Patents by Inventor Toshihiko Unami
Toshihiko Unami 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: 11509283Abstract: A resonance device with improved precision of temperature control. The resonance device includes a platform; a resonator including a vibrator and one or more holding arms that connect the vibrator and the platform to each other such that a first groove is provided around the vibrator. Moreover, the resonance device includes a sensor with a measurement portion that measures temperature and a heater formed on the platform. A second groove is provided between the measurement portion and the heater.Type: GrantFiled: June 10, 2019Date of Patent: November 22, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Toshihiko Unami, Toshio Nishimura
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Patent number: 10715103Abstract: A resonator including a base; two or more vibration arms connected at ends thereof to a front end of the base and spaced apart from each other across a predetermined space and extending away from the base. Moreover, a connection member connects the vibration arms that bend in the same direction when an electric field is applied. The resonator inhibit occurrence of a spurious mode that otherwise occurs in a resonator that performs out-of-plane bending.Type: GrantFiled: March 16, 2018Date of Patent: July 14, 2020Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Wakana Hirota, Toshihiko Unami, Yoshihisa Inoue
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Publication number: 20190296712Abstract: A resonance device with improved precision of temperature control. The resonance device includes a platform; a resonator including a vibrator and one or more holding arms that connect the vibrator and the platform to each other such that a first groove is provided around the vibrator. Moreover, the resonance device includes a sensor with a measurement portion that measures temperature and a heater formed on the platform. A second groove is provided between the measurement portion and the heater.Type: ApplicationFiled: June 10, 2019Publication date: September 26, 2019Inventors: Toshihiko Unami, Toshio Nishimura
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Patent number: 10333490Abstract: A frequency adjustment method is provided in which a residual substance is unlikely to be generated, the frequency can be adjusted with high precision, and a decrease in strength is made small. A frequency adjustment method for a piezoelectric vibrator includes preparing the piezoelectric vibrator having a base portion, a vibration arm that includes a connection portion connected to the base portion as well as vibration arm main bodies extending from the connection portion and that is made of a single crystal, a lower electrode formed on the vibration arm, a piezoelectric thin film formed on the lower electrode, and an upper electrode formed on the piezoelectric thin film; and forming an alteration portion by irradiating the connection portion with a laser beam.Type: GrantFiled: June 14, 2016Date of Patent: June 25, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Toshihiko Unami, Eitaro Kameda
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Publication number: 20180205363Abstract: A resonator including a base; two or more vibration arms connected at ends thereof to a front end of the base and spaced apart from each other across a predetermined space and extending away from the base. Moreover, a connection member connects the vibration arms that bend in the same direction when an electric field is applied. The resonator inhibit occurrence of a spurious mode that otherwise occurs in a resonator that performs out-of-plane bending.Type: ApplicationFiled: March 16, 2018Publication date: July 19, 2018Inventors: Wakana Hirota, Toshihiko Unami, Yoshihisa Inoue
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Publication number: 20160294355Abstract: A frequency adjustment method is provided in which a residual substance is unlikely to be generated, the frequency can be adjusted with high precision, and a decrease in strength is made small. A frequency adjustment method for a piezoelectric vibrator includes preparing the piezoelectric vibrator having a base portion, a vibration arm that includes a connection portion connected to the base portion as well as vibration arm main bodies extending from the connection portion and that is made of a single crystal, a lower electrode formed on the vibration arm, a piezoelectric thin film formed on the lower electrode, and an upper electrode formed on the piezoelectric thin film; and forming an alteration portion by irradiating the connection portion with a laser beam.Type: ApplicationFiled: June 14, 2016Publication date: October 6, 2016Inventors: TOSHIHIKO UNAMI, Eitaro Kameda
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Patent number: 8513858Abstract: A vibrating device that includes a small number of components and that has a high vibration transmission efficiency is provided. The vibrating device is fixed to a fixing member. The vibrating device includes a single elastic plate and piezoelectric vibrating plates. The elastic plate includes a fixing portion, a vibrating portion, and a connecting portion. The fixing portion is attached to the fixing member. The vibrating portion is arranged to be substantially parallel to and spaced from a fixing surface at which the fixing portion is fixed to the fixing member. The connecting portion connects an end part of the fixing portion and an end part of the vibrating portion to each other. The piezoelectric vibrating plates are provided on surfaces of the vibrating portion.Type: GrantFiled: November 18, 2010Date of Patent: August 20, 2013Assignee: Murata Manufacturing Co., Ltd.Inventors: Kenji Kagayama, Toshihiko Unami
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Patent number: 8247954Abstract: A vibratory device includes an elastic plate and a piezoelectric diaphragm. The elastic plate includes a fixable portion, a vibratory portion, and a connection portion. The fixable portion is fixed to a fixation member. The vibratory portion is spaced away from a fixable surface of the fixable portion that faces the fixation member and arranged substantially in parallel with the fixable surface. The connection portion connects a first end of the fixable portion in its planar direction and a first end of the vibratory portion in its planar direction. The piezoelectric diaphragm is disposed on a surface of the vibratory portion that is adjacent to the fixable portion. In a direction N normal to the surface of the vibratory portion adjacent to the fixable portion, at least part of the second piezoelectric diaphragm does not overlap the fixable portion.Type: GrantFiled: February 25, 2011Date of Patent: August 21, 2012Assignee: Murata Manufacturing Co., Ltd.Inventors: Kenji Kagayama, Toshihiko Unami
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Publication number: 20110140574Abstract: A vibratory device includes an elastic plate and a piezoelectric diaphragm. The elastic plate includes a fixable portion, a vibratory portion, and a connection portion. The fixable portion is fixed to a fixation member. The vibratory portion is spaced away from a fixable surface of the fixable portion that faces the fixation member and arranged substantially in parallel with the fixable surface. The connection portion connects a first end of the fixable portion in its planar direction and a first end of the vibratory portion in its planar direction. The piezoelectric diaphragm is disposed on a surface of the vibratory portion that is adjacent to the fixable portion. In a direction N normal to the surface of the vibratory portion adjacent to the fixable portion, at least part of the second piezoelectric diaphragm does not overlap the fixable portion.Type: ApplicationFiled: February 25, 2011Publication date: June 16, 2011Inventors: Kenji Kagayama, Toshihiko Unami
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Publication number: 20110095649Abstract: A vibrating device that includes a small number of components and that has a high vibration transmission efficiency is provided. The vibrating device is fixed to a fixing member. The vibrating device includes a single elastic plate and piezoelectric vibrating plates. The elastic plate includes a fixing portion, a vibrating portion, and a connecting portion. The fixing portion is attached to the fixing member. The vibrating portion is arranged to be substantially parallel to and spaced from a fixing surface at which the fixing portion is fixed to the fixing member. The connecting portion connects an end part of the fixing portion and an end part of the vibrating portion to each other. The piezoelectric vibrating plates are provided on surfaces of the vibrating portion.Type: ApplicationFiled: November 18, 2010Publication date: April 28, 2011Inventors: Kenji Kagayama, Toshihiko Unami
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Patent number: 6903498Abstract: A lamination type piezoelectric device includes a piezoelectric member that is longer in one direction, and a plurality of internal electrodes extending substantially perpendicularly to the longitudinal direction and arranged so as to be opposed to each other via piezoelectric layers, respectively. Bending vibration in which the piezoelectric member is bent substantially perpendicularly to the longitudinal direction thereof is excited using a piezoelectric longitudinal effect.Type: GrantFiled: August 12, 2002Date of Patent: June 7, 2005Assignee: Murata Manufacturing Co., Ltd.Inventors: Toshihiko Unami, Jiro Inoue
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Publication number: 20030042820Abstract: A lamination type piezoelectric device includes a piezoelectric member that is longer in one direction, and a plurality of internal electrodes extending substantially perpendicularly to the longitudinal direction and arranged so as to be opposed to each other via piezoelectric layers, respectively. Bending vibration in which the piezoelectric member is bent substantially perpendicularly to the longitudinal direction thereof is excited using a piezoelectric longitudinal effect.Type: ApplicationFiled: August 12, 2002Publication date: March 6, 2003Applicant: Murata Manufacturing Co., Ltd.Inventors: Toshihiko Unami, Jiro Inoue
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Patent number: 6429670Abstract: A piezoelectric sensor has a piezoelectric element having a specific axis of sensitivity and a package for the piezoelectric element. The package has a rectangular parallelopiped configuration with opposite longitudinal end surfaces having a height-to-width ratio of about 1:1. External lead electrodes are formed to cover at least the longitudinal end surfaces. A method and apparatus for detecting if the sensor is disposed in the proper posture is also disclosed.Type: GrantFiled: December 22, 2000Date of Patent: August 6, 2002Assignee: Murata Manufacturing Co., Ltd.Inventors: Jun Tabota, Mitsugu Ogiura, Toshihiko Unami
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Patent number: 6353325Abstract: A piezoelectric sensor has a piezoelectric element having a specific axis of sensitivity and a package for the piezoelectric element. The package has a rectangular parallelopiped configuration with opposite longitudinal end surfaces having a height-to-width ratio of about 1:1. External lead electrodes are formed to cover at least the longitudinal end surfaces. A method and apparatus for detecting if the sensor is disposed in the proper posture is also disclosed.Type: GrantFiled: October 13, 1998Date of Patent: March 5, 2002Assignee: Murata Manufacturing Co., Ltd.Inventors: Jun Tabota, Mitsugu Ogiura, Toshihiko Unami
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Publication number: 20010015103Abstract: A piezoelectric sensor has a piezoelectric element having a specific axis of sensitivity and a package for the piezoelectric element. The package has a rectangular parallelopiped configuration with opposite longitudinal end surfaces having a height-to-width ratio of about 1:1. External lead electrodes are formed to cover at least the longitudinal end surfaces. A method and apparatus for detecting if the sensor is disposed in the proper posture is also disclosed.Type: ApplicationFiled: December 22, 2000Publication date: August 23, 2001Applicant: Murata Manufacturing Co., Ltd.Inventors: Jun Tabota, Mitsugu Ogiura, Toshihiko Unami
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Patent number: 6233801Abstract: A method of making an acceleration detecting element includes preparing two green sheets having a rectangular plate shape and being made of piezoelectric ceramic; applying a conductive paste on a center location and locations along the longitudinal direction of the first face of the first one of the green sheets thereby forming respective inner electrode patterns; laminating the first face of the second of the green sheets on the first face of the first one of the green sheets on which the inner electrode patterns have been formed; baking to simultaneously form inner electrodes and piezoelectric ceramic bodies; forming signal output electrodes by a baking treatment after applying the conductive paste on the main second surfaces of the piezoelectric ceramic bodies; and polarizing center portions and end portions of the piezoelectric ceramic bodies by using the respective signal output electrodes and the respective inner electrodes.Type: GrantFiled: March 5, 1998Date of Patent: May 22, 2001Assignee: Murata Manufacturing Co., Ltd.Inventors: Jun Tabota, Toshihiko Unami, Jiro Inoue
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Patent number: 6150902Abstract: A ladder filter includes an insulation substrate and a plurality of pattern electrodes provided on one major surface of the insulation substrate. A piezoelectric resonator which is a first series resonator, a piezoelectric resonator which is a first parallel resonator, a piezoelectric resonator which is a second parallel resonator and a piezoelectric resonator which is a second series resonator are arranged on the substrate in this order. External electrodes of these piezoelectric resonators are respectively bonded to the lands via a conductive bonding agent and are connected to pattern electrodes, respectively.Type: GrantFiled: September 28, 1998Date of Patent: November 21, 2000Assignee: Murata Manufacturing Co, LtdInventor: Toshihiko Unami
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Patent number: 6144141Abstract: A piezoelectric resonator has a base member including laminated piezoelectric layers and internal electrodes. The base member is polarized in different directions at both sides of each internal electrode. The internal electrodes are alternately covered by insulating film on opposing side surfaces of the base member. External electrodes are formed on the opposing side surfaces of the base member and the internal electrodes are connected thereto, respectively.Type: GrantFiled: April 2, 1997Date of Patent: November 7, 2000Assignee: Murata Manufacturing Co., LTDInventors: Toshihiko Unami, Jiro Inoue
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Patent number: 6114800Abstract: A piezoelectric component includes a substrate on which a piezoelectric resonator is mounted with supporting members interposed therebetween. The substrate is covered by a cap which is arranged to cover the piezoelectric resonator. A rubber-like elastic material such as a silicone resin is injected through a hole of the cap to cover the periphery of the piezoelectric resonator. Preferably, the Young's modulus of the rubber-like elastic material is not larger than about 12 kgf/cm.sup.2.Type: GrantFiled: September 25, 1998Date of Patent: September 5, 2000Assignee: Murata Manufacturing Co., LtdInventors: Toshihiko Unami, Tetsuo Takeshima, Makoto Irie
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Patent number: 6111480Abstract: A piezoelectric resonator having a small spurious resonance and a large difference .increment.F between the resonant frequency and the antiresonant frequency is constructed that a resonant frequency or antiresonant frequency can be easily and accurately adjusted to a low frequency. The piezoelectric resonator has a base member which includes a plurality of laminated piezoelectric layers and a plurality of inner electrodes disposed substantially perpendicularly to the longitudinal direction of the base member. The plurality of piezoelectric layers are polarized in the longitudinal direction of the base member. A first external electrode and a second external electrode are located on a surface of the base member and connected to the plurality of electrodes. The resonant frequency of the piezoelectric resonator is adjusted by cutting an intermediate portion in the longitudinal direction of the base member.Type: GrantFiled: July 6, 1998Date of Patent: August 29, 2000Assignee: Murata Manfacturing Co., Ltd.Inventors: Kiyoshi Iyama, Toshihiko Unami