Patents by Inventor Ryuhei Yoshida
Ryuhei Yoshida 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: 8075832Abstract: A solution casting apparatus includes a drive roller as a conveying means. The drive roller conveys a polymer film peeled from a belt, the polymer film still containing a solvent. The drive roller has corrugation valleys and corrugation peaks formed on a peripheral surface along a circumferential direction of the drive roller. Each of the corrugation valleys and the corrugation peaks has a substantially semicircular cross section. The corrugation valleys and the corrugation peaks are disposed alternately in an axial direction of the drive roller. A pitch Pv between the corrugation valleys and a pitch Pm between the corrugation peaks are in the range of 0.01 to 2 mm, and a height Hv-m from a lowest point of the corrugation valley to a highest point of the corrugation peak is in the range of 0.01 to 1 mm. A curvature radius Rv of the corrugation valley and a curvature radius Rm of the corrugation peak are in the range of 0.1 to 0.5 mm.Type: GrantFiled: January 2, 2009Date of Patent: December 13, 2011Assignee: FUJIFILM CorporationInventors: Ryuhei Yoshida, Shinji Hikita, Hiroki Sato
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Patent number: 7597831Abstract: A dope producing apparatus is provided with a first feed line for sending polymer solution from a fourth tank to a solution casting apparatus. The first feed line is provided with a first orifice for adding dilute liquid to the polymer solution; a first inline mixer for inline-mixing the polymer solution and the dilute liquid to produce a mixture; a second orifice for adding matting liquid to the mixture; and a second inline mixer for mixing the mixture and the matting liquid to produce a first dope.Type: GrantFiled: September 28, 2007Date of Patent: October 6, 2009Assignee: FUJIFILM CorporationInventors: Hiromasa Tanaka, Ryuhei Yoshida, Yuji Suzuki
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Publication number: 20090174110Abstract: A solution casting apparatus includes a drive roller as a conveying means. The drive roller conveys a polymer film peeled from a belt, the polymer film still containing a solvent. The drive roller has corrugation valleys and corrugation peaks formed on a peripheral surface along a circumferential direction of the drive roller. Each of the corrugation valleys and the corrugation peaks has a substantially semicircular cross section. The corrugation valleys and the corrugation peaks are disposed alternately in an axial direction of the drive roller. A pitch Pv between the corrugation valleys and a pitch Pm between the corrugation peaks are in the range of 0.01 to 2 mm, and a height Hv-m from a lowest point of the corrugation valley to a highest point of the corrugation peak is in the range of 0.01 to 1 mm. A curvature radius Rv of the corrugation valley and a curvature radius Rm of the corrugation peak are in the range of 0.1 to 0.5 mm.Type: ApplicationFiled: January 2, 2009Publication date: July 9, 2009Applicant: FUJIFILM CorporationInventors: Ryuhei YOSHIDA, Shinji HIKITA, Hiroki SATO
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Publication number: 20080081118Abstract: A dope producing apparatus is provided with a first feed line for sending polymer solution from a fourth tank to a solution casting apparatus. The first feed line is provided with a first orifice for adding dilute liquid to the polymer solution; a first inline mixer for inline-mixing the polymer solution and the dilute liquid to produce a mixture; a second orifice for adding matting liquid to the mixture; and a second inline mixer for mixing the mixture and the matting liquid to produce a first dope.Type: ApplicationFiled: September 28, 2007Publication date: April 3, 2008Applicant: FUJIFILM CorporationInventors: Hiromasa Tanaka, Ryuhei Yoshida, Yuji Suzuki
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Patent number: 6806626Abstract: In a piezoelectric resonator, first and second resonance electrodes are provided on the upper surface and the lower surface of a piezoelectric member, inner electrode layers for leading the first and second resonance electrodes to the upper and lower surfaces are provided and extend to the upper and lower surfaces of the piezoelectric member, and connecting electrodes are provided on the upper and lower surfaces of the piezoelectric member, and are electrically connected to the corresponding resonance electrodes via the inner electrode layers.Type: GrantFiled: October 5, 2001Date of Patent: October 19, 2004Assignee: Murata Manufacturing Co., LLPInventors: Shungo Morinaga, Ryuhei Yoshida, Hideaki Kuroda
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Patent number: 6798116Abstract: A method for producing an energy trap piezoelectric resonator which operates in a thickness longitudinal vibration mode and which includes a piezoelectric member and first and second vibrating electrodes disposed on respective major surfaces of the piezoelectric member, involves the use of a piezoelectric material having an R value and an A value which are selected such that Qe=C/(R×A), where R and A are the average pore size in micrometers and the porosity in percent of the piezoelectric member, respectively. Here, Qe is a value at a frequency to be used and C is a constant that is determined by the piezoelectric material of the piezoelectric member. An energy trap, thickness longitudinal piezoelectric resonator produced by this method has a sufficiently high response to a vibration mode to be used, without any limitation on the type of piezoelectric material and size of the piezoelectric member and the frequency to be used.Type: GrantFiled: December 20, 2002Date of Patent: September 28, 2004Assignee: Murata Manufacturing Co., LTDInventors: Ryuhei Yoshida, Kenichi Sakai
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Publication number: 20030151330Abstract: A method for producing an energy trap piezoelectric resonator which operates in a thickness longitudinal vibration mode and which includes a piezoelectric member and first and second vibrating electrodes disposed on respective major surfaces of the piezoelectric member, involves the use of a piezoelectric material having an R value and an A value which are selected such that Qe=C/(R×A), where R and A are the average pore size in micrometers and the porosity in percent of the piezoelectric member, respectively. Here, Qe is a value at a frequency to be used and C is a constant that is determined by the piezoelectric material of the piezoelectric member. An energy trap, thickness longitudinal piezoelectric resonator produced by this method has a sufficiently high response to a vibration mode to be used, without any limitation on the type of piezoelectric material and size of the piezoelectric member and the frequency to be used.Type: ApplicationFiled: December 20, 2002Publication date: August 14, 2003Applicant: Murata Manufacturing Co., Ltd.Inventors: Ryuhei Yoshida, Kenichi Sakai
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Patent number: 6538361Abstract: A piezoelectric oscillator is constructed to prevent deterioration of frequency accuracy caused by external-capacitance variations to maintain a high degree of frequency accuracy. Additionally, an undesired short-circuit is prevented from occurring even when the height of the oscillator is reduced. In this oscillator, on an upper surface of a capacitor substrate only first and second external electrodes connected to a piezoelectric resonator are provided. The piezoelectric resonator connects to the external electrodes. A parallel capacitance section for loading capacitance in parallel to the piezoelectric resonator is connected between the first and second external electrodes. Additionally, load capacitance sections for interposing load capacitances are connected between the first external electrode and a third external electrode and between the second and third external electrodes. The parallel capacitance section and the pair of load capacitance sections are contained in the capacitor substrate.Type: GrantFiled: July 18, 2001Date of Patent: March 25, 2003Assignee: Murata Manufacturing Co., Ltd.Inventor: Ryuhei Yoshida
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Patent number: 6483401Abstract: A substrate of a case for packaging an electronic component includes a conductive cap bonded to a substrate to cover the electronic component and to tightly seal an enclosed space. The substrate has a substrate body layer, electrodes disposed on the substrate body layer, and a glass ceramic layer disposed on the substrate body layer so as to cover a portion of the electrodes.Type: GrantFiled: December 1, 2000Date of Patent: November 19, 2002Inventors: Ryuhei Yoshida, Tsuneo Amano
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Patent number: 6448690Abstract: An energy-trap type piezoelectric resonator utilizes a fundamental wave of a thickness shear vibration mode and includes resonance electrodes provided on both main surfaces of a substantially rectangular piezoelectric plate so as to face each other with the piezoelectric plate disposed therebetween. An energy trap vibration portion including a portion of the piezoelectric plate where the resonance electrodes overlap each other is asymmetrical with respect to the center in the longitudinal direction of the piezoelectric plate.Type: GrantFiled: December 28, 2000Date of Patent: September 10, 2002Assignee: Murata Manufacturing Co., Ltd.Inventors: Kazuhiro Sawai, Ryuhei Yoshida
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Publication number: 20020084724Abstract: In a piezoelectric resonator, first and second resonance electrodes are provided on the upper surface and the lower surface of a piezoelectric member, inner electrode layers for leading the first and second resonance electrodes to the upper and lower surfaces are provided and extend to the upper and lower surfaces of the piezoelectric member, and connecting electrodes are provided on the upper and lower surfaces of the piezoelectric member, and are electrically connected to the corresponding resonance electrodes via the inner electrode layers.Type: ApplicationFiled: October 5, 2001Publication date: July 4, 2002Applicant: Murata Manufacturing Co., Ltd.Inventors: Shungo Morinaga, Ryuhei Yoshida, Hideaki Kuroda
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Publication number: 20020057039Abstract: A piezoelectric oscillator is constructed to prevent deterioration of frequency accuracy caused by external-capacitance variations to maintain a high degree of frequency accuracy. Additionally, an undesired short-circuit is prevented from occurring even when the height of the oscillator is reduced. In this oscillator, on an upper surface of a capacitor substrate only first and second external electrodes connected to a piezoelectric resonator are provided. The piezoelectric resonator connects to the external electrodes. A parallel capacitance section for loading capacitance in parallel to the piezoelectric resonator is connected between the first and second external electrodes. Additionally, load capacitance sections for interposing load capacitances are connected between the first external electrode and a third external electrode and between the second and third external electrodes. The parallel capacitance section and the pair of load capacitance sections are contained in the capacitor substrate.Type: ApplicationFiled: July 18, 2001Publication date: May 16, 2002Applicant: Murata Manufacturing Co., LtdInventor: Ryuhei Yoshida
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Patent number: 6362561Abstract: An energy-trapping piezoelectric vibration device generates a thickness shear mode and includes an elongated piezoelectric element having first and second longitudinally opposed ends, top and bottom surfaces provided between the first and second ends such that the top and bottom surfaces oppose each other, and beveled surfaces disposed at a vicinity of the first and second ends such that the thickness of the piezoelectric element gradually decreases towards the first and second ends, respectively. First and second vibration electrodes are disposed on the top surface and the bottom surface of the piezoelectric element, respectively. The first and second vibration electrodes are located at an approximate middle portion of the piezoelectric element so as to oppose each other with the piezoelectric element disposed therebetween, to define opposing portions which constitute a vibrator.Type: GrantFiled: February 9, 2000Date of Patent: March 26, 2002Assignee: Murata Manufacturing Co., LTDInventors: Hideaki Kuroda, Ryuhei Yoshida
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Patent number: 6274964Abstract: A piezoelectric resonator adapted to generate a third harmonic wave of a thickness extensional vibration mode in which the fundamental wave is lead out of the vibrating portion and suppressed effectively. The piezoelectric resonator includes a vibrating portion with vibration electrodes opposing each other in the middle of a piezoelectric plate, lead-out electrodes electrically connected to the vibration electrodes, and a floating electrode disposed along the short side edge on at least one major surface of the piezoelectric plate or in the vicinity of the edge.Type: GrantFiled: November 12, 1998Date of Patent: August 14, 2001Assignee: Murata Manufacturing Co., Ltd.Inventors: Ryuhei Yoshida, Masaya Wajima, Kenichi Sakai
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Patent number: 6274968Abstract: An electronic component includes an electronic component element having a substantially rectangular plate disposed between upper and lower case substrates in the form of substantially rectangular plates such that the upper and lower case substrates and the electronic component element are stacked and define an integral unit. Assuming that the length of the shorter sides and the length of the longer sides of the electronic component element are a0 and b0, respectively, and that the length of the shorter sides and the length of the longer sides of the lower case substrate 3 are a1 and b1, respectively, the relationships a0<a1 and b0<b1 are satisfied.Type: GrantFiled: October 16, 1998Date of Patent: August 14, 2001Assignee: Murata Manufacturing Co., LTDInventors: Masaya Wajima, Ryuhei Yoshida
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Publication number: 20010009343Abstract: An energy-trap type piezoelectric resonator utilizes a fundamental wave of a thickness shear vibration mode and includes resonance electrodes provided on both main surfaces of a substantially rectangular piezoelectric plate so as to face each other with the piezoelectric plate disposed therebetween. An energy trap vibration portion including a portion of the piezoelectric plate where the resonance electrodes overlap each other is asymmetrical with respect to the center in the longitudinal direction of the piezoelectric plate.Type: ApplicationFiled: December 28, 2000Publication date: July 26, 2001Applicant: Murata Manufacturing Co., Ltd.Inventors: Kazuhiro Sawai, Ryuhei Yoshida
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Patent number: 6246013Abstract: A surface mounting structure is arranged to minimize a height dimension of an electronic component. A surface mount type electronic component is provided on the surface mounting structure. The surface mount type electronic component includes a piezoelectric component element including an insulating substrate, and a piezo-resonator mounted on a mounting surface of the insulating substrate. The piezoelectric component element is mounted on a printed circuit board, with the mounting surface being arranged to face a surface of the printed circuit board. A recess is formed in the printed circuit board and a portion of the piezoelectric component element is accommodated in the recess. A conductive adhesive is located on external connection electrodes provided on the mounting surface and is firmly attached to circuit patterns on the printed circuit board so that the piezoelectric component element is fixed to the printed circuit board.Type: GrantFiled: March 28, 2000Date of Patent: June 12, 2001Assignee: Murata Manufacturing Co., Ltd.Inventors: Ryuhei Yoshida, Tsuneo Amano
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Publication number: 20010002807Abstract: A substrate of a case for packaging an electronic component includes a conductive cap bonded to a substrate to cover the electronic component and to tightly seal an enclosed space. The substrate has a substrate body layer, electrodes disposed on the substrate body layer, and a glass ceramic layer disposed on the substrate body layer so as to cover a portion of the electrodes.Type: ApplicationFiled: December 1, 2000Publication date: June 7, 2001Applicant: Murata Manufacturing Co., Ltd.Inventors: Ryuhei Yoshida, Tsuneo Amano
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Patent number: 6215229Abstract: A capacitor-included, chip-type piezoelectric resonator allows minute and highly precise adjustment of electrostatic capacitance and the resonance frequency after production of the piezoelectric resonator by laminating a piezoelectric element and dielectric substrates. The resonator includes a piezoelectric substrate laminated with dielectric substrates and external electrodes disposed on the laminate body. A plurality of external electrodes are arranged to extend from the outer major surface of the first dielectric substrate to the outer major surface of the second dielectric substrate along first and second side surfaces disposed opposite to each other. On the outer major surface of the second dielectric substrate, at least one external electrode is divided into first and second electrode portions.Type: GrantFiled: May 12, 1999Date of Patent: April 10, 2001Assignee: Murata Manufacturing Co., Ltd.Inventors: Hideaki Kuroda, Masaya Wajima, Ryuhei Yoshida
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Patent number: 6163101Abstract: A piezoelectric resonator includes two sealing substrates, a seal portion, and an energy-trap type piezoelectric resonance element which is adapted to vibrate in a third harmonic of thickness extensional vibration. The piezoelectric resonance element includes a piezoelectric substrate and a pair of excitation electrodes, which are disposed on opposite major surfaces of the piezoelectric substrate. A portion of the piezoelectric substrate sandwiched by the excitation electrodes defines a vibrating portion. The sealing substrates each have a cavity formed therein and are attached onto the corresponding major surfaces of the piezoelectric substrate such that the cavities define a space for vibration. The seal portion is formed around the vibration space so as to damp leaking vibration. The vibrating portion is arranged such that the approximate center thereof is spaced from the approximate center of the vibration space as viewed along the major surfaces of the piezoelectric resonance element.Type: GrantFiled: April 26, 1999Date of Patent: December 19, 2000Assignee: Murata Manufacturing Co., Ltd.Inventors: Ryuhei Yoshida, Nobuhiro Kitajima, Kenichi Sakai