Patents by Inventor Tomoya Komatsu
Tomoya Komatsu 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: 9246533Abstract: An electronic device includes a main circuit connected between an input terminal and an output terminal, and an auxiliary circuit connected in parallel to the main circuit between the input terminal and the output terminal. The main circuit includes a filter having a first passband and a stopband. The auxiliary circuit has a passing characteristic that allows a signal having a frequency in a certain frequency band inside the stopband to pass through the auxiliary circuit. The main circuit is configured to output a main signal in response to an input signal. The auxiliary circuit is configured to output an auxiliary signal in response to the input signal. The main signal and the auxiliary signal contain phase components opposite to each other in the certain frequency band inside the stopband. This electronic device has an attenuation amount in the stopband.Type: GrantFiled: October 10, 2013Date of Patent: January 26, 2016Assignee: SKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO., LTD.Inventors: Joji Fujiwara, Toru Jibu, Tomoya Komatsu, Hiroyuki Nakamura, Tetsuya Tsurunari, Kazunori Nishimura
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Publication number: 20150333731Abstract: An elastic wave device includes an interdigital transducer (IDT) electrode in contact with a piezoelectric substrate having a bus bar electrode region including one of a first bus bar electrode and a second bus bar electrode of the IDT electrode, an alternately disposed region where first electrode fingers are alternately disposed with second electrode fingers of the IDT electrode, and an intermediate region including one of the first electrode fingers and the second electrode fingers. A dielectric film is formed in at least part of the intermediate region and in contact with an upper surface of the IDT electrode. The dielectric film includes a medium in which an acoustic velocity of a transverse wave propagating in the dielectric film is lower than an acoustic velocity of a main elastic wave of the alternately disposed region. The dielectric film is not formed in the alternately disposed region.Type: ApplicationFiled: July 27, 2015Publication date: November 19, 2015Inventors: Tomoya Komatsu, Hiroyuki Nakamura, Tetsuya Tsurunari, Joji Fujiwara, Hidekazu Nakanishi
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Patent number: 9166558Abstract: Assigning multiple functions to a PA and simplifying wiring and circuits are achieved without using switches in a transmission-and-reception system using a high-frequency filter that supports multiple bands. Provided is a high-frequency filter including: first and second transmission filters; first and second reception filters; and a matching circuit connected to input sides of the first and second transmission filters. Transmission signals are inputted to the first and second transmission filters via the matching circuit. A resonator forming the matching circuit is serially connected to an input side of, among the first and second transmission filters, a filter whose passband is a higher frequency band.Type: GrantFiled: October 24, 2012Date of Patent: October 20, 2015Assignee: SKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO., LTD.Inventors: Joji Fujiwara, Tetsuya Tsurunari, Tomoya Komatsu, Hiroyuki Nakamura
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Patent number: 9136458Abstract: An elastic wave element includes a piezoelectric substrate, an IDT electrode, and a first dielectric film. The IDT electrode includes a first bus bar electrode, a second bus bar electrode, first electrode fingers, and second electrode fingers. The piezoelectric substrate includes a bus bar electrode region, an alternately disposed region, and an intermediate region. The first dielectric film is formed in at least a part of the intermediate region, and formed of a medium in which acoustic velocity of a transverse wave propagating in the first dielectric film is lower than acoustic velocity of a main elastic wave in the alternately disposed region.Type: GrantFiled: March 5, 2012Date of Patent: September 15, 2015Assignee: SKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO., LTD.Inventors: Tomoya Komatsu, Hiroyuki Nakamura, Tetsuya Tsurunari, Joji Fujiwara, Hidekazu Nakanishi
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Patent number: 9048813Abstract: An acoustic wave device includes a piezoelectric substrate, a comb-shaped electrode formed on the piezoelectric substrate and configured to excite a Rayleigh wave as a main acoustic wave, a first dielectric film formed above the piezoelectric substrate to cover the comb-shaped electrode, and a second dielectric film having a portion provided between electrode fingers of the comb-shaped electrode and a portion provided above the comb-shaped electrode. The portion provided between the electrode fingers is provided between the piezoelectric substrate and the first dielectric film. The portion provided above the comb-shaped electrode is provided between the comb-shaped electrode and the first dielectric film. A speed of a transverse wave propagating through the first dielectric film is lower than a speed of the Rayleigh wave excited by the comb-shaped electrode.Type: GrantFiled: February 24, 2014Date of Patent: June 2, 2015Assignee: SKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO., LTDInventors: Tomohiro Iwasaki, Hiroyuki Nakamura, Tomoya Komatsu
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Patent number: 9035725Abstract: An acoustic wave device includes a piezoelectric substrate, an interdigital transducer (IDT) electrode provided on an upper surface of the piezoelectric substrate, a first dielectric film covering the upper surface of the piezoelectric substrate to cover the IDT electrode, and a second dielectric film covering an upper surface of the first dielectric film. The second dielectric film includes a thin portion positioned in a tip region of electrode fingers of the IDT electrode and a thick portion which is positioned in a middle region of the IDT electrode and is thicker than the thin portion. The acoustic wave device suppresses spurious emission and has superior passband characteristics.Type: GrantFiled: February 19, 2014Date of Patent: May 19, 2015Assignee: PANASONIC CORPORATIONInventors: Tomoya Komatsu, Tomohiro Iwasaki, Hiroyuki Nakamura, Masahiro Yasumi, Kazunori Nishimura
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Publication number: 20150005866Abstract: A balloon catheter and a stent delivery system are disclosed, which includes a shaft portion of which an axially orthogonal cross section of an outer peripheral surface has a polygonal shape, and a balloon which is foldable on the outer peripheral surface of the shaft portion and in which turned-back portions are formed when folded. Portions formed to linearly extend along an axial direction in the turned-back portions are respectively positioned on sides of the polygonal shape. A stent can be arranged on an outer periphery of a balloon in the balloon catheter and expands in response to dilation of the balloon.Type: ApplicationFiled: September 15, 2014Publication date: January 1, 2015Applicant: TERUMO KABUSHIKI KAISHAInventors: Tomoya Komatsu, Noboru SAITO
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Publication number: 20140285287Abstract: An acoustic wave device includes a piezoelectric substrate, an interdigital transducer (IDT) electrode provided on an upper surface of the piezoelectric substrate, a first dielectric film covering the upper surface of the piezoelectric substrate to cover the IDT electrode, and a second dielectric film covering an upper surface of the first dielectric film. The second dielectric film includes a thin portion positioned in a tip region of electrode fingers of the IDT electrode and a thick portion which is positioned in a middle region of the IDT electrode and is thicker than the thin portion. The acoustic wave device suppresses spurious emission and has superior passband characteristics.Type: ApplicationFiled: February 19, 2014Publication date: September 25, 2014Applicant: Panasonic CorporationInventors: TOMOYA KOMATSU, TOMOHIRO IWASAKI, HIROYUKI NAKAMURA, MASAHIRO YASUMI, KAZUNORI NISHIMURA
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Publication number: 20140225680Abstract: Assigning multiple functions to a PA and simplifying wiring and circuits are achieved without using switches in a transmission-and-reception system using a high-frequency filter that supports multiple bands. Provided is a high-frequency filter including: first and second transmission filters; first and second reception filters; and a matching circuit connected to input sides of the first and second transmission filters. Transmission signals are inputted to the first and second transmission filters via the matching circuit. A resonator forming the matching circuit is serially connected to an input side of, among the first and second transmission filters, a filter whose passband is a higher frequency band.Type: ApplicationFiled: October 24, 2012Publication date: August 14, 2014Applicant: PANASONIC CORPORATIONInventors: Joji Fujiwara, Tetsuya Tsurunari, Tomoya Komatsu, Hiroyuki Nakamura
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Publication number: 20140218129Abstract: In a ladder-type elastic wave filter, a resonance frequency of a second parallel resonator is higher than that of a series resonator and lower than an antiresonance frequency of a series resonator. With this configuration, an attenuation pole is formed by the second parallel resonator at a frequency region lower than an attenuation pole formed by the series resonator in a frequency region higher than the passband of the ladder-type elastic wave filter.Type: ApplicationFiled: April 8, 2014Publication date: August 7, 2014Applicant: PANASONIC CORPORATIONInventors: Joji FUJIWARA, Tetsuya TSURUNARI, Tomoya KOMATSU, Hiroyuki NAKAMURA
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Publication number: 20140167881Abstract: An acoustic wave device includes a piezoelectric substrate, a comb-shaped electrode formed on the piezoelectric substrate and configured to excite a Rayleigh wave as a main acoustic wave, a first dielectric film formed above the piezoelectric substrate to cover the comb-shaped electrode, and a second dielectric film having a portion provided between electrode fingers of the comb-shaped electrode and a portion provided above the comb-shaped electrode. The portion provided between the electrode fingers is provided between the piezoelectric substrate and the first dielectric film. The portion provided above the comb-shaped electrode is provided between the comb-shaped electrode and the first dielectric film. A speed of a transverse wave propagating through the first dielectric film is lower than a speed of the Rayleigh wave excited by the comb-shaped electrode.Type: ApplicationFiled: February 24, 2014Publication date: June 19, 2014Applicant: Panasonic CorporationInventors: TOMOHIRO IWASAKI, HIROYUKI NAKAMURA, TOMOYA KOMATSU
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Publication number: 20140144237Abstract: An acoustic wave sensor includes a piezoelectric substrate, a transmitting electrode configured to excite a main acoustic wave propagating through a propagation region of an upper surface of the piezoelectric substrate, a receiving electrode configured to receive the propagated main acoustic wave, a first insulating film provided on the propagation region of the upper surface of the piezoelectric substrate, a second insulating film provided on the upper surface of the piezoelectric substrate to cover the first insulating film, and a reaction section provided on the upper surface of the second insulating film above the propagation region. The reaction section is configured to react with an object. A velocity of a transverse wave propagating through the first insulating film is higher than a velocity of a transverse wave propagating through the second insulating film. The acoustic wave sensor described above has high detection sensitivity.Type: ApplicationFiled: January 15, 2013Publication date: May 29, 2014Inventors: Tomoya Komatsu, Hiroyuki Nakamura, Shigeru Tsuzuki, Tomohiro Iwasaki, Tetsuo Kawasaki, Kazunori Nishimura
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Publication number: 20140113571Abstract: An electronic device includes a main circuit connected between an input terminal and an output terminal, and an auxiliary circuit connected in parallel to the main circuit between the input terminal and the output terminal. The main circuit includes a filter having a first passband and a stopband. The auxiliary circuit has a passing characteristic that allows a signal having a frequency in a certain frequency band inside the stopband to pass through the auxiliary circuit. The main circuit is configured to output a main signal in response to an input signal. The auxiliary circuit is configured to output an auxiliary signal in response to the input signal. The main signal and the auxiliary signal contain phase components opposite to each other in the certain frequency band inside the stopband. This electronic device has an attenuation amount in the stopband.Type: ApplicationFiled: October 10, 2013Publication date: April 24, 2014Applicant: PANASONIC CORPORATIONInventors: JOJI FUJIWARA, TORU JIBU, TOMOYA KOMATSU, HIROYUKI NAKAMURA, TETSUYA TSURUNARI, KAZUNORI NISHIMURA
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Publication number: 20140049341Abstract: A multimode elastic wave device includes a pair of reflectors, and a first interdigital transducer (IDT) electrode through a fifth IDT electrode arranged between the pair of reflectors. In this configuration, each of the average of electrode-finger pitches in the first IDT electrode and the average of electrode-finger pitches in the fifth IDT electrode is smaller than both of the average of electrode-finger pitches in the second IDT electrode and the average of electrode-finger pitches in the fourth IDT electrode.Type: ApplicationFiled: February 5, 2013Publication date: February 20, 2014Applicant: PANASONIC CORPORATIONInventors: Tomoya Komatsu, Joji Fujiwara, Tetsuya Tsurunari, Hiroyuki Nakamura, Kazunori Nishimura
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Publication number: 20140001919Abstract: An elastic wave element includes a piezoelectric substrate, an IDT electrode, and a first dielectric film. The IDT electrode includes a first bus bar electrode, a second bus bar electrode, first electrode fingers, and second electrode fingers. The piezoelectric substrate includes a bus bar electrode region, an alternately disposed region, and an intermediate region. The first dielectric film is formed in at least a part of the intermediate region, and formed of a medium in which acoustic velocity of a transverse wave propagating in the first dielectric film is lower than acoustic velocity of a main elastic wave in the alternately disposed region.Type: ApplicationFiled: March 5, 2012Publication date: January 2, 2014Applicant: Panasonic CorporationInventors: Tomoya Komatsu, Hiroyuki Nakamura, Tetsuya Tsurunari, Joji Fujiwara, Hidekazu Nakanishi