Patents by Inventor Shunichi Murakawa
Shunichi Murakawa 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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Publication number: 20120218054Abstract: A dielectric ceramic which is capable of stably having a desired relative dielectric constant (?r), while having high Q value and good temperature coefficient of the resonance frequency. Specifically disclosed is a dielectric ceramic which contains lanthanum, magnesium, calcium and titanium, and when the compositional formula of the components is expressed as ?La2Ox.?MgO.?CaO.?TiO2 (wherein 3?x?4), the molar ratios ?, ?, ? and ? satisfy the formulae below. The dielectric ceramic also contains aluminum in an amount of 5% by mass or less (excluding 0% by mass) in terms of oxides relative to 100% by mass of the above-mentioned components. 0.160???0.270 0.050???0.100 0.260???0.390 0.360???0.Type: ApplicationFiled: October 29, 2010Publication date: August 30, 2012Applicant: KYOCERA CORPORATIONInventors: Satoshi Toyoda, Seiichirou Hirahara, Shunichi Murakawa, Tsuyoshi Komatsu
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Publication number: 20110254642Abstract: Disclosed is a dielectric ceramic which contains, as the main component, a crystal containing La, Al, Ca and Ti and additionally contains a molybdenum oxide.Type: ApplicationFiled: December 25, 2009Publication date: October 20, 2011Applicant: KYOCERA CORPORATIONInventors: Shiho Enokida, Shunichi Murakawa
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Publication number: 20110001586Abstract: Provided is a dielectric ceramics having crystals of a composition formula: aBaO.bCoO.cZnO.dNb2O5 wherein coefficients a, b, c and d satisfy 0.498?a<0.500, 0.066?b?0.132, 0.033?c?0.099, and 0.335?d?0.338. Provided is a dielectric ceramics having crystals composed of BaO, CoO, ZnO, and Nb2O5, wherein a peak strength ratio IA/IB between a crystal peak IA existing in the vicinity of 2?=18° and a crystal peak IB existing in the vicinity of 2?=31° in an X-ray diffraction chart is 0.003 or more. Provided is a resonator using the dielectric ceramics as a dielectric body.Type: ApplicationFiled: November 27, 2008Publication date: January 6, 2011Applicant: Kyocera CorporationInventors: Satoshi Toyoda, Shunichi Murakawa
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Publication number: 20100331167Abstract: An object of the present invention is to provide ceramics for decorative component which has golden color tone and provides high-grade impression, aesthetic satisfaction and mind soothing effect, and has high mechanical properties such as hardness and toughness with less color difference. The present invention relates to a ceramics for decorative component, composed of titanium nitride-based sintered material which contains titanium nitride as a main component, wherein the titanium nitride-based sintered material contains nickel, niobium, chromium and carbon, and wherein a content of carbon is not less than 0.5% by mass nor more than 0.9% by mass. According to the ceramics for decorative component of the present invention, it is possible to have better mechanical properties such as hardness and toughness since carbon diffuses and forms solid solution with titanium nitride that accelerates the sintering process.Type: ApplicationFiled: November 21, 2008Publication date: December 30, 2010Applicant: KYOCERA CORPORATIONInventors: Mizuho Ohta, Shunichi Murakawa
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Patent number: 7196667Abstract: A surface-mount type antenna includes a rectangular-parallelepiped base body made of a dielectric or magnetic material, having a first surface to be placed on a target substrate, second to fifth surfaces that are continuous with the first surface, and a sixth surface located in parallel with the first surface; a ground electrode formed on at least one of the second to fifth surfaces; two radiating electrodes that are continuous with the ground electrode and extend over two or more adjacent surfaces of the second to sixth surfaces; and two feeding electrodes formed on at least one of the second to fifth surfaces so as to be spaced apart circumferentially of the continuum of the second to fifth surfaces to provide the ground electrode in between. The feeding electrode is capacitance-coupled to the radiating electrode for effecting feeding.Type: GrantFiled: August 26, 2005Date of Patent: March 27, 2007Assignee: Kyocera CorporationInventors: Kazuo Watada, Shunichi Murakawa, Akinori Sato, Koji Hamada
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Patent number: 7142160Abstract: In order to provide a small size antenna where excellent antenna properties can be stably gained, a frequency adjustment is easy and a simple measurement is possible, according to the present invention, a small size antenna formed of a conductor of at least two adjoining surfaces of a base in rectangular parallelepiped form made of dielectric ceramics is characterized in that: a step is made of a flat portion parallel to one surface of the two adjoining surfaces and an inclining portion located between the one surface and the flat portion, in a corner portion of the two surfaces on which the conductor is formed; the width of the flat portion is 0.08 mm or less; and a border portion between the flat portion and the other surface of the two adjoining surfaces is a curve having a curvature radius R of 0.03 mm to 0.2 mm.Type: GrantFiled: September 10, 2004Date of Patent: November 28, 2006Assignee: Kyocera CorporationInventors: Tsuyoshi Furuno, Kazuo Watada, Koji Hamada, Shunichi Murakawa
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Patent number: 7026994Abstract: An surface-mount type antenna includes a rectangular parallelepiped base body, a feeding terminal formed at one-end-side part of one side surface thereof, and a radiating electrode, to one end of which is connected the feeding terminal, disposed such that its other end is routed from one-end-side part of one side surface, through one-end-side part of one principal surface, to another-end-side part of one principal surface, and extends from the other-end-side part to the one end side part parallelly with a ridge of the base body, and is eventually formed into an open end. An antenna apparatus is constructed by mounting the surface-mount type antenna on a mounting substrate having a feeding electrode and a ground conductor layer with a linear side edge located near the feeding electrode, with the ridge of the base body arranged parallel to the linear side edge of the ground conductor layer.Type: GrantFiled: December 12, 2003Date of Patent: April 11, 2006Assignee: Kyocera CorporationInventors: Takanori Ikuta, Akinori Sato, Kazuo Watada, Shunichi Murakawa
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Publication number: 20060049990Abstract: A surface-mount type antenna includes a rectangular-parallelepiped base body made of a dielectric or magnetic material, having a first surface to be placed on a target substrate, second to fifth surfaces that are continuous with the first surface, and a sixth surface located in parallel with the first surface; a ground electrode formed on at least one of the second to fifth surfaces; two radiating electrodes that are continuous with the ground electrode and extend over two or more adjacent surfaces of the second to sixth surfaces; and two feeding electrodes formed on at least one of the second to fifth surfaces so as to be spaced apart circumferentially of the continuum of the second to fifth surfaces to provide the ground electrode in between. The feeding electrode is capacitance-coupled to the radiating electrode for effecting feeding.Type: ApplicationFiled: August 26, 2005Publication date: March 9, 2006Inventors: Kazuo Watada, Shunichi Murakawa, Akinori Sato, Koji Hamada
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Patent number: 6970135Abstract: The invention provides an antenna apparatus including a driven element formed of a rectangular conductor, and a grounding plate which is arranged in proximity to at least one of side edges of the driven element, with a predetermined interval secured therebetween. This construction requires less mounting space, achieves wide bandwidth and low conductor loss.Type: GrantFiled: September 18, 2002Date of Patent: November 29, 2005Assignee: Kyocera CorporationInventors: Akinori Sato, Shunichi Murakawa, Kazuo Watada, Hiroshi Yoshizaki
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Patent number: 6916559Abstract: A member used within a plasma processing apparatus and exposed to a plasma of a halogen gas such as BCl3 or Cl2 is formed from a sintered body of metals of Group IIIa of Periodic Table such as Y, La, Ce, Nd and Dy, and Al and/or Si, for example, 3Y2O3.5Al2O3, 2Y2O3.Al2O3, Y2O3.Al2O3 or disilicate or monosilicate, and in particular, in this sintered body, the content of impurity metals of Group IIa of Periodic Table contained in the sintered body is controlled to be 0.15 wt % or more in total. Specifically, for this member, an yttrium-aluminum-garnet sintered body having a porosity of 3% or less and also having a surface roughness of 1 ?m or less in center line average roughness Ra is utilized.Type: GrantFiled: July 17, 2002Date of Patent: July 12, 2005Assignee: Kyocera CorporationInventors: Shunichi Murakawa, Yumiko Itoh, Hiroshi Aida, Katsumi Nakamura, Tetsuzi Hayasaki
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Patent number: 6903691Abstract: The surface-mount type antenna includes: a substantially rectangular parallelepiped base body; feeding and ground terminals formed on one side surface of the base body; and a radiating electrode, to one end of which is connected the ground terminal, disposed such that its other end extends from one side surface, through another end side part of one principal surface of the base body, to the one end side part thereof, then turns to the other end side part; and is eventually formed into an open end located near the other end side part. The feeding terminal is disposed near the radiating electrode. The antenna apparatus is constructed by mounting the surface-mount type antenna on the mounting substrate having the feeding electrode, the ground electrode, and the ground conductor layer.Type: GrantFiled: November 26, 2003Date of Patent: June 7, 2005Assignee: Kyocera CorporationInventors: Akinori Sato, Takanori Ikuta, Kazuo Watada, Shunichi Murakawa
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Publication number: 20050062650Abstract: In order to provide a small size antenna where excellent antenna properties can be stably gained, a frequency adjustment is easy and a simple measurement is possible, according to the present invention, a small size antenna formed of a conductor of at least two adjoining surfaces of a base in rectangular parallelepiped form made of dielectric ceramics is characterized in that: a step is made of a flat portion parallel to one surface of the two adjoining surfaces and an inclining portion located between the one surface and the flat portion, in a corner portion of the two surfaces on which the conductor is formed; the width of the flat portion is 0.08 mm or less; and a border portion between the flat portion and the other surface of the two adjoining surfaces is a curve having a curvature radius R of 0.03 mm to 0.2 mm.Type: ApplicationFiled: September 10, 2004Publication date: March 24, 2005Inventors: Tsuyoshi Furuno, Kazuo Watada, Koji Hamada, Shunichi Murakawa
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Patent number: 6822620Abstract: The helical antenna comprises a base body and a helically-configured conductor on a top surface of the base body, wherein base body's thickness a is given as 0.3≦a≦3 (mm); length b is given as 5≦b≦20 (mm); and relative dielectric constant &egr;r is given as 3≦&egr;r≦30, and conductor's winding number x is given as 3≦x≦16 (turns), and its resonant frequency f and conductor width w satisfy formulae (1): f=Ax+By+C (MHz) and (2): w=Dx+E (mm), where y represents base body width and A through E represent constants determined according to the base body's thickness a, length b, and relative dielectric constant &egr;r.Type: GrantFiled: March 13, 2003Date of Patent: November 23, 2004Assignee: Kyocera CorporationInventors: Kazuo Watada, Shunichi Murakawa, Hiroshi Yoshizaki, Akinori Sato
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Patent number: 6806832Abstract: In a surface-mount type antenna, a substantially-rectangular solid base body has a feeding terminal and a ground terminal formed on its one side surface. A radiating electrode has its one end connected to the ground terminal and is disposed helically across the surfaces of base body extending from one side surface to one principal surface. Another end of radiating electrode extends from one principal surface, through another side surface, toward another principal surface, to form a wide-area portion facing the feeding terminal. An antenna apparatus is constructed by mounting the surface-mount type antenna on a mounting substrate having formed thereon a feeding electrode, a ground electrode, and a ground conductor layer, and simultaneously connecting the feeding terminal and the ground terminal to the feeding electrode and the ground electrode, respectively.Type: GrantFiled: June 18, 2003Date of Patent: October 19, 2004Assignee: Kyocera CorporationInventors: Akinori Sato, Takanori Ikuta, Kazuo Watada, Shunichi Murakawa
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Publication number: 20040169606Abstract: The surface-mount type antenna includes: a substantially prismatic base body; feeding and ground terminals formed on one side surface of the base body; and a radiating electrode, to one end of which is connected the ground terminal, disposed such that its other end extends from one side surface, through another end side part of one principal surface of the base body, to the one end side part thereof, then turns to the other end side part, and is eventually formed into an open end located near the other end side part. The feeding terminal is disposed near the radiating electrode. The antenna apparatus is constructed by mounting the surface-mount type antenna on the mounting substrate having the feeding electrode, the ground electrode, and the ground conductor layer.Type: ApplicationFiled: November 26, 2003Publication date: September 2, 2004Applicant: KYOCERA CORPORATIONInventors: Akinori Sato, Takanori Ikuta, Kazuo Watada, Shunichi Murakawa
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Publication number: 20040125032Abstract: An surface-mount type antenna includes a rectangular parallelepiped base body, a feeding terminal formed at one-end-side part of one side surface thereof, and a radiating electrode, to one end of which is connected the feeding terminal, disposed such that its other end is routed from one-end-side part of one side surface, through one-end-side part of one principal surface, to another-end-side part of one principal surface, and extends from the other-end-side part to the one end side part parallelly with a ridge of the base body, and is eventually formed into an open end. An antenna apparatus is constructed by mounting the surface-mount type antenna on a mounting substrate having a feeding electrode and a ground conductor layer with a linear side edge located near the feeding electrode, with the ridge of the base body arranged parallel to the linear side edge of the ground conductor layer.Type: ApplicationFiled: December 12, 2003Publication date: July 1, 2004Applicant: KYOCERA CORPORATIONInventors: Takanori Ikuta, Akinori Sato, Kazuo Watada, Shunichi Murakawa
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Publication number: 20040008141Abstract: In a surface-mount type antenna, a substantially-rectangular solid base body has a feeding terminal and a ground terminal formed on its one side surface. A radiating electrode has its one end connected to the ground terminal and is disposed helically across the surfaces of base body extending from one side surface to one principal surface. Another end of radiating electrode extends from one principal surface, through another side surface, toward another principal surface, to form a wide-area portion facing the feeding terminal. An antenna apparatus is constructed by mounting the surface-mount type antenna on a mounting substrate having formed thereon a feeding electrode, a ground electrode, and a ground conductor layer, and simultaneously connecting the feeding terminal and the ground terminal to the feeding electrode and the ground electrode, respectively.Type: ApplicationFiled: June 18, 2003Publication date: January 15, 2004Applicant: KYOCERA CORPORATIONInventors: Akinori Sato, Takanori Ikuta, Kazuo Watada, Shunichi Murakawa
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Patent number: 6653986Abstract: It is an object of the invention to provide a meander antenna that is smaller and lighter, in which the resonance frequency easily can be tuned, as well as a method for tuning its resonance frequency. The meander antenna comprises a meandering conductor on the surface of a substrate. The meander antenna is provided with a short-circuit conductor line that forms a short-circuit between two parallel opposing lines into which the conductor is bent, or an open conductor line in which a line short-circuiting the two parallel opposing lines is open. The resonance frequency can be tuned and lowered by cutting open the short-circuit line or increased by short-circuiting the open conductor line.Type: GrantFiled: April 26, 2002Date of Patent: November 25, 2003Assignee: Kyocera CorporationInventors: Kazuo Watada, Shunichi Murakawa, Akinori Sato, Hiroshi Yoshizaki
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Publication number: 20030179152Abstract: The helical antenna comprises a base body and a helically-configured conductor on a top surface of the base body, wherein base body's thickness a is given as 0.3≦a≦3 (mm); length b is given as 5≦b≦20 (mm); and relative dielectric constant &egr;r is given as 3≦&egr;r≦30, and conductor's winding number x is given as 3≦x≦16 (turns), and its resonant frequency f and conductor width w satisfy formulae (1): f=Ax+By+C (MHz) and (2): w=Dx+E (mm), where y represents base body width and A through E represent constants determined according to the base body's thickness a, length b, and relative dielectric constant &egr;r.Type: ApplicationFiled: March 13, 2003Publication date: September 25, 2003Applicant: KYOCERA CORPORATIONInventors: Kazuo Watada, Shunichi Murakawa, HIroshi Yoshizaki, Akinori Sato
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Publication number: 20030063036Abstract: The invention provides an antenna apparatus including a driven element formed of a rectangular conductor, and a grounding plate which is arranged in proximity to at least one of side edges of the driven element, with a predetermined interval secured therebetween. This construction requires less mounting space, achieves wide bandwidth and low conductor loss.Type: ApplicationFiled: September 18, 2002Publication date: April 3, 2003Applicant: KYOCERA CORPORATIONInventors: Akinori Sato, Shunichi Murakawa, Kazuo Watada, Hiroshi Yoshizaki