Patents by Inventor Kentaro Setsune
Kentaro Setsune 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: 6984540Abstract: A surface acoustic wave device includes a piezoelectric substrate, a first interdigital transducer and a second interdigital transducer formed on the substrate so that the first and second interdigital transducers are opposed to each other. The substrate includes a doping region that is doped with a substance in at least one form selected from the group consisting of atoms, molecules and clusters in a surface between the first and second interdigital transducers.Type: GrantFiled: July 23, 2003Date of Patent: January 10, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Mitihiko Takase, Michio Okajima, Akihisa Yoshida, Kentaro Setsune, Kouzou Murakami, Kunihiro Fujii
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Patent number: 6741142Abstract: A high-frequency circuit element including a substrate, a high-frequency circuit formed on the substrate, a metal box electromagnetically shielding the high-frequency circuit by enclosing the substrate and an input/output terminal placed on the metal box and inputting/outputting a high-frequency signal to/from the high-frequency circuit. Adding at least one plate for interrupting unwanted higher-order mode cutting off the propagation path of the high frequency waves in the space inside the metal box by substantially dividing the space inside the metal box makes it possible to cut off the propagation path where the high frequency waves propagates in the space inside the box and to suppress excitation and propagation of the unwanted higher-order mode that adversely affects the frequency characteristic of the high frequency circuit element.Type: GrantFiled: March 10, 2000Date of Patent: May 25, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasunao Okazaki, Akira Enokihara, Kentaro Setsune
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Publication number: 20040095038Abstract: A surface acoustic wave device includes a piezoelectric substrate, a first interdigital transducer and a second interdigital transducer formed on the substrate so that the first and second interdigital transducers are opposed to each other. The substrate includes a doping region that is doped with a substance in at least one form selected from the group consisting of atoms, molecules and clusters in a surface between the first and second interdigital transducers.Type: ApplicationFiled: July 23, 2003Publication date: May 20, 2004Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Mitihiko Takase, Michio Okajima, Akihisa Yoshida, Kentaro Setsune, Kouzou Murakami, Kunihiro Fujii
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Patent number: 6381478Abstract: A high-frequency circuit element that realizes a high degree of input-output coupling without causing an increase in loss and irregularity in impedance. A resonator made of a conductor film is formed on a substrate made of a dielectric monocrystal or the like. An input-output line made of a conductor film having a uniform line width is formed on the same surface of the substrate as the surface on which the resonator is formed. A part of the side edge of the input-output line is located along a coupling part on the peripheral part of the resonator and spaced from the resonator by a gap part.Type: GrantFiled: May 5, 1998Date of Patent: April 30, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akira Enokihara, Kentaro Setsune
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High-frequency circuit element having a superconductive resonator tuned by another movable resonator
Patent number: 6360112Abstract: In a small transmission line type high-frequency circuit element that has small loss due to conductor resistance and has a high Q value, an error in the dimension of a pattern, etc. can be corrected to adjust element characteristics. An elliptical shape resonator (12) that is formed of an electric conductor is formed on a substrate (11a), while a pair of input-output terminals (13) are formed on a substrate (11b). Substrate (11a) on which resonator (12) is formed and substrate (11b) on which input-output terminal (13) is formed are located parallel to each other, with a surface on which resonator (12) is formed and a surface on which input-output terminal (13) is formed being opposed. Substrates (11a) and (11b) that are located parallel to each other are relatively moved by a mechanical mechanism that uses a screw and moves slightly. Also, substrate (11a) is rotated by the mechanical mechanism that uses a screw and moves slightly around the center axis of resonator (12) as a rotation axis (18).Type: GrantFiled: October 8, 1999Date of Patent: March 19, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koichi Mizuno, Akira Enokihara, Hidetaka Higashino, Kentaro Setsune -
Patent number: 6360111Abstract: In a small transmission line type high-frequency circuit element that has small loss due to conductor resistance and has a high Q value, an error in the dimension of a pattern, etc. can be corrected to adjust element characteristics. An elliptical shape resonator (12) that is formed of an electric conductor is formed on a substrate (11a), while a pair of input-output terminals (13) are formed on a substrate (11b). Substrate (11a) on which resonator (12) is formed and substrate (11b) on which input-output terminal (13) is formed are located parallel to each other, with a surface on which resonator (12) is formed and a surface on which input-output terminal (13) is formed being opposed. Substrates (11a) and (11b) that are located parallel to each other are relatively moved by a mechanical mechanism that uses a screw and moves slightly. Also, substrate (11a) is rotated by the mechanical mechanism that uses a screw and moves slightly around the center axis of resonator (12) as a rotation axis (18).Type: GrantFiled: October 8, 1999Date of Patent: March 19, 2002Assignee: Matsushita electric Industrial Co., Ltd.Inventors: Koichi Mizuno, Akira Enokihara, Hidetaka Higashino, Kentaro Setsune
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Patent number: 6350999Abstract: In an electron-emitting device, an electron supplying layer for supplying electrons is composed of an n-GaN layer. An electron transferring layer for moving electrons toward the surface is composed of non-doped (intrinsic) AlxGa1−xN (0≦x≦1) having a graded composition for the Al concentration x. A surface layer is composed of non-doped AlN having a negative electron affinity (NEA). The electron transferring layer composed of AlxGa1−xN has a band gap which is enlarged nearly continuously from the electron supplying layer to the surface layer and a negative electron affinity or a positive electron affinity close to zero. If such a voltage V as to render the surface electrode side positive is applied, the band of AlxGa1−xN is bent, whereby a current derived mainly from a diffused current flows from the electron supplying layer to the surface layer through the electron transferring layer. Thereby excellent electron emitting characteristic is obtained.Type: GrantFiled: November 29, 1999Date of Patent: February 26, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takeshi Uenoyama, Takao Tohda, Masahiro Deguchi, Makoto Kitabatake, Kentaro Setsune
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Publication number: 20020004462Abstract: A high-frequency circuit element that realizes a high degree of input-output coupling without causing an increase in loss and irregularity in impedance. A resonator made of a conductor film is formed on a substrate made of a dielectric monocrystal or the like. An input-output line made of a conductor film having a uniform line width is formed on the same surface of the substrate as the surface on which the resonator is formed. A part of the side edge of the input-output line is located along a coupling part on the peripheral part of the resonator and spaced from the resonator by a gap part.Type: ApplicationFiled: May 5, 1998Publication date: January 10, 2002Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: AKIRA ENOKIHARA, KENTARO SETSUNE
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Patent number: 6252475Abstract: A plurality of circular or elliptical first, second, and third strip conductors are formed on the surface of a substrate made of a dielectric single crystal. The first, second, and third strip conductors are coupled to one another via gap portions. A ground plane is formed on the entire rear surface of the substrate. A first coupling terminal and a second coupling terminal are inductively coupled to the first planar circuit resonator in directions where first and second coupling terminal excite the two resonant modes of the first planar circuit resonator, which are orthogonally polarized.Type: GrantFiled: June 11, 1999Date of Patent: June 26, 2001Assignee: Matsushita Electric Industrial Co. Ltd.Inventors: Akira Enokihara, Kentaro Setsune
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Patent number: 6239674Abstract: A resonator having high Q-value has a compact structure with little loss caused by the conductor's resistance. The resonator includes a high-frequency circuit element. Two points on the circumference of the conductor of elliptical shape which forms the resonator at which both of the two dipole modes of the resonant modes of the resonator polarizing orthogonally are excited equally and are located at neighboring positions input/output bonding points. The input/output terminals are bonded to the resonator at the input/output bonding points.Type: GrantFiled: December 21, 1994Date of Patent: May 29, 2001Assignee: Matsushita Electric Industrial Co., LtdInventors: Akira Enokihara, Kentaro Setsune
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Patent number: 6178339Abstract: A high power filter apparatus which is used in a mobile communication base station or the like is provided wherein the temperature stability and frequency selection are excellent, an insertion loss is small, the size is small, power consumption is low and costs are low. A shield case block comprises signal input and output portions, and a plurality of closed spaces which house a filter element connected between the signal input and output portions. A cooling plate is provide in a heat insulating container which houses the shield case block. The shield case block is fixed to the cooling plate in the thermal contact state. Each filter element is place almost in parallel. A cylindrical hole having an axis which is almost parallel with the face of the filter element penetrates the shield case block. A ground rod made of a conductor which changes the volume of the closed space is provided on the inner end portion of a movable member which moves in the axial direction of the cylindrical hole.Type: GrantFiled: April 8, 1996Date of Patent: January 23, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masahiro Sakai, Hidetaka Higashino, Kentaro Setsune
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Patent number: 6160266Abstract: This invention provides a superconducting device with good characteristics that can be reproduced at an arbitrary place on a substrate and a method of manufacturing the same. A convex region (a processed, linearly shaped platinum thin film) of oriented metal is provided on a substrate as a gate electrode. Then, an oxide insulating film (SrTiO.sub.3 thin film) is deposited on the convex region, and further a YBa.sub.2 Cu.sub.3 O.sub.7 oxide superconducting thin film is deposited on the oxide insulating film. Accordingly, a grain boundary part is formed on the convex region. A drain electrode and a source electrode are formed facing each other with the grain boundary part between.Type: GrantFiled: February 20, 1997Date of Patent: December 12, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akihiro Odagawa, Hideaki Adachi, Kentaro Setsune
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Patent number: 6147360Abstract: This invention provides a superconducting device with good characteristics that can be reproduced at an arbitrary place on a substrate and a method of manufacturing the same. A convex region (a processed, linearly-shaped platinum thin film) of oriented metal is provided on a substrate as a gate electrode. Then, an oxide insulating film (SrTiO.sub.3 thin film) is deposited on the convex region, and further a YBa.sub.2 Cu.sub.3 O.sub.7 oxide superconducting thin film is deposited on the oxide insulating film. Accordingly, a grain boundary part is formed on the convex region. A drain electrode and a source electrode are formed facing each other with the grain boundary part in between.Type: GrantFiled: May 21, 1998Date of Patent: November 14, 2000Assignee: Matsushita Electric Industrial Co. Ltd.Inventors: Akihiro Odagawa, Hideaki Adachi, Kentaro Setsune
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Patent number: 6016434Abstract: In a small transmission line type high-frequency circuit element that has small loss due to conductor resistance and has a high Q value, an error in the dimension of a pattern, etc. can be corrected to adjust element characteristics. An elliptical shape resonator (12) that is formed of an electric conductor is formed on a substrate (11a), while a pair of input-output terminals (13) are formed on a substrate (11b). Substrate (11a) on which resonator (12) is formed and substrate (11b) on which input-output terminal (13) is formed are located parallel to each other, with a surface on which resonator (12) is formed and a surface on which input-output terminal (13) is formed being opposed. Substrates (11a) and (11b) that are located parallel to each other are relatively moved by a mechanical mechanism that uses a screw and moves slightly. Also, substrate (11a) is rotated by the mechanical mechanism that uses a screw and moves slightly around the center axis of resonator (12) as a rotation axis (18).Type: GrantFiled: December 17, 1996Date of Patent: January 18, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koichi Mizuno, Akira Enokihara, Hidetaka Higashino, Kentaro Setsune
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Patent number: 5996199Abstract: A surface acoustic module is stable, and its operation frequencies can be varied with high precision. A method of manufacturing the surface acoustic module prevents the module's electrodes from being broken during separation of a sheet of modules into individual components. The surface acoustic module includes electrodes for transmitting and receiving a surface acoustic wave, a surface acoustic wave transmitting substrate, a high resistance thin film, and a thin film for differentiating the transmission velocity of a surface acoustic wave at the high resistance thin film from that at the substrate. The method includes the steps of forming a metallic film on a sheet of the surface acoustic wave transmitting substrate, of forming the electrodes on the metallic film, and of irradiating light or the like to the metallic film so as to increase the film's resistivity.Type: GrantFiled: July 22, 1998Date of Patent: December 7, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yo Ichikawa, Hideaki Adachi, Kentaro Setsune, Syunichiro Kawashima
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Patent number: 5885937Abstract: This invention provides a superconducting tunnel junction element showing satisfactory Josephson effect. The element includes a Bi-based layered compound such as Bi.sub.2 Sr.sub.2 (Ca.sub.0.6 Y.sub.0.4)Cu.sub.2 O.sub.8, Bi.sub.2 Sr.sub.2 Cu.sub.2 O.sub.6 and Bi.sub.2 Sr.sub.2 CaCu.sub.2 O.sub.8 as the barrier layer between the superconducting oxide electrodes. The structural matching of the superconducting oxide with the Bi-based compound is supposed to be good. Some kinds of Cu-based superconducting oxides such as YSr.sub.2 Cu.sub.2.7 Re.sub.0.3 O.sub.7, Sr.sub.2 CaCu.sub.2 O.sub.6 and (La.sub.0.9 Sr.sub.0.1).sub.2 CuO.sub.4 are used for the electrodes to obtain a Josephson element which can work at a high temperature. When using the superconducting oxides including Ba such as YBa.sub.2 Cu.sub.3 O.sub.7 for the electrode, forming a thin film between the electrode and the barrier is better to prevent Ba from reacting with Bi in the barrier layer.Type: GrantFiled: July 7, 1997Date of Patent: March 23, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hideaki Adachi, Masahiro Sakai, Akihiro Odagawa, Kentaro Setsune
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Patent number: 5869846Abstract: A superconducting junction device which is easily manufactured, multifunctional, and utilizes the superconducting Josephson effects is described. A first junction (Josephson junction) and a second junction (Josephson junction) are disposed o a substrate across a coupling portion of a dielectric. The first junction comprises a first upper electrode, a first barrier layer and a first lower electrode. The second junction comprises a second upper electrode, a second barrier layer and a second lower electrode. The first lower electrode and the second lower electrode are connected in series via a connecting electrode. A superconducting reflecting wall which is connected via the connecting electrode is provided around the two Josephson junctions including the coupling portion.Type: GrantFiled: March 22, 1996Date of Patent: February 9, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hidetaka Higashino, Masahiro Sakai, Kentaro Setsune
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Patent number: 5856204Abstract: A plurality of single crystal grains made of Bi.sub.2 Sr.sub.2 Ca.sub.1 Cu.sub.2 O.sub.8 which are heat treated at a temperature that is equal to or higher than the crystallization temperature of an oxide high-temperature superconductor made of Bi.sub.2 Sr.sub.2 Ca.sub.1 Cu.sub.2 O.sub.8 and are surrounded by a grain boundary are formed on a substrate made of a MgO single crystal. A convex portion having a sectional area of 400 .mu.m.sup.2 or less and a height which is equal to or less than ten times as much as a space between block layers of Bi.sub.2 Sr.sub.2 Ca.sub.1 Cu.sub.2 O.sub.8 is formed on the upper face portion of the single crystal grain. A first electrode made of Au is formed on the upper face of the convex portion of the single crystal grain, and a second electrode is formed in a region other than the convex portion in the single crystal grain. The first electrode is insulated from the second electrode by an insulating film made of CaF.sub.2.Type: GrantFiled: September 27, 1996Date of Patent: January 5, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masahiro Sakai, Hidetaka Higashino, Hideaki Adachi, Kentaro Setsune
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Patent number: 5828079Abstract: A field-effect type superconducting device includes a channel layer. The channel layer includes Bi-based oxide compound containing Cu. A source electrode contacts the channel layer. A drain electrode contacts the channel layer. A gate insulating film made of insulating material extends on on the channel layer. A gate electrode extends on the gate insulating film.Type: GrantFiled: June 24, 1993Date of Patent: October 27, 1998Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koichi Mizuno, Hideaki Adachi, Yo Ichikawa, Kentaro Setsune
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Patent number: 5815900Abstract: A surface acoustic module is stable, and its operation frequencies can be varied with high precision. A method of manufacturing the surface acoustic module prevents the module's electrodes from being broken during separation of a sheet of modules into individual components. The surface acoustic module includes electrodes for transmitting and receiving a surface acoustic wave, a surface acoustic wave transmitting substrate, a high resistance thin film, and a thin film for differentiating the transmission velocity of a surface acoustic wave at the high resistance thin film from that at the substrate. The method includes the steps of forming a metallic film on a sheet of the surface acoustic wave transmitting substrate, of forming the electrodes on the metallic film, and of irradiating light or the like to the metallic film so as to increase the film's resistivity.Type: GrantFiled: November 9, 1995Date of Patent: October 6, 1998Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yo Ichikawa, Hideaki Adachi, Kentaro Setsune, Syunichiro Kawashima