Patents by Inventor John Thomson, Jr.
John Thomson, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6716488Abstract: A ferrite layer formation process that may be performed at a lower temperature than conventional ferrite formation processes. The formation process may produce highly anisotropic structures. A ferrite layer is deposited on a substrate while the substrate is exposed to a magnetic field. An intermediate layer may be positioned between the substrate and the ferrite to promote bonding of the ferrite to the substrate. The process may be performed at temperatures less than 300° C. Ferrite film anisotropy may be achieved by embodiments of the invention in the range of about 1000 dyn-cm/cm3 to about 2×106 dyn-cm/cm3.Type: GrantFiled: June 22, 2001Date of Patent: April 6, 2004Assignee: Agere Systems Inc.Inventors: Debra Anne Fleming, Gideon S. Grader, David Wilfred Johnson, Jr., John Thomson, Jr., Robert Bruce Van Dover
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Patent number: 6538614Abstract: An antenna structure including at least one planar antenna element. In place of a balun, the antenna structure further includes a slotline for coupling the planar antenna element with an unbalanced load.Type: GrantFiled: April 17, 2001Date of Patent: March 25, 2003Assignee: Lucent Technologies Inc.Inventors: Debra A. Fleming, George Earl Peterson, John Thomson, Jr.
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Patent number: 6153078Abstract: The invention provides an improved process for fabricating devices containing metallized magnetic ceramic material, such as inductors, transformers, and magnetic substrates. In particular, the unique vias utilized in the process of the invention allow fabrication of devices from multiple unfired ferrite layers with only a single via-coating step, thereby avoiding the need numerous punching steps. Moreover, there is no need for expanding the dimensions of the vias and thus no need for internal metallization. The invention therefore provides for green tape-type fabrication of devices such as inductors, transformers, and magnetic substrates in a manner faster, less complex, and more reliable than current methods. The invention also relates to use of an improved conductive material in such a process, the conductive material containing silver/palladium particles, ferrite particles, a cellulose-based or other organic binder, and a solvent.Type: GrantFiled: August 5, 1999Date of Patent: November 28, 2000Assignee: Lucent Technologies Inc.Inventors: Debra Anne Fleming, Gideon S. Grader, David Wilfred Johnson, Jr., Vincent George Lambrecht, Jr., John Thomson, Jr.
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Patent number: 6007758Abstract: The invention provides an improved process for fabricating devices containing metallized magnetic ceramic material, such as inductors, transformers, and magnetic substrates. In particular, the unique vias utilized in the process of the invention allow fabrication of devices from multiple unfired ferrite layers with only a single via-coating step, thereby avoiding the need numerous punching steps. Moreover, there is no need for expanding the dimensions of the vias and thus no need for internal metallization. The invention therefore provides for green tape-type fabrication of devices such as inductors, transformers, and magnetic substrates in a manner faster, less complex, and more reliable than current methods. The invention also relates to use of an improved conductive material in such a process, the conductive material containing silver/palladium particles, ferrite particles, a cellulose-based or other organic binder, and a solvent.Type: GrantFiled: February 10, 1998Date of Patent: December 28, 1999Assignee: Lucent Technologies Inc.Inventors: Debra Anne Fleming, Gideon S. Grader, David Wilfred Johnson, Jr., Vincent George Lambrecht, Jr., John Thomson, Jr.
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Patent number: 5914437Abstract: Cracking in thin sheets of sol-gel-produced material is avoided by use of a support liquid during gelation and drying. Silica glass, as well as other glass and ceramic bodies, is contemplated.Type: GrantFiled: June 23, 1997Date of Patent: June 22, 1999Assignee: Lucent Technologies IncorporatedInventors: Edwin Arthur Chandross, David Wilfred Johnson, Jr., John Burnette MacChesney, Eliezer M. Rabinovich, John Thomson, Jr.
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Patent number: 5877666Abstract: An inductor (100) optimized for surface-mount vacuum-pickup automated circuit assembly eliminates the expense of an inductor housing. The inductor has a hollow rectangular ferrite core (101) and a winding defined by a stripline (102) deposited on the core surface. Winding ends are formed by conductive vias (103) in the core that open onto the core surface, where they connect and mount the inductor to a circuit board (150). A flat sheet (104) adhered to one face of the core provides a surface for vacuum pickup and for labeling of the inductor. The core of a passively tuneable inductor (200) defines multiple unconnected winding segments (102-103). Segment ends mount the inductor to the circuit board and connect the segments to circuit board striplines (254) that are laid out in a pattern to interconnect a number of the segments into a winding. The inductor is tuned by changing the stripline layout and thereby varying the number of interconnected segments.Type: GrantFiled: March 12, 1997Date of Patent: March 2, 1999Assignee: Lucent Technologies Inc.Inventors: David Wilfred Johnson, Jr., David A. Norte, John Thomson, Jr.
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Patent number: 5861790Abstract: A transformer (FIG. 1) optimized for surface-mount vacuum-pickup automated circuit assembly eliminates the expense of a transformer housing. The transformer has a ferrite body (100) that defines a pair of wells (208, 209) each opening onto an opposite face (108, 109) of the ferrite body. Transformer primary and secondary windings are wound in a coil (103) through slots (210, 211) around a transformer core (204) at the bottom of the wells. The windings do not protrude from the wells beyond the faces, resulting in flat faces. A first plurality of conductive vias (104-106), one pair for each winding, are completely embedded in the ferrite body and extend to both of the faces. Each pair of vias serves at one face to attach to the winding and at the other face to attach to solder pods of a PC board. The embedded vias also serve as EMI filters. A plate (107) covers the one face and provides a surface for vacuum pickup and for labeling of the transformer. The ferrite body (500) of a first transformer (FIG.Type: GrantFiled: March 12, 1997Date of Patent: January 19, 1999Assignee: Lucent Technologies Inc.Inventors: David Wilfred Johnson, Jr., David A. Norte, John Thomson, Jr.
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Patent number: 5802702Abstract: The method of making a metallized magnetic substrate for devices including a magnetic component involves providing an unfired ceramic body. In one exemplary embodiment, the method further involves making one or more vias through the ceramic body, coating the via side walls with conductive material, forming an aperture through the ceramic body, such that an aperture edge intersects the via, and metallizing the unfired ceramic body such that a conductive pathway is formed that includes the conductive material in the via. Finally, the metallized unfired ceramic body is fired in conventional fashion, optionally followed by deposition of additional conductor material.Type: GrantFiled: September 4, 1997Date of Patent: September 8, 1998Assignee: Lucent Technologies Inc.Inventors: Debra Anne Fleming, David Wilfred Johnson, Jr., Vincent George Lambrecht, Jr., Henry Hon Law, David Joseph Liptack, Apurba Roy, John Thomson, Jr.
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Patent number: 5725938Abstract: The present invention provides improved techniques for metallizing ceramic substrates. The method comprises providing a ceramic substrate and depositing a layer of reducible material on the ceramic substrate. The layer of reducible material includes a reducible ceramic such as copper oxide. The ceramic substrate having the layer of reducible material disposed thereon is heated and the reducible material is contacted with a reducing agent to create a conductive region. The conductive region is either a metallized region formed by reduction, or it is a conductive ceramic formed through surface reduction. The present invention further provides a metallized ceramic substrate. The metallized layer comprises ceramic regions having at least one constituent in common with the ceramic substrate. The ceramic substrate and the ceramic regions of the metallized layer are sintered to each other such that the metallized region is interspersed between the sintered ceramic regions.Type: GrantFiled: August 29, 1996Date of Patent: March 10, 1998Assignee: Lucent Technologies Inc.Inventors: Sungho Jin, David Wilfred Johnson, Jr., Henry Hon Law, John Thomson, Jr., Thomas Henry Tiefel
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Patent number: 5704820Abstract: The pillar structure according to the invention has a substantially longer surface path length from negative to positive electrodes resist breakdown in a high voltage environment. The processing and assembly methods in this invention permit low-cost manufacturing of high breakdown-voltage, dielectric pillars for the flat panel display.Type: GrantFiled: January 31, 1995Date of Patent: January 6, 1998Assignee: Lucent Technologies Inc.Inventors: Edwin Arthur Chandross, Sungho Jin, Gregory Peter Kochanski, John Thomson, Jr., Wei Zhu
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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: 5619791Abstract: The thickness uniformity of a plated metal layer inside a via hole can be enhanced by intersecting a conductive via with an insulating aperture before plating. The new via configuration improves the mass transfer of the plating. It is believed that the apertures lower the local solution ohmic resistance near the via holes. The method can be applied to the manufacture of a wide variety of circuit boards.Type: GrantFiled: April 28, 1995Date of Patent: April 15, 1997Assignee: Lucent Technologies Inc.Inventors: Vincent G. Lambrecht, Jr., Henry H. Law, Apurba Roy, John Thomson, Jr., Te-Sung Wu
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Patent number: 5504385Abstract: 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: August 31, 1994Date of Patent: April 2, 1996Assignee: AT&T Corp.Inventors: Sungho Jin, Gregory P. Kochanski, John Thomson, Jr.
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Patent number: 5498925Abstract: The disclosed multi-pixel flat panel displays (e.g., flat panel field emission displays (FPFED) or liquid crystal displays (LCD)) includes spaced apart first and second electrodes, with a patterned solid material layer in contact with one of the electrodes, exemplarily between the two electrodes. The patterned layer (referred to as the "web") includes a multiplicity of apertures, with at least one (preferably three or more) aperture associated with a given pixel. In the aperture is disposed a quantity of a second material, exemplarily, a phosphor in the case of an FPFED, or a color filter material in the case of a LCD. The web can facilitate second material deposition by means of, e.g., screen printing, typically making possible formation of smaller phosphor or filter dots than was possible by prior art device. The web also can facilitate provision of spacer structure between the two electrodes, and can include getter or hygroscopic material.Type: GrantFiled: May 19, 1995Date of Patent: March 12, 1996Assignee: AT&T Corp.Inventors: Randall F. Bell, Gregory P. Kochanski, John Thomson, Jr.
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Patent number: 5479695Abstract: Magnetic components are fabricated as monolithic structures using multilayer co-fired ceramic tape techniques. Fabrication of these magnetic components involves constructing multiple layers of a magnetic material and an insulating non-magnetic material to form a monolithic structure with well defined magnetic and insulating non-magnetic regions. Windings are formed using screen printed conductors connected through the multilayer structure by conducting vias.Type: GrantFiled: July 1, 1994Date of Patent: January 2, 1996Assignee: AT&T Corp.Inventors: Gideon S. Grader, David W. Johnson, Jr., Apurba Roy, John Thomson, Jr.
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Patent number: 5349743Abstract: Magnetic components are fabricated as monolithic structures using multilayer co-fired ceramic tape techniques. Fabrication of these magnetic components involves constructing multiple layers of a magnetic material and an insulating non-magnetic mataerial to form a monolithic structure with well defined magnetic and insulating non-magnetic regions. Windings are formed using screen printed conductors connected through the multilayer structure by conducting vias.Type: GrantFiled: May 2, 1991Date of Patent: September 27, 1994Assignee: AT&T Bell LaboratoriesInventors: Gideon S. Grader, David W. Johnson, Jr., Apurba Roy, John Thomson, Jr.
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Patent number: 5239744Abstract: Multilayer magnetic components can be made with reduced cracking and magnetic degradation by forming layers having patterns of magnetic and insulating regions separated by regions that are removable during sintering. Advantageously, when the layers are stacked, layers of removable material are also disposed between magnetic regions and insulating regions so as to produce upon sintering a magnetic core within an insulating body wherein the core is substantially completely surrounded by a thin layer of free space.Type: GrantFiled: January 9, 1992Date of Patent: August 31, 1993Assignee: AT&T Bell LaboratoriesInventors: Debra A. Fleming, David W. Johnson, Jr., Warren W. Rhodes, Apurba Roy, John Thomson, Jr.
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Patent number: 5133129Abstract: This invention concerns with microwave devices including resonant elements made from dielectric materials represented by the nominal formulas Ba.sub.2 Ti.sub.9 O.sub.20, BaTi.sub.4 O.sub.9, ZrTiO.sub.4 (Sn) and the like. The resonant element is produced conventionally by a process including numerous steps of mixing, drying, screening, calcining, ball milling, drying, screening or remilling and spray drying, forming and sintering. These steps may take 72 hours or more, prior to the forming step, and are labor and energy consuming. The improvement resides in the use of a reduced number of steps which include mixing precursor powders with addition of water and dispersants, spray drying or flocculating and drying the mixed formulation, forming and reactively sintering, so as to reduce the total processing time, prior to the forming step, to form about 8 to 24 hours.Type: GrantFiled: July 16, 1990Date of Patent: July 28, 1992Assignee: AT&T Bell LaboratoriesInventor: John Thomson, Jr.
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Patent number: 5043794Abstract: In accordance with the present invention, an integrated circuit package comprises a thermally conductive plate for receiving an integrated circuit and an open rectangular structure of conductor and insulator for surrounding the sides of the circuit and presenting one or more linear arrays of conductive connectors extending laterally through the rectangular structure. Preferably the rectangular structure also includes transverse contacts. Advantageously the plate includes extensions beyond the rectangular structure for acting as cooling fins on opposing sides of the rectangular structure. The linear arrays and cooling fins are preferably on different pairs of parallel sides.Type: GrantFiled: September 24, 1990Date of Patent: August 27, 1991Assignee: AT&T Bell LaboratoriesInventors: King L. Tai, John Thomson, Jr.
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Patent number: 5006504Abstract: A process for the preparation of superconducting ceramic materials by a solid state reaction technique. The process is especially suited for production of powders including .gtoreq.95% of Ba.sub.2 YCu.sub.3 O.sub.7 for use in producing sintered ceramic bodies including >99% Ba.sub.2 YCu.sub.3 O.sub.7.Type: GrantFiled: August 28, 1989Date of Patent: April 9, 1991Assignee: AT&T Bell LaboratoriesInventors: Henry M. O'Bryan, Jr., Warren W. Rhodes, John Thomson, Jr.