Patents Examined by Donald Griffin
  • Patent number: 5184277
    Abstract: A ceramic capacitor having excellent electric characteristics includes internal electrodes comprising a base metal such as Ni, and a method for fabricating the capacitor includes the step of firing under a non-oxidation atmosphere. A dielectric layer of the ceramic capacitor comprises a basic and additional components. The basic components comprises a material represented by the following formula:(1-.alpha.) {(Ba.sub.k-x-z M.sub.x L.sub.z)O.sub.k (Ti.sub.1-y R.sub.y)O.sub.2-y/2 }+.alpha.BaZrO.sub.3where, M is Mg and/or Zn, L is Ca and/or Sr, R is a rare earth element, and .alpha., k, x, z and y are nuermals fulfilling the conditions of 0.005.ltoreq..alpha..ltoreq.0.04, 1.00.ltoreq.k.ltoreq.k.ltoreq.1.05, 0<x<0.10, 0<z.ltoreq.0.05, 0.01.ltoreq.x+z.ltoreq.0.10, and 0<y.ltoreq.0.04. The additional component comprises Li.sub.2 O (or B.sub.2 O.sub.3), SiO.sub.2 and MO (MO is at least one metal oxide selected from the group consisting of BaO, SrO, CaO, MgO and ZnO).
    Type: Grant
    Filed: October 17, 1991
    Date of Patent: February 2, 1993
    Assignee: Taiyo Yuden Kabusikigaisha
    Inventors: Hisamitsu Shizuno, Hirosi Kisi, Hirosi Saito, Makoto Fujii
  • Patent number: 5181157
    Abstract: A ceramic capacitor having excellent electric characteristics which includes internal electrodes essentially comprising a base metal such as Ni, and a method for fabricating the capacitor includes the step of firing under a non-oxidation atmosphere. A dielectric layer of the ceramic capacitor comprises basic and additional components. The basic component comprises a material represented by the following formula:(Ba.sub.k-(x+y) M.sub.x L.sub.y)O.sub.k (Ti.sub.1-z R.sub.z)O.sub.2-l z/2where, M is Mg and/or Zn, L is Ca and/or Sr, R is a rare earth element, and k, x, z and y are numerals fulfilling the conditions of 1.00.ltoreq.k.ltoreq.1.05, 0<x<0.10, 0<y.ltoreq.0.05, 0.01.ltoreq.x+y<0.10, and 0.002<z.ltoreq.0.06. The additional component consists comprises Li.sub.2 O )or B.sub.2 O.sub.3), SiO.sub.2 and MO (MO is at least one metal oxide selected from the group consisting of BaO, SrO, CaO, MgO and ZnO).
    Type: Grant
    Filed: October 17, 1991
    Date of Patent: January 19, 1993
    Assignee: Taiyo Yuden Kabusikigaisha
    Inventors: Hirokazu Chazono, Mutsumi Honda, Hirosi Kisi, Hirosi Saito, Hisamitsu Shizuno
  • Patent number: 5181154
    Abstract: A circuit arrangement for current supply in processes of electrochemically initiated plasma-chemical layer production. It is preferably applied in the plasma-chemical conversion of electrochemically pre-formed layers, e.g. on light metals. The output of the adjustable three-phase transformer with subsequently connected 6-pulse rectifier circuit is branched twice, wherein a first bridge circuit comprises a capacitor connected in parallel to a voltage sensor. A second bridge circuit contains a freewheeling diode parallel to the current limiting choke and the bath for process implementation. A pulse analyzer is arranged parallel to the latter, and the two bridge circuits are separated by a switch element.
    Type: Grant
    Filed: April 1, 1992
    Date of Patent: January 19, 1993
    Assignee: Jenoptik GmbH
    Inventors: Jens Haupt, Kirstin Haupt, Henry Hornhauer
  • Patent number: 5181156
    Abstract: A micromachined capacitor structure having integral travel stops (19, 22, 22') within an active region of the capacitor is provided. The capacitor structure is formed on a substrate (11) and includes a moving capacitor plate (15) supported by one or more flexing arms (17) mechanically anchored to the substrate (11). The moving capacitor plate (15) has an active region (15) substantially parallel to the substrate (11) and separated from the substrate (11) by a first spacing. A corrugation (19) is formed in the moving capacitor plate (15) over the substrate (11) and separated from the substrate (11) by a second spacing, wherein the second spacing is smaller than the first spacing.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: January 19, 1993
    Assignee: Motorola Inc.
    Inventors: Ronald J. Gutteridge, Ljubisa Ristic
  • Patent number: 5179507
    Abstract: In order to prevent an incorporated fuse in a solid electrolyte capacitor from being disconnected by mechanical stress after the attachment thereof and to maximize the capacity of the fuse-incorporated capacitor element by reducing the space for attachment of the fuse; a solid electrolyte capacitor equipped with an opening mechanism is structured in a manner such that a fuse connecting portion is constructed by a three layered structure in which an insulator is sandwiched between an anode terminal and a metal piece connected to an anode lead terminal, and a fuse is disposed in a cross-linking manner between the metal piece and the anode lead terminal. With this arrangement, according to the present inveniton, it is possible to prevent the fuse from being broken or disconnected from the connecting portions by mechanical impacts after connection of the incorporated fuse.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: January 12, 1993
    Assignee: NEC Corporation
    Inventor: Keiji Iijima
  • Patent number: 5179499
    Abstract: Mechanically movable microstructure fabricated from a single crystal such as silicon and actuator structures for providing a high degree of controlled, precision motion of nanometer-scale.
    Type: Grant
    Filed: April 14, 1992
    Date of Patent: January 12, 1993
    Assignee: Cornell Research Foundation, Inc.
    Inventors: Noel C. MacDonald, Jun J. Yao
  • Patent number: 5177528
    Abstract: The present invention provides an aligning apparatus which is capable of aligning auxiliary connecting plates such as a testing fixture plate so as to fit to both sides of a substrate. A camera 13a monitors aligning marks provided on a substrate 6 and a first auxiliary connecting plate (i.e. a lower surface testing fixture plate) 8 to carry out an aligning operation by moving the substrate 6 by means of an XY.THETA. table 5. A first plate-fitting member (a vacuum suction member) 32 fixes the substrate 6 and the first auxiliary connecting plate 8. On the other hand, a camera 13b monitors aligning marks provided on the substrate 6 and a second auxiliary connecting plate (i.e. an upper surface testing fixture plate) 11 to carry out an aligning operation by moving the second auxiliary connecting plate 11 by means of the XY.THETA. table 5. A second plate-fitting member (a vacuum suction member) 33 fixes the substrate 6 and the second auxiliary connecting plate 11.
    Type: Grant
    Filed: May 26, 1992
    Date of Patent: January 5, 1993
    Assignee: Hitachi Techno Engineering Co., Ltd.
    Inventors: Isao Koromegawa, Terumi Ogawa, Masashi Takagaki, Hironori Toyoshima
  • Patent number: 5177674
    Abstract: A fused solid electrolytic capacitor comprises a cathode part formed by applying a first external conductive layer on the solid electrolyric capacitor element, connecting a fuse wire to the first external conductive layer, applying, in turn, an insulating resin layer and a second external conductive layer onto the solid electrolytic capacitor element so that an electrical bridge is formed between the first and second external conductive layers of the solid electrolytic capacitor through the fuse wire which is connected to the first external conductive layer and then electrically connecting the second external conductive layer and the external cathode terminal. According to such a capacitor structure, the fuse wire would not be broken due to, for instance, vibration, the reliability of connection of the fuse wire and yield of the capacitor are markedly improved since the fuse wire is firmly fixed.
    Type: Grant
    Filed: January 28, 1992
    Date of Patent: January 5, 1993
    Assignee: NEC Corporation
    Inventor: Yukio Sugisaki
  • Patent number: 5177663
    Abstract: A multilayer discoidal capacitor having a plurality of laterally spaced, planar electrodes disposed within a dielectric body and configured such that the capacitance characteristic of the capacitor is determined at least in part by the concentrated charge distribution in the "stray" electric fields arising between the edges of the electrodes and at least one cylindrical electrode extending perpendicularly to the planar electrodes.
    Type: Grant
    Filed: May 3, 1991
    Date of Patent: January 5, 1993
    Assignee: Oxley Developments Company Limited
    Inventors: Howard G. Ingleson, Pamela H. Pugh
  • Patent number: 5177662
    Abstract: A capacitance humidity sensor according to the invention has a film core which is in contact with a pair of polymeric conductive layers bonded to opposite faces of the core. The core is made of a polymeric material having a dielectric constant which varies substantially linearly with humidity, such as a polyimide or polyparabanic acid. The conductive layers are made of a polymeric material, at least a portion of which includes sulfur atoms in the backbone chain and having conductive particles, such as carbon particles, dispersed therein. Such conductive layers provide superior performance and corrosion resistance in comparison to the metal films employed in the prior art and in comparison to cellulosic polymers containing conductive particles.
    Type: Grant
    Filed: February 5, 1992
    Date of Patent: January 5, 1993
    Assignee: Johnson Service Company
    Inventor: Paul E. Thoma
  • Patent number: 5177673
    Abstract: An electrolyte for driving electrolytic capacitors and electrolytic capacitors using the electrolyte are described. The electrolyte comprises at least one quaternary ammonium salt of aliphatic saturated dicarboxylic acid having from 6 to 10 carbon atoms in total or a quaternary ammonium salt of glutaric acid, dissolved in a solvent comprised of an aliphatic polyol. When applied to an electrolytic capacitor, the electrolyte ensures improvements in loss characteristic and high temperature characteristics with time. Thus, the capacitor has a prolonged life.
    Type: Grant
    Filed: April 3, 1990
    Date of Patent: January 5, 1993
    Assignees: Matsushita Electric Industrial Co., Ltd., Sanyo Chemical Industries, Ltd.
    Inventors: Hisao Nagara, Hideki Shimamoto, Keiji Mori, Noriki Ushio, Katsuji Shiono, Takaaki Kishi
  • Patent number: 5177661
    Abstract: The present invention relates to the fabrication of diaphragm pressure sensors utilizing silicon-on-insulator technology where recrystallized silicon forms a diaphragm which incorporates electronic devices used in monitoring pressure. The diaphragm is alternatively comprised of a silicon nitride having the necessary mechanical properties with a recrystallized silicon layer positioned thereon to provide sensor electronics.
    Type: Grant
    Filed: March 6, 1992
    Date of Patent: January 5, 1993
    Assignee: Kopin Corporation
    Inventors: Paul M. Zavracky, Richard H. Morrison, Jr.
  • Patent number: 5177670
    Abstract: Noise generated at high frequencies at the time of simultaneous switchings of logical circuits is reduced by lowering an inductance from LSI to a capacitor formed on a substrate. The capacitor is formed to ensure that an inductance from a bonding pad for the LSI loaded on the substrate to an electrode of the capacitor is 0.05 nanohenry. The lower inductance from the LSI to the capacitor allows a reduction in the amount of the noise at high frequencies among those generated in power supply system, whereby the rising time of signals is made shorter, and the speed of arithmetic operation can be increased.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: January 5, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Hiroichi Shinohara, Hirokazu Inoue, Yoichi Abe, Akira Kato, Hideo Suzuki, Kazuji Yamada, Masaaki Takahashi, Keiichirou Nakanishi
  • Patent number: 5175674
    Abstract: An electrolyte adapted for use as fill electrolytes in eletrolytic capacitors having aluminum cathodes and anodes useful in a low to high voltage operating range which electrolyte contains an improved non-toxic depolarizer.
    Type: Grant
    Filed: March 24, 1992
    Date of Patent: December 29, 1992
    Assignee: North American Philips Corporation
    Inventor: Roland F. Dapo
  • Patent number: 5173835
    Abstract: A voltage variable capacitor (10) has as the base substrate a silicon wafer with a layer of high resistivity semiconductor material on top of the substrate. An insulating layer (16) of a metal oxide having a dielectric constant greater than the dielectric constant of the semiconductors (12), such as zirconium titanate, is formed on top of the high resistivity layer, and a metal electrode (18) is formed on the insulating layer (16). When the electrode is energized, a depletion layer (20) is formed in the high resistivity layer. By varying the voltage applied to the electrode, the capacitance of the device is altered.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: December 22, 1992
    Assignee: Motorola, Inc.
    Inventors: Kenneth D. Cornett, E. S. Ramakrishnan, Gary H. Shapiro, Raymond M. Caldwell, Wei-Yean Howng
  • Patent number: 5173836
    Abstract: A hermetically sealed interface is constructed with a substrate (101) having a first surface (103) with a first orifice (201). The substrate (101) also has an opposing second surface (105) with a second orifice (205). The first and second orifices (201, 205) are connected via a passageway (107). The passageway (107) has an inner surface (209) with a first metal coating (111). The first metal coating (111) and the substrate (101) provide a first predetermined thermal coefficient of expansion for the passageway (107). A plug (221) with an outer surface (223) has a second metal coating (225). The second metal coating (225) and the plug (221) provide a second predetermined thermal coefficient of expansion substantially similar to the first predetermined thermal coefficient of expansion of the passageway (107). The plug (221) is disposed in the passageway (107) of the substrate (101).
    Type: Grant
    Filed: March 5, 1992
    Date of Patent: December 22, 1992
    Assignee: Motorola, Inc.
    Inventors: Joseph P. Tomase, Shiuh-Hui Chen, Gregory D. Stamm, Marc K. Chason
  • Patent number: 5173588
    Abstract: Food consumption monitor comprising a simple mechanical calculator integrated into a diet guidebook. The calculator includes a manually operable rotary dial with a scale pointer on it, a base for the dial, a means for rotatably mounting the dial to the base, a finger stop attached to the base near the dial, and a set of numerals which are printed in consecutive order on the base near the dial and which are equidistant from the dial's rotary axis. The dial has a set of finger holes or dimples which are equidistant from the dial's rotary axis. The dial's scale pointer is a visually distinctive feature on the dial, such as an annular rim around one of the holes, which rotates with the dial in close proximity to the set of numerals. The base includes a molded plastic casing which partially encloses the dial. This casing includes an axle, a stationary hub, and a support arm for rigidly coupling the hub to a wall of the casing, wherein these three components are the means for rotatably mounting the dial.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: December 22, 1992
    Inventor: Shane Harrah
  • Patent number: 5172304
    Abstract: A flat capacitor-containing wiring board, which can be arranged optionally in the interior of a multilayer substrate. This capacitor-containing wiring board has a dielectric substrate which is made of a mixture of dielectric powder and resin, and conductors which are provided on both major surfaces of the dielectric substrate. The conductors can be etched and shaped so as to form capacitors which use the interior of the wiring board as their dielectric layers. With this wiring board, it is possible to etch the conductors so that the values of the capacitors can be freely selected over a wide range, the wiring board is flexible to some extent, and no pinholes or defects are defined over a wide area. Preferably, the board has a greater relative resin content near its surfaces than in its interior, which improves the dielectric characteristics of the board. The increased resin content may be provided by resin adhesive layers on the surfaces which permeate the board to some extent.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: December 15, 1992
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Jyuichiro Ozawa, Kikuo Wakino
  • Patent number: 5172299
    Abstract: A multilayer capacitor in which a plurality of inner electrodes are laminated while being separated by dielectric layers in a dielectric body, each of the inner electrodes having a plurality of inner electrode fingers formed while being separated by gaps, and respective ones of the plurality of inner electrode fingers having at least two different widths.
    Type: Grant
    Filed: April 19, 1991
    Date of Patent: December 15, 1992
    Assignee: Murata Manufacturing Co., Inc.
    Inventors: Hideshi Yamada, Noboru Kato
  • Patent number: 5172307
    Abstract: An activated carbon/polyacene composite is disclosed. The composite contains activated carbon powder or fiber and having a selected molar ratio range of hydrogen atoms [H] to carbon atoms [C] of 0.01.ltoreq.[H]/[C].ltoreq.0.2. It provides two or more times the capacitance per unit volume, and enables reduction of the equivalent series resistance of an electric double-layer capacitor without compression. It therefore is a suitable composite for use as polarizable electrodes for electric double-layer capacitors. The composite can be made by mixing activated carbon powder or fiber and a thermosetting resin powder such as phenolin resin powder, and subjecting the mixture to heat treatment in a nonoxidizing atmosphere at temperatures between 600.degree. and 1000.degree. C. which is insufficient to reach full carbonization of the thermosetting resin.
    Type: Grant
    Filed: March 3, 1992
    Date of Patent: December 15, 1992
    Assignee: NEC Corporation
    Inventors: Junji Tabuchi, Takashi Saito, Atsushi Ochi, Yukari Shimizu