Patents by Inventor Takumi ARIJI
Takumi ARIJI 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: 11218131Abstract: A single-chamber-type temperature-sensor-provided crystal unit includes: a single chamber; and a quartz-crystal vibrating piece and a temperature sensor, provided in the single chamber. The quartz-crystal vibrating piece has a square planar shape. The quartz-crystal vibrating piece is secured in the single chamber at two securing portions via conductive members. The two securing portions are in proximities of both ends of a first side of the quartz-crystal vibrating piece. The temperature sensor has a rectangular parallelepiped shape. The temperature sensor is disposed such that a longitudinal surface of the temperature sensor is parallel to a line segment Y and the temperature sensor is close to a side of the two securing portions within the single chamber, when a line segment connecting the two securing portions is defined as the line segment Y.Type: GrantFiled: December 25, 2018Date of Patent: January 4, 2022Assignee: NIHON DEMPA KOGYO CO., LTD.Inventors: Takumi Ariji, Akihiro Sakanashi, Takashi Asamizu, Yoshihiro Takaki
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Publication number: 20190199318Abstract: A single-chamber-type temperature-sensor-provided crystal unit includes: a single chamber; and a quartz-crystal vibrating piece and a temperature sensor, provided in the single chamber. The quartz-crystal vibrating piece has a square planar shape. The quartz-crystal vibrating piece is secured in the single chamber at two securing portions via conductive members. The two securing portions are in proximities of both ends of a first side of the quartz-crystal vibrating piece. The temperature sensor has a rectangular parallelepiped shape. The temperature sensor is disposed such that a longitudinal surface of the temperature sensor is parallel to a line segment Y and the temperature sensor is close to a side of the two securing portions within the single chamber, when a line segment connecting the two securing portions is defined as the line segment Y.Type: ApplicationFiled: December 25, 2018Publication date: June 27, 2019Applicant: NIHON DEMPA KOGYO CO., LTD.Inventors: Takumi ARIJI, Akihiro SAKANASHI, Takashi ASAMIZU, Yoshihiro TAKAKI
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Patent number: 9735756Abstract: A piezoelectric device includes a piezoelectric vibrating piece and a base. The piezoelectric vibrating piece includes an excitation portion, a framing portion, a connecting portion, excitation electrodes, and extraction electrodes. The base includes a mounting terminal, a cutout portion formed on a side surface, and a cutout-portion electrode formed in the cutout portion. The cutout-portion electrode connects the mounting terminal to the extraction electrode. The extraction electrode includes a cutout-portion region connected to the cutout-portion electrode, an excitation-electrode connecting region connected to the excitation electrode, and an erosion preventing region disposed between the cutout-portion region and the excitation-electrode connecting region to prevent erosion by solder.Type: GrantFiled: November 27, 2014Date of Patent: August 15, 2017Assignee: NIHON DEMPA KOGYO CO., LTD.Inventors: Takumi Ariji, Kunio Morita, Tomoyuki Ochiai
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Patent number: 9362885Abstract: A piezoelectric device includes a piezoelectric vibrating piece, a lid portion, and a base portion. The piezoelectric vibrating piece includes: a vibrating portion; a framing portion surrounding the vibrating portion; an excitation electrode in the vibrating portion; and an extraction electrode electrically connected to the excitation electrode in the framing portion. The lid portion is bonded to a front surface of the piezoelectric vibrating piece via a bonding material. The base portion includes an external electrode bonded to a back surface of the piezoelectric vibrating piece via a bonding material and electrically connected to the extraction electrode. The excitation electrode and the extraction electrode each include: a foundation film formed of metal to be rendered passive; and a first metal film and a second metal film laminated to the foundation film. The foundation film has a film thickness of 1.0 nm to 8.0 nm.Type: GrantFiled: November 1, 2013Date of Patent: June 7, 2016Assignee: NIHON DEMPA KOGYO CO., LTD.Inventors: Takumi Ariji, Hiromasa Nakatake, Takehiro Takahashi
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Patent number: 9106200Abstract: A piezoelectric vibrating device and a piezoelectric vibrating piece including an excitation unit, a framing portion and a connecting portion are provided. The excitation unit includes a first side extending in a first direction and a second side extending in a second direction. The connecting portion has a thickness of a first thickness in a third direction perpendicular to the first direction and the second direction. The excitation unit includes a first region, a second region and a third region. The pair of excitation electrodes are disposed on the first region. The second region with the first thickness is directly connected to the connecting portion. The third region is disposed between the first region and the second region. The third region has a thickness in the third direction of a second thickness. The second region has a thickness in the third direction that is thicker than the second thickness.Type: GrantFiled: July 1, 2012Date of Patent: August 11, 2015Assignee: NIHON DEMPA KOGYO CO., LTD.Inventors: Takehiro Takahashi, Shuichi Mizusawa, Masakazu Harada, Hiroaki Yamada, Takumi Ariji
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Publication number: 20150155469Abstract: A piezoelectric device includes a piezoelectric vibrating piece and a base. The piezoelectric vibrating piece includes an excitation portion, a framing portion, a connecting portion, excitation electrodes, and extraction electrodes. The base includes a mounting terminal, a cutout portion formed on a side surface, and a cutout-portion electrode formed in the cutout portion. The cutout-portion electrode connects the mounting terminal to the extraction electrode. The extraction electrode includes a cutout-portion region connected to the cutout-portion electrode, an excitation-electrode connecting region connected to the excitation electrode, and an erosion preventing region disposed between the cutout-portion region and the excitation-electrode connecting region to prevent erosion by solder.Type: ApplicationFiled: November 27, 2014Publication date: June 4, 2015Inventors: TAKUMI ARIJI, KUNIO MORITA, TOMOYUKI OCHIAI
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Patent number: 9041271Abstract: A crystal device is provided, in which a peeling of a bonding material is prevented by using the bonding material having a thermal expansion coefficient which is between the coefficients in a first direction and a second direction of a bonding surface of a crystal element. A crystal device includes a rectangular crystal element formed with a crystal material that includes an excitation part and a frame surrounding the excitation part. The device further includes a rectangular base bonded to a principal surface of the frame, and a lid bonded to another principal surface of the frame; and the frame, the base and the lid have edges respectively along a first direction and a second direction intersecting with the first direction. The bonding material is applied having a thermal expansion coefficient that is between the coefficients in the first direction and second direction of the crystal element.Type: GrantFiled: June 7, 2012Date of Patent: May 26, 2015Assignee: NIHON DEMPA KOGYO CO., LTDInventors: Masakazu Harada, Takumi Ariji, Takehiro Takahashi
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Patent number: 9035538Abstract: A piezoelectric vibrating piece includes an excitation unit in a rectangular shape, a framing portion, a connecting portion, and a protrusion. The excitation unit includes a pair of excitation electrodes on the pair of principal surfaces, a first side that extends in a first direction, and a second side that extends in a second direction. The second side is longer than the first side. The second direction is perpendicular to the first direction. The connecting portion connects the first side of the excitation unit to the framing portion. The connecting portion is thinner than the framing portion. The protrusion protrudes in the thickness direction in at least one of the connecting portion and a region between the connecting portion and the excitation electrode. The length of the protrusion in the first direction is equal to or longer than a length of the connecting portion in the first direction.Type: GrantFiled: October 30, 2012Date of Patent: May 19, 2015Assignee: NIHON DEMPA KOGYO CO., LTD.Inventors: Takumi Ariji, Takehiro Takahashi
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Patent number: 9018825Abstract: A piezoelectric device, in which one of a first plate, a second plate, and an adhesive agent is colored for confirming a bonding status of the adhesive agent, and a manufacturing method thereof, are provided. A piezoelectric device includes a piezoelectric vibrating piece that vibrates by applying a voltage; a first plate and a second plate formed of glass and seal the piezoelectric vibrating piece; and an adhesive agent which bonds the first plate with the second plate, wherein one of the first plate, the second plate, and the adhesive agent is colored.Type: GrantFiled: March 29, 2012Date of Patent: April 28, 2015Assignee: Nihon Dempa Kogyo Co., Ltd.Inventors: Takumi Ariji, Kunio Morita
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Patent number: 8946975Abstract: A piezoelectric vibrating piece includes an excitation unit in a rectangular shape, a framing portion, and a connecting portion. The excitation unit includes two principal surfaces, a pair of excitation electrodes on the principal surfaces, a first side extending in a first direction, and a second side extending in a second direction. The second side is longer than the first side, and is perpendicular to the first direction. The framing portion surrounds the excitation unit. The connecting portion connects the excitation unit to the framing portion. The connecting portion has a third side which is connected to the first side and extends in the first direction and a fourth side which is connected to the framing portion and extends in the first direction. A thickness of the connecting portion is thinner than that of the framing portion. The third side has a different length from that of the fourth side.Type: GrantFiled: October 28, 2012Date of Patent: February 3, 2015Assignee: Nihon Dempa Kogyo Co., Ltd.Inventors: Takumi Ariji, Takehiro Takahashi
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Publication number: 20140252919Abstract: A piezoelectric device includes a piezoelectric vibrating piece, a lid portion, and a base portion. The piezoelectric vibrating piece includes a vibrating portion, a framing portion surrounding the vibrating portion, an excitation electrode on the vibrating portion, and an extraction electrode on the framing portion. The extraction electrode is electrically connected to the excitation electrode. The lid portion is bonded to a front surface of the piezoelectric vibrating piece. The base portion is bonded to a back surface of the piezoelectric vibrating piece. The base portion includes an external electrode electrically connected to the extraction electrodes. The framing portion includes a metallic layer that allows a passivation. The metallic layer is disposed at an outer peripheral edge portion corresponding to the extraction electrode on at least one of a front surface and a back surface.Type: ApplicationFiled: February 25, 2014Publication date: September 11, 2014Applicant: NIHON DEMPA KOGYO CO., LTD.Inventors: TAKUMI ARIJI, TAKEHIRO TAKAHASHI, SHINICHI ASANO, TAICHI HAYASAKA, HIROMASA NAKATAKE, SHUICHI MIZUSAWA
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Publication number: 20140139073Abstract: A piezoelectric device includes a piezoelectric vibrating piece, a lid portion, and a base portion. The piezoelectric vibrating piece includes: a vibrating portion; a framing portion surrounding the vibrating portion; an excitation electrode in the vibrating portion; and an extraction electrode electrically connected to the excitation electrode in the framing portion. The lid portion is bonded to a front surface of the piezoelectric vibrating piece via a bonding material. The base portion includes an external electrode bonded to a back surface of the piezoelectric vibrating piece via a bonding material and electrically connected to the extraction electrode. The excitation electrode and the extraction electrode each include: a foundation film formed of metal to be rendered passive; and a first metal film and a second metal film laminated to the foundation film. The foundation film has a film thickness of 1.0 nm to 8.0 nm.Type: ApplicationFiled: November 1, 2013Publication date: May 22, 2014Applicant: NIHON DEMPA KOGYO CO., LTD.Inventors: TAKUMI ARIJI, HIROMASA NAKATAKE, TAKEHIRO TAKAHASHI
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Patent number: 8686803Abstract: A crystal device includes; a base, a framed crystal vibrating blank in which a mesa section is formed on an upper face end bonded to a seal path on an upper surface of the base via a low melting point glass layer or a resin adhesive layer, and a lid bonded to a seal path on an upper surface of the framed crystal vibrating blank via a low melting point glass layer or a resin adhesive layer. A pillow made of low melting point glass or a resin adhesive that suppresses vibration amplitude at the time of a drop impact of the framed crystal vibrating blank is formed on a rear surface of the lid simultaneously with the low melting point glass layer or the resin adhesive layer.Type: GrantFiled: March 28, 2012Date of Patent: April 1, 2014Assignee: Nihon Dempa Kogyo Co., Ltd.Inventors: Takumi Ariji, Masakazu Harada, Takehiro Takahashi
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Publication number: 20140042874Abstract: A piezoelectric vibrating piece includes a vibrator, a framing portion, a connecting portion, and an extraction electrode. The vibrator includes excitation electrodes formed on both principal surfaces. The framing portion includes an inner peripheral side facing the vibrator and an outer peripheral side on an opposite side of the inner peripheral side. The framing portion has a predetermined width from the inner peripheral side to the outer peripheral side. The connecting portion connects the vibrator and the framing portion. The extraction electrode is extracted from the excitation electrode to the framing portion via the connecting portion. The extraction electrode contacts the inner peripheral side and the outer peripheral side of the framing portion. The extraction electrode includes an end side that connects the inner peripheral side and the outer peripheral side of the extraction electrode. All of the end side is longer than the predetermined width.Type: ApplicationFiled: July 22, 2013Publication date: February 13, 2014Applicant: NIHON DEMPA KOGYO CO., LTD.Inventors: TAKEHIRO TAKAHASHI, SHUICHI MIZUSAWA, TAKUMI ARIJI
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Publication number: 20130020911Abstract: A piezoelectric vibrating device and a piezoelectric vibrating piece including an excitation unit, a framing portion and a connecting portion are provided. The excitation unit includes a first side extending in a first direction and a second side extending in a second direction. The connecting portion has a thickness of a first thickness in a third direction perpendicular to the first direction and the second direction. The excitation unit includes a first region, a second region and a third region. The pair of excitation electrodes are disposed on the first region. The second region with the first thickness is directly connected to the connecting portion. The third region is disposed between the first region and the second region. The third region has a thickness in the third direction of a second thickness. The second region has a thickness in the third direction that is thicker than the second thickness.Type: ApplicationFiled: July 1, 2012Publication date: January 24, 2013Applicant: NIHON DEMPA KOGYO CO., LTD.Inventors: Takehiro Takahashi, Shuichi Mizusawa, Masakazu Harada, Hiroaki Yamada, Takumi Ariji
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Publication number: 20120313488Abstract: A crystal device is provided, in which a peeling of a bonding material is prevented by using the bonding material having a thermal expansion coefficient which is between the coefficients in a first direction and a second direction of a bonding surface of a crystal element. A crystal device includes a rectangular crystal element formed with a crystal material that includes an excitation part and a frame surrounding the excitation part. The device further includes a rectangular base bonded to a principal surface of the frame, and a lid bonded to another principal surface of the frame; and the frame, the base and the lid have edges respectively along a first direction and a second direction intersecting with the first direction. The bonding material is applied having a thermal expansion coefficient that is between the coefficients in the first direction and second direction of the crystal element.Type: ApplicationFiled: June 7, 2012Publication date: December 13, 2012Applicant: NIHON DEMPA KOGYO CO., LTD.Inventors: MASAKAZU HARADA, TAKUMI ARIJI, TAKEHIRO TAKAHASHI
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Publication number: 20120249255Abstract: A crystal device includes; a base, a framed crystal vibrating blank in which a mesa section is formed on an upper face end bonded to a seal path on an upper surface of the base via a low melting point glass layer or a resin adhesive layer, and a lid bonded to a seal path on an upper surface of the framed crystal vibrating blank via a low melting point glass layer or a resin adhesive layer. A pillow made of low melting point glass or a resin adhesive that suppresses vibration amplitude at the time of a drop impact of the framed crystal vibrating blank is formed on a rear surface of the lid simultaneously with the low melting point glass layer or the resin adhesive layer.Type: ApplicationFiled: March 28, 2012Publication date: October 4, 2012Applicant: NIHON DEMPA KOGYO CO., LTD.Inventors: TAKUMI ARIJI, MASAKAZU HARADA, TAKEHIRO TAKAHASHI
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Publication number: 20120248940Abstract: A piezoelectric device, in which one of a first plate, a second plate, and an adhesive agent is colored for confirming a bonding status of the adhesive agent, and a manufacturing method thereof, are provided. A piezoelectric device includes a piezoelectric vibrating piece that vibrates by applying a voltage; a first plate and a second plate formed of glass and seal the piezoelectric vibrating piece; and an adhesive agent which bonds the first plate with the second plate, wherein one of the first plate, the second plate, and the adhesive agent is colored.Type: ApplicationFiled: March 29, 2012Publication date: October 4, 2012Applicant: NIHON DEMPA KOGYO CO., LTD.Inventors: TAKUMI ARIJI, KUNIO MORITA
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Publication number: 20090102315Abstract: A quartz crystal device includes: a container; a crystal blank hermetically encapsulated in the container; and at least two outside terminals provided on an outer bottom surface of the container and used to surface-mount the quartz crystal device on a wiring board. Each outside terminal has a two-layer structure with a first layer provided on the outer bottom surface and a second layer provided on the first layer and having a flat surface. The second layer has a smaller plane shape than the first layer and is formed on a central part of the first layer at a distance from the perimeter of the first layer.Type: ApplicationFiled: October 15, 2008Publication date: April 23, 2009Applicant: NIHON DEMPA KOGYO CO., LTD.Inventors: Kenichi KOMADA, Takumi ARIJI, Hiroyuki MURAKOSHI