Patents Represented by Attorney Bruce S. Schneider
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Patent number: 6368753Abstract: A method for repairing scalpel masks is described. In particular, opaque defects are repaired by milling with a gallium beam at a sufficient energy to ensure appropriate implantation of gallium into the membrane underlying the blocking material. Transparent defects are repaired using a gallium beam that impacts styrene gas in the vicinity of the defect to be repaired.Type: GrantFiled: August 27, 1999Date of Patent: April 9, 2002Assignee: Agere Systems Guardian Corp.Inventors: Lloyd Richard Harriott, Anthony Edward Novembre
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Patent number: 6260386Abstract: Glass preforms are cleaned by contacting each preform (11) with supercritical carbon dioxide which dissolves residual index-matching oil on the preform. The liquefied carbon dioxide is then converted to gaseous carbon dioxide which conveniently separates the index-matching oil so that it can be recovered and reused. The gaseous carbon dioxide is likewise recycled for use in cleaning other preforms, and so there is substantially no waste.Type: GrantFiled: March 10, 1994Date of Patent: July 17, 2001Assignee: Lucent Technologies Inc.Inventors: Jeffrey Jonathan Evans, Siu-Ping Hong, Urmi Ray, Trudy Murrell Thiele
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Patent number: 6159665Abstract: Photoacid generators advantageous for use in applications such as photoacid generators used in chemically amplified resists are disclosed. These compounds are based on an ortho nitro benzyl configuration employing an .alpha. substituent having high bulk, steric characteristics, and electron withdrawing ability. The enhanced efficacy is particularly found in compounds both having a suitable .alpha. substituent and a second ortho substituent with large electron withdrawing and steric effects.Type: GrantFiled: June 17, 1993Date of Patent: December 12, 2000Assignee: Lucent Technologies Inc.Inventors: Evelyn Chin, Francis Michael Houlihan, Omkaram Nalamasu
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Patent number: 6111133Abstract: Substituted styrenes are synthesized by a simple, low temperature technique. A protected phenol styrene is reacted with an acid anhydride, dicarbonate, a halogen substituted alkyl, or an acid chloride in the presence of base to form a carbonyl substituted styrene. Unexpected yield decrease due to distillation is avoided because the product is sufficiently pure to be used without such distillation.Type: GrantFiled: September 23, 1992Date of Patent: August 29, 2000Assignee: Lucent Technologies Inc.Inventor: Francis Michael Houlihan
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Patent number: 5982095Abstract: Improved plasma displays utilize electrodes including low electron affinity (LEA) materials such as diamond. In dc displays the LEA materials are disposed on the cathode. In ac displays the LEA materials are disposed on the dielectric layers of both electrodes. The improved displays exhibit reduced operating voltage, higher resolution, and enhanced robustness.Type: GrantFiled: September 19, 1995Date of Patent: November 9, 1999Assignee: Lucent Technologies Inc.Inventors: Sungho Jin, Gregory Peter Kochanski, Wei Zhu
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Patent number: 5943554Abstract: A distributed feedback (DFB) laser is made with a spatially graded optical coupling (.kappa.) between its diffraction grating and its active layer by means of selective area epitaxial growth of the epitaxial layer from which the grating is formed. More specifically, the epitaxial layer is formed on a major surface of a semiconductor substrate on which a mask, such as a silicon dioxide mask, has been formed. The mask has a pair of segments spaced apart by a fixed distance, the segments having spatially variable widths. Advantageously the epitaxial layer has a refractive index that is different from that of the substrate at the operating wavelength of the laser. The epitaxial layer is then etched into stripes. In this way the heights of the resulting grating stripes will be spatially variable, and so will the coupling .kappa. between the grating and the active layer. In this way, the properties of the optical output of the laswer can be adjusted.Type: GrantFiled: July 22, 1997Date of Patent: August 24, 1999Assignee: Lucent Technologies Inc.Inventors: William Crossley Dautremont-Smith, Todd Robert Hayes
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Patent number: 5766688Abstract: Metal hydrides are activated by an electrochemical procedure. In this procedure, a bulk sample of the corresponding metal is immersed in an aqueous electrolyte and contacted by a cathode. Current passed through the aqueous electrolyte causes electrolysis of the water and a concomitant reaction with the formation of metal hydride. As a result, the metal hydride is fractured and smaller particles result. Additionally, the resulting metal hydride has a substantial amount of absorbed hydrogen. A novel plating method, taking advantage of the reducing power of hydrogen absorbed in a metal hydride, is useful to encapsulate such metal hydride with a variety of metals. Therefore, such hydrides are uniformly coated by using plating solutions without the standard reducing agent and stabilizer.Type: GrantFiled: July 18, 1997Date of Patent: June 16, 1998Assignee: Lucent Technologies Inc.Inventors: Henry Hon Law, Brijesh Vyas
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Patent number: 5754794Abstract: A method and apparatus for encoding and decoding multi-dimensional signals is disclosed. Non-separable multi-dimensional filters are utilized. Analysis filters encode the signal by applying a windowing function and a reduction function to the multi-dimensional signal. This produces a prototype. The prototype is then replicated as many times as required by utilizing a modulation function. Synthesis filters then decode the encoded signal by utilizing the inverse of the encoding process.Type: GrantFiled: October 19, 1995Date of Patent: May 19, 1998Assignee: Lucent Technologies Inc.Inventors: Riccardo Bernardini, Jelena Kovacevic
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Patent number: 5750312Abstract: It has been found that surface reactions with basic materials such as amines found in the processing environment during lithographic processing contribute to a loss of linewidth control for resists such as chemically amplified resists. This loss in linewidth results from the reaction of the acid generated by exposing radiation with, for example, the amine resulting in a lack of chemical reaction where such reaction is desired. The problem is solved in one embodiment by employing an acid containing barrier layer on the resist.Type: GrantFiled: May 2, 1994Date of Patent: May 12, 1998Assignee: Lucent Technologies Inc.Inventors: Edwin Arthur Chandross, Omkaram Nalamasu, Elsa Reichmanis, Gary Newton Taylor, Larry Flack Thompson
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Patent number: 5741629Abstract: Polymers suitable for chemically amplified resists based on styrene chemistry are advantageously formed with a meta substituent on the phenyl ring of the styrene moiety. Additionally, polymers for such applications including, but not limited to, meta substituted polymers are advantageously formed by reacting a first monomer having a first protective group with a second monomer having a second protective group. After polymerization, the second protective group is removed without substantially affecting the first protective group. For example, if the first protective group is an alkoxy carbonyl group, and the second protective group is a silyl ether group, treatment with a lower alcohol with trace amounts of acid transforms the silyl group into an OH-moiety without affecting the alkoxy carbonyl group.Type: GrantFiled: October 15, 1996Date of Patent: April 21, 1998Assignee: Lucent Technologies Inc.Inventors: Edwin Arthur Chandross, Janet Mihoko Kometani, Omkaram Nalamasu, Elsa Reichmanis, Kathryn Elizabeth Uhrich
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Patent number: 5717292Abstract: Improved plasma displays utilize permanent magnet components for low-voltage operation. Permanent magnet components providing magnetic fields transverse to the direction of electron movement increase the electron pathlength, thereby enhancing the ionization efficiency of the electrons. This permits lower voltage operation, higher-pixel density and greater durability. In exemplary embodiments, magnetic components can be placed below the cathode, disposed between the electrodes, or incorporated in the cathode.Type: GrantFiled: November 30, 1995Date of Patent: February 10, 1998Assignee: Lucent Technologies Inc.Inventors: Sungho Jin, Gregory Peter Kochanski, Wei Zhu
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Patent number: 5698497Abstract: Carbonaceous materials based on the fullerene molecules have been developed which allow for superconductivity. The fullerene materials are soluble in common solvents.Type: GrantFiled: June 13, 1994Date of Patent: December 16, 1997Assignee: Lucent Technologies Inc.Inventors: Robert Cort Haddon, Arthur Foster Hebard, Donald Winslow Murphy, Matthew Jonathan Rosseinsky
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Patent number: 5681196Abstract: In accordance with the invention, a field emission device is made by disposing emitter material on an insulating substrate, applying a sacrificial film to the emitter material and forming over the sacrificial layer a conductive gate layer having a random distribution of apertures therein. In the preferred process, the gate is formed by applying masking particles to the sacrificial film, applying a conductive film over the masking particles and the sacrificial film and then removing the masking particles to reveal a random distribution of apertures. The sacrificial film is then removed. The apertures then extend to the emitter material. In a preferred embodiment, the sacrificial film contains dielectric spacer particles which remain after the film is removed to separate the emitter from the gate. The result is a novel and economical field emission device having numerous randomly distributed emission apertures which can be used to make low cost flat panel displays.Type: GrantFiled: November 17, 1995Date of Patent: October 28, 1997Assignee: Lucent Technologies Inc.Inventors: Sungho Jin, Gregory Peter Kochanski, John Thomson, Jr.
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Patent number: 5660600Abstract: Batteries based on lead chemistry, e.g., lead-acid batteries, are substantially improved through the use of a particular positive material. This material is formed by the electrochemical conversion of tetrabasic lead sulfate (TTB) where this TTB is synthesized at a pH in the range 9.3 to 12 and under reaction conditions that provide a substantial excess of sulfate to the reactive lead. The resulting materials provide needle-like structures with a width generally in the range 3 to 1 .mu.m. The relative narrow needles, when employed on the positive electrode of a lead acid battery, improve the efficiency of formation, provide good adhesive to the positive plate, extend battery life, as well as, yield excellent capacity per gram of active material.Type: GrantFiled: March 24, 1995Date of Patent: August 26, 1997Assignee: Lucent Technologies Inc.Inventor: Brijesh Vyas
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Patent number: 5649039Abstract: An optical fiber ferrule assembly is disclosed which comprises an inner sleeve (of a metallic material, for example) including a necked-down portion for securing the fiber, and an outer housing (of a plastic material, for example) formed as a cylindrical member through which the sleeve may be inserted. A washer may be attached to a flanged end portion of the sleeve and subsequently laser welded to an associated optical submount.Type: GrantFiled: August 6, 1992Date of Patent: July 15, 1997Assignee: Lucent Technologies Inc.Inventors: Albert Michael Benzoni, Yang Choong Chen, Mindaugas Fernand Dautartas
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Patent number: 5643838Abstract: The use of a deposition process involving a plasma struck in a gas including tetraethoxysilane and a source of oxygen yields, at low temperatures, conformal coatings of silicon dioxide. This process has significant implications for semiconductor device fabrication involving the deposition of a dielectric over a metallic non-planar structure.Type: GrantFiled: September 3, 1993Date of Patent: July 1, 1997Assignee: Lucent Technologies Inc.Inventors: Robert Earl Dean, Pang-Dow Foo, Earl Ryan Lory, Leonard Jay Olmer
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Patent number: 5630933Abstract: Metal hydrides are activated by an electrochemical procedure. In this procedure, a bulk sample of the corresponding metal is immersed in an aqueous electrolyte and contacted by a cathode. Current passed through the aqueous electrolyte causes electrolysis of the water and a concomitant reaction with the formation of metal hydride. As a result, the metal hydride is fractured and smaller particles result. Additionally, the resulting metal hydride has a substantial amount of absorbed hydrogen. A novel plating method, taking advantage of the reducing power of hydrogen absorbed in a metal hydride, is useful to encapsulate such metal hydride with a variety of metals. Therefore, such hydrides are uniformly coated by using plating solutions without the standard reducing agent and stabilizer.Type: GrantFiled: July 14, 1995Date of Patent: May 20, 1997Assignee: Lucent Technologies Inc.Inventors: Henry H. Law, Brijesh Vyas
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Patent number: 5620558Abstract: The linewidth in patterns produced by etching copper layers is more easily maintained using a specific etching medium. In particular, this medium includes aqueous hydrofluoric acid, copper chloride, and an additional chloride salt. The etching medium is also particularly useful for bilayer metal constructions such as the copper/titanium structure found in many multichip modules.Type: GrantFiled: March 28, 1994Date of Patent: April 15, 1997Assignee: Lucent Technologies Inc.Inventors: Karrie J. Hanson, Barry Miller, Barbara J. Sapjeta, Akshay V. Shah, Ken M. Takahashi
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Patent number: 5616518Abstract: Integrated circuits employing titanium nitride are significantly improved by using a specific method for formation of the titanium nitride in the device fabrication. In particular, a plasma such as one formed in an electron cyclotron resonance apparatus is employed to dissociate a source of nitrogen and a source of hydrogen and the dissociation products are combined at the integrated circuit deposition substrate with titanium tetrachloride. The resulting deposition is essentially devoid of chlorine and has advantageous step-coverage properties.Type: GrantFiled: November 3, 1994Date of Patent: April 1, 1997Assignee: Lucent Technologies Inc.Inventors: Pang-Dow Foo, Chien-Shing Pai
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Patent number: RE36964Abstract: Fabrication of devices of micron and submicron minimum feature size is accomplished by lithographic processing involving a back focal plane filter. A particularly important fabrication approach depends upon mask patterns which produce images based on discrimination as between scattered and unscattered radiation by accelerated electrons.Type: GrantFiled: April 29, 1994Date of Patent: November 21, 2000Assignee: Lucent Technologies Inc.Inventors: Steven David Berger, John Murray Gibson