogen with a reagent such as an alkyltin hydride. The resulting polymer is the desired polyfluoroethylene which has a regioregularity.
    Type: Grant
    Filed: February 19, 1982
    Date of Patent: March 20, 1984
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Rudolf E. Cais
  • Quality control procedure for determining particle concentration in polymers
    Patent number: 4433075
    Abstract: An expeditious method has been found for measuring the concentration of particles found in a polymer composition such as in wire and cable jackets. This procedure involves dissolving the polymer composition in a suitable solvent so that the particles form a dispersion in the solvent. The concentration of these particles in the solvent is then measured through transmission spectroscopy and this value is related to the concentration of the particles present in the original polymer body.
    Type: Grant
    Filed: November 12, 1982
    Date of Patent: February 21, 1984
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Paul C. Warren
  • Alignment of optical components
    Patent number: 4428644
    Abstract: A means for aligning components of an optical system without the use of conventional optical equipment is disclosed. This means includes the use of a pair of electrodes in proximity with the light guiding portion of a pyroelectric system element. The absorption of light in the waveguide produces a current in the pyroelectric material tht is monitored at the electrodes. Alignment of the system components is achieved by adjusting their relative position to increase the monitored signal.
    Type: Grant
    Filed: September 21, 1981
    Date of Patent: January 31, 1984
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Alastair M. Glass, Ivan P. Kaminow, Donald H. Olson
  • GaAs FETs Having long-term stability
    Patent number: 4426656
    Abstract: GaAs FETs exhibit excellent long-term stability if they have a drain ledge, a drain contact with reduced dendrite size, and a silicon nitride passivation layer. Accelerated aging tests at device case temperatures of 250 degrees C. indicate essentially no device failures after 200 hours of observation and a median failure time of approximately 500 hours.
    Type: Grant
    Filed: January 29, 1981
    Date of Patent: January 17, 1984
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: James V. DiLorenzo, James C. Hwang, William C. Niehaus, Wolfgang O. W. Schlosser, Stuart H. Wemple
  • Technique for the fabrication of an iron oxide mask
    Patent number: 4422898
    Abstract: Iron oxide films for "see-through" photomasks are deposited upon heated substrates by chemical vapor deposition from iron pentacarbonyl in the presence of oxygen. The solubility of the iron oxide film is found to be higher, the lower the temperature of the substrate during deposition. At temperatures below 160 degrees C., films are obtained which can be patterned at reasonable rates by photolithographic procedures using conventional mild etchants.
    Type: Grant
    Filed: June 2, 1982
    Date of Patent: December 27, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: John B. MacChesney, Paul B. O'Connor, Miles V. Sullivan
  • Optical information storage and retrieval
    Patent number: 4422159
    Abstract: A process employing bodies that are fabricated to have a specific configuration are useful for the storage of information such as digital data. In one embodiment a material, such as germanium, is etched to produce a structure having a multiplicity of columnar or conical features. By providing a sufficient number of these features per unit area, it is possible to store at a relatively high density a variety of information. This information storage is accomplished by melting the columns or cones in a localized area. If these structures are of the appropriate size and spacing, they appear optically absorbing before melting and a reflective region appears in the treated area. In this manner archival storage of densely packed information is possible.
    Type: Grant
    Filed: September 3, 1981
    Date of Patent: December 20, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Harold G. Craighead, Richard E. Howard
  • Devices based on surface tension changes
    Patent number: 4417786
    Abstract: An optical change in a device is produced through modification of the surface tension between two materials by the change of an electric field. For example, such a device is formed by introducing an electrolyte and a metal such as mercury into a capillary tube. The surface tension between the two fluids is changed through application of a voltage between them. When the surface tension is altered the relative positions of the fluids in the tube also change. Thus, it is possible to introduce one fluid into a portion of the tube which contained the other before the change in voltage, i.e., the position of the interface between the fluids, is moved. If the two fluids have different colors, the translation produces a color change if the area of the tube near the initial interface position is viewed.
    Type: Grant
    Filed: June 11, 1981
    Date of Patent: November 29, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Gerardo Beni, Susan Hackwood
  • Matrix addressable electrochromic devices
    Patent number: 4416516
    Abstract: Electrochromic devices utilizing an electrochromic iridium oxide electrode and a tantalum oxide counterelectrode exhibit a voltage threshold and short circuit memory. The short circuit memory and voltage threshold allow the use of these devices in matrix addressing schemes.
    Type: Grant
    Filed: April 14, 1981
    Date of Patent: November 22, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Gerardo Beni, Lawrence M. Schiavone
  • Photosensitive element containing a polymer of an indenone based compound and a methacrylate compound
    Patent number: 4409318
    Abstract: The use of polymers including an indanone entity for use as a resist in a photosensitive body used in a lithographic process leads to desirable results. These resists have excellent resolution essentially equivalent to that obtainable with poly(methyl methacrylate). Additionally, the sensitivities of these polymers to the actinic radiation typically used in photolithographic processes, e.g., radiation from a mercury lamp, is significantly better than that obtained with poly(methyl methacrylate).
    Type: Grant
    Filed: August 19, 1982
    Date of Patent: October 11, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Edwin A. Chandross, Ray L. Hartless
  • Method for etching III-V semiconductors and devices made by this method
    Patent number: 4403241
    Abstract: The use of an anisotropic etchant containing BCl.sub.3 and a source of atomic chlorine for III-V semiconductor materials has yielded improved results for semiconductor devices. For example, via gallium arsenide field effect transistors produced using this anisotropic etchant to fabricate via holes exhibit excellent electrical characteristics.
    Type: Grant
    Filed: August 22, 1980
    Date of Patent: September 6, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Alexander D. Butherus, Lucian A. D'Asaro
  • Process of making semiconductor devices using photosensitive bodies
    Patent number: 4400461
    Abstract: Photosensitive bodies that are sensitive to ultraviolet radiation and that exhibit excellent contrast are formed from base soluble polymers such as poly(methyl methacrylate-co-methacrylic acid) physically mixed with base insoluble materials such as o-nitrobenzyl esters. The base insoluble esters decompose upon irradiation to form base soluble entities in the irradiated regions. These irradiated portions are then soluble in basic solutions that are used to develop the desired image.
    Type: Grant
    Filed: May 22, 1981
    Date of Patent: August 23, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Edwin A. Chandross, Elsa Reichmanis, Cletus W. Wilkins, Jr.
  • Crystallographic etching of III-V semiconductor materials
    Patent number: 4397711
    Abstract: Crystallographic etching in III-V semiconductor materials such as GaAs is achieved, for example, by utilizing a suitable halogen containing entity such as chlorine, bromine and iodine. This crystallographic etching yields in one embodiment essentially vertical surfaces of optical quality. Therefore, the procedure is useful in fabricating integrated circuits and in producing optical devices.
    Type: Grant
    Filed: October 1, 1982
    Date of Patent: August 9, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Vincent M. Donnelly, Daniel L. Flamm, Dale E. Ibbotson
  • Copper corrosion inhibitor
    Patent number: 4395294
    Abstract: The treatment of copper with 5-methyl benzimidazole yields excellent protection from oxidation and/or corrosion of the treated copper body. Additionally, this treatment does not interfere with subsequent soldering of the copper.
    Type: Grant
    Filed: August 17, 1981
    Date of Patent: July 26, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Norris D. Hobbins, Ronald F. Roberts
  • Spectroscopic monitoring of gas-solid processes
    Patent number: 4394237
    Abstract: A method for accurately monitoring and adjusting gas phase processes such as gas etching and chemical vapor deposition has been found. This method relies on the use of induced fluorescence. The gaseous phase used in the process to be monitored is probed by excitation with a suitable energy source. The emission from the gas phase induced through this excitation is then monitored and yields an accurate measure of concentration of the active species present. In turn the conditions of the fabrication process are adjusted based on these discerned concentrations.
    Type: Grant
    Filed: July 17, 1981
    Date of Patent: July 19, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Vincent M. Donnelly, Daniel L. Flamm, Robert F. Karlicek, Jr.
  • Fabrication of conductor-clad composites using molding compounds and techniques
    Patent number: 4393111
    Abstract: Conductor-clad composites are advantageously fabricated using molding compounds and associated processing techniques. The conductive cladding is applied and bonded to the composite during the molding process. The conductor-clad composite may be used as printed wiring board, and in this embodiment results in improved physical, chemical, mechanical, and electrical properties.
    Type: Grant
    Filed: July 31, 1981
    Date of Patent: July 12, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Theodore H. Klein
  • Photoelectrochemical cells
    Patent number: 4388382
    Abstract: Photovoltaic devices are fabricated by forming a thin passivating layer, for example, an oxide layer on a semiconductor material. The passivating layer on the semiconductor material is then contacted with an electrolyte such as an electrolyte containing vanadium ions. The resulting electrolyte/passivating layer/semiconductor (EPLS) structure exhibits excellent solar conversion efficiencies and good stability.
    Type: Grant
    Filed: February 13, 1981
    Date of Patent: June 14, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Klaus J. Bachmann, Hans-Joachim Lewerenz, Maria T. A. S. Menezes
  • Removal of germanium from the effluent of processes for the production of optical components
    Patent number: 4385915
    Abstract: Recovery of germanium from the effluent of optical fiber manufacturing processes depends on the realization that the germanium is to a substantial extent in gaseous form. Thus, to separate the germanium effectively appropriate measures are taken to separate not only particulate matter but also gaseous germanium compounds. This separation is done through among other steps an appropriate solvation and precipitation to remove the gaseous germanium material.
    Type: Grant
    Filed: March 1, 1982
    Date of Patent: May 31, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Jeffrey A. Amelse, Michael P. Bohrer, Darwin L. Wood
  • Photosensitive element containing UV sensitive terpolymers
    Patent number: 4382120
    Abstract: A photolithographic resist with excellent sensitivity for actinic radiation in the short wavelength ultraviolet region is produced from terpolymers of (1) methyl methacrylate, (2) materials such as 3-oximino-2-butanone methacrylate, and (3) compounds such as methacrylonitrile.
    Type: Grant
    Filed: February 10, 1982
    Date of Patent: May 3, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Elsa Reichmanis, Cletus W. Wilkins, Jr.
  • Method of forming dielectrically isolated silicon semiconductor materials utilizing porous silicon formation
    Patent number: 4380865
    Abstract: Dielectrically isolated areas of single crystalline silicon suitable for use in device applications have been produced utilizing a particular processing sequence. This sequence first involves producing an area of porous silicon on a silicon substrate. A single crystal region of silicon is then formed on the porous silicon through procedures such as molecular beam epitaxy, chemical vapor deposition or laser fusion. The region of the porous silicon under the single crystal silicon is then oxidized in a specifically controlled manner to form an insulator.
    Type: Grant
    Filed: November 13, 1981
    Date of Patent: April 26, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Robert C. Frye, Harry J. Leamy
  • Purification process for compounds useful in optical fiber manufacture
    Patent number: 4372834
    Abstract: Silicon tetrachloride is processed to ultrahigh purity by subjecting it to a specific succession of purification steps. These steps include the photochlorination of the SiCl.sub.4 using a reactor that allows a long residence time for the SiCl.sub.4. After photochlorination, highly volatile products such as HCl are removed and the remaining impurities are then separated by a distillation technique.
    Type: Grant
    Filed: June 19, 1981
    Date of Patent: February 8, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Robert L. Barns, Edwin A. Chandross, Daniel L. Flamm, Louis T. Manzione, Larry F. Thompson