Patents by Inventor Kaoru Miura
Kaoru Miura 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: 20160315245Abstract: The present invention provides a lead-free piezoelectric material having a high piezoelectric constant over a wide operating temperature region. Therefore, the present invention relates to a piezoelectric material including a perovskite-type metal oxide represented by general formula (1) below as a main component, wherein the average valence, of Sn contained in the general formula (1) lies between 2 and 4. (BavCawSnxTiyZrz)O3 (where 0.620?v?0.970, 0.010?w?0.200, 0.030?x?0.230, 0.865?y?0.990, 0?z?0.085, and 1.986?v+w+x+y+z?2.Type: ApplicationFiled: December 11, 2014Publication date: October 27, 2016Inventors: Makoto Kubota, Hisato Yabuta, Shunsuke Murakami, Kaoru Miura, Kanako Oshima
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Patent number: 9240542Abstract: There is provided a piezoelectric ceramic having a high and stable piezoelectric constant and a high and stable mechanical quality factor in a wide operating temperature range, and a piezoelectric element according to the present invention includes a main component containing a perovskite type metal oxide having the following general formula (1) or (2); and Mn as a first auxiliary component, (Ba1-xCax)a(Ti1-y-zSnyZrz)O3??(1) (0.08?x?0.20, 0.01?y?0.04, 0<z?0.04) (Ba1-xCax)a(Ti1-ySny)O3??(2) (0.08?x?0.20, 0.01?y?0.04) wherein the amount b (mol) of Mn per mole of the metal oxide is in the range of 0.0048?b?0.0400, and the value a of the general formula (1) or (2) is in the range of 0.9925+b?a?1.0025+b.Type: GrantFiled: April 23, 2013Date of Patent: January 19, 2016Assignee: Canon Kabushiki KiashaInventors: Hiroshi Saito, Kanako Oshima, Kaoru Miura, Hisato Yabuta, Jumpei Hayashi
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Patent number: 9082975Abstract: Provided is a Bi-based piezoelectric material having good piezoelectric properties. The piezoelectric material includes a perovskite-type metal oxide represented by the following general formula (1): Ax(ZnjTi(1-j))l(MgkTi(1-k))mMnO3??General formula (1) where: A represents a Bi element, or one or more kinds of elements selected from the group consisting of trivalent metal elements and containing at least a Bi element; M represents at least one kind of an element selected from the group consisting of Fe, Al, Sc, Mn, Y, Ga, and Yb; and 0.9?x?1.25, 0.4?j?0.6, 0.4?k?0.6, 0.09?l?0.49, 0.19?m?0.64, 0.13?n?0.48, and l+m+n=1 are satisfied.Type: GrantFiled: February 28, 2011Date of Patent: July 14, 2015Assignees: Canon Kabushiki Kaisha, Tokyo Institute of Technology, Sophia School CorporationInventors: Makoto Kubota, Kaoru Miura, Hisato Yabuta, Takayuki Watanabe, Jumpei Hayashi, Hiroshi Funakubo, Tomoaki Yamada, Shintaro Yasui, Keisuke Yazawa, Hiroshi Uchida, Jun-ichi Nagata
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Patent number: 9022531Abstract: The piezoelectric element includes, on a substrate: a piezoelectric film; and a pair of electrodes provided in contact with the piezoelectric film; in which the piezoelectric film contains a perovskite-type metal oxide represented by the general formula (1) as a main component: Ax(ZnjTi(1-j))l(MgkTi(1-k))mMnO3??General Formula (1) wherein the perovskite-type metal oxide is uniaxially (111)-oriented in pseudo-cubic notation in a thickness direction, of the pair of electrodes, a lower electrode provided on the substrate side is a multilayer electrode including at least a first electrode layer in contact with the substrate and a second electrode layer in contact with the piezoelectric film, and the second electrode layer is a perovskite-type metal oxide electrode which is uniaxially (111)-oriented in pseudo-cubic notation in a thickness direction.Type: GrantFiled: February 19, 2013Date of Patent: May 5, 2015Assignees: Canon Kabushiki Kaisha, Tokyo Institute of Technology, Sophia School CorporationInventors: Makoto Kubota, Kaoru Miura, Hisato Yabuta, Takayuki Watanabe, Jumpei Hayashi, Hiroshi Funakubo, Shintaro Yasui, Takahiro Oikawa, Jun-ichi Nagata, Hiroshi Uchida
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Patent number: 8981626Abstract: A piezoelectric material contains a perovskite oxynitride expressed by the General Formula: (Ba1-xSrx)(Ti1-3z(Nb1-yTay)3z)(O1-wNw)3. In the formula, x, y, z and w are numerical values satisfying the relationships: 0?x?1, 0?y?1, 0<z<<?, and 0<w?z. Also, z can be 0.1?z?0.2. The piezoelectric material may be in the form of a film having a thickness in the range of 200 nm to 10 ?m that is disposed on a substrate. The perovskite oxynitride may have a tetragonal crystal structure.Type: GrantFiled: December 14, 2012Date of Patent: March 17, 2015Assignee: Canon Kabushiki KaishaInventors: Kaoru Miura, Makoto Kubota, Jumpei Hayashi, Takayuki Watanabe
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Patent number: 8974729Abstract: Provided are resin-based and metal-based anti-thermally-expansive members each having small thermal expansion. More specifically, provided are an anti-thermally-expansive resin and an anti-thermally-expansive metal, each including a resin or a metal having a positive linear expansion coefficient at 20° C. and a solid particle dispersed in the resin or metal, in which the solid particle includes at least an oxide represented by the following general formula (1): (Bi1-xMx)NiO3 (1), where M represents at least one metal selected from the group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and In; and x represents a numerical value of 0.02?x?0.15.Type: GrantFiled: January 10, 2014Date of Patent: March 10, 2015Assignees: Canon Kabushiki Kaisha, Kyoto UniversityInventors: Makoto Kubota, Kaoru Miura, Hisato Yabuta, Yoshihiko Matsumura, Yuichi Shimakawa, Masaki Azuma
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Publication number: 20140234643Abstract: Provided are a thermal expansion suppressing member having negative thermal expansion properties and a metal-based anti-thermally-expansive member having small thermal expansion. More specifically, provided are a thermal expansion suppressing member, including at least an oxide represented by the following general formula (1), and an anti-thermally-expansive member, including a metal having a positive linear expansion coefficient at 20° C., and a solid body including at least an oxide represented by the following general formula (1), the metal and solid being joined to each other: (Bi1-xMx)NiO3 (1) where M represents at least one metal selected from the group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and In; and x represents a numerical value of 0.02?x?0.15.Type: ApplicationFiled: April 25, 2014Publication date: August 21, 2014Applicants: KYOTO UNIVERSITY, CANON KABUSHIKI KAISHAInventors: Makoto Kubota, Kaoru Miura, Hisato Yabuta, Yoshihiko Matsumura, Yuichi Shimakawa, Masaki Azuma
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Patent number: 8753749Abstract: Provided are a thermal expansion suppressing member having negative thermal expansion properties and a metal-based anti-thermally-expansive member having small thermal expansion. More specifically, provided are a thermal expansion suppressing member, including at least an oxide represented by the following general formula (1), and an anti-thermally-expansive member, including a metal having a positive linear expansion coefficient at 20° C., and a solid body including at least an oxide represented by the following general formula (1), the metal and solid being joined to each other: (Bi1-xMx)NiO3 (1) where M represents at least one metal selected from the group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and In; and x represents a numerical value of 0.02?x?0.15.Type: GrantFiled: August 8, 2011Date of Patent: June 17, 2014Assignees: Canon Kabushiki Kaisha, Kyoto UniversityInventors: Makoto Kubota, Kaoru Miura, Hisato Yabuta, Yoshihiko Matsumura, Yuichi Shimakawa, Masaki Azuma
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Publication number: 20140134038Abstract: Provided are resin-based and metal-based anti-thermally-expansive members each having small thermal expansion. More specifically, provided are an anti-thermally-expansive resin and an anti-thermally-expansive metal, each including a resin or a metal having a positive linear expansion coefficient at 20° C. and a solid particle dispersed in the resin or metal, in which the solid particle includes at least an oxide represented by the following general formula (1): (Bi1-xMx)NiO3 (1), where M represents at least one metal selected from the group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and In; and x represents a numerical value of 0.02?x?0.15.Type: ApplicationFiled: January 10, 2014Publication date: May 15, 2014Applicants: KYOTO UNIVERSITY, CANON KABUSHIKI KAISHAInventors: Makoto Kubota, Kaoru Miura, Hisato Yabuta, Yoshihiko Matsumura, Yuichi Shimakawa, Masaki Azuma
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Patent number: 8678562Abstract: Provided is a piezoelectric material including a bismuth barium niobium oxide-based tungsten bronze structure metal oxide having a high Curie temperature and being excellent in piezoelectric property. The piezoelectric material includes a metal oxide having a tungsten bronze structure represented by the following general formula (1), in which the metal oxide having a tungsten bronze structure includes Li, and a content of the Li is 0.015 weight percent or more and 0.600 weight percent or less in terms of metal with respect to 100 parts by weight of the metal oxide: AxB10O30??(1) where A represents Ba and Bi, or at least one kind or more of elements selected from the group consisting of: Na, Sr, and Ca in addition to Ba and Bi; B represents Nb, or Nb and Ta; and x represents a numerical value of 4.5<x<5.5.Type: GrantFiled: September 28, 2010Date of Patent: March 25, 2014Assignee: Canon Kabushiki KaishaInventors: Jumpei Hayashi, Takayuki Watanabe, Takanori Matsuda, Kaoru Miura, Makoto Kubota
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Patent number: 8664316Abstract: Provided are resin-based and metal-based anti-thermally-expansive members each having small thermal expansion. More specifically, provided are an anti-thermally-expansive resin and an anti-thermally-expansive metal, each including a resin or a metal having a positive linear expansion coefficient at 20° C. and a solid particle dispersed in the resin or metal, in which the solid particle includes at least an oxide represented by the following general formula (1): (Bi1-xMx)NiO3??(1), where M represents at least one metal selected from the group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and In; and x represents a numerical value of 0.02?x?0.15.Type: GrantFiled: August 8, 2011Date of Patent: March 4, 2014Assignees: Canon Kabushiki Kaisha, Kyoto UniversityInventors: Makoto Kubota, Kaoru Miura, Hisato Yabuta, Yoshihiko Matsumura, Yuichi Shimakawa, Masaki Azuma
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Publication number: 20130330541Abstract: Provided is a piezoelectric material excellent in piezoelectricity. The piezoelectric material includes a perovskite-type complex oxide represented by the following General Formula (1). A(ZnxTi(1-x))yM(1-y)O3??(1) wherein A represents at least one kind of element containing at least a Bi element and selected from a trivalent metal element; M represents at least one kind of element of Fe, Al, Sc, Mn, Y, Ga, and Yb; x represents a numerical value satisfying 0.4?x?0.6; and y represents a numerical value satisfying 0.1?y?0.9.Type: ApplicationFiled: August 5, 2013Publication date: December 12, 2013Applicants: CANON KABUSHIKI KAISHA, KYOTO UNIVERSITY, TOKYO INSTITUTE OF TECHNOLOGY, TOKYO UNIVERSITY OF SCIENCE EDUCATIONAL FOUNDATION ADMINISTRATIVE ORGANIZATION, UNIVERSITY OF YAMANASHI, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCES AND TECHNOLOGY, SOPHIA UNIVERSITYInventors: Makoto Kubota, Kaoru Miura, Toshihiro Ifuku, Jumpei Hayashi, Masaki Azuma, Olga Alexandrovna Smirnova, Hiroshi Funakubo, Hiroshi Uchida, Nobuhiro Kumada, Satoshi Wada, Takashi Iijima, Soichiro Okamura
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Publication number: 20130278681Abstract: There is provided a lead-free piezoelectric ceramic having a high and stable piezoelectric constant and a high and stable mechanical quality factor in a wide operating temperature range. A method for manufacturing the lead-free piezoelectric ceramic is also provided. the general formula (1) (Ba1-xCax)a(Ti1-y-zSnyZrz)O3 (0.08?x?0.20, 0.01?y?0.04, 0?z?0.04)??(1) A piezoelectric ceramic includes a main component containing a perovskite type metal oxide having the following general formula (1); and Mn as a first auxiliary component. The amount b (mol) of Mn per mole of the metal oxide is in the range of 0.0048?b?0.0400, and the value a of the general formula (1) or (2) is in the range of 0.9925+b?a?1.0025+b.Type: ApplicationFiled: April 23, 2013Publication date: October 24, 2013Inventors: Hiroshi Saito, Kanako Oshima, Kaoru Miura, Hisato Yabuta, Jumpei Hayashi
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Patent number: 8529785Abstract: Provided is a piezoelectric material excellent in piezoelectricity. The piezoelectric material includes a perovskite-type complex oxide represented by the following General Formula (1). A(ZnxTi(1-x))yM(1-y)O3??(1) wherein A represents at least one kind of element containing at least a Bi element and selected from a trivalent metal element; M represents at least one kind of element of Fe, Al, Sc, Mn, Y, Ga, and Yb; x represents a numerical value satisfying 0.4?x?0.6; and y represents a numerical value satisfying 0.1?y?0.9.Type: GrantFiled: July 24, 2009Date of Patent: September 10, 2013Assignees: Canon Kabushiki Kaisha, Kyoto University, Tokyo Institute of Technology, Sophia University, University of Yamanashi, National Institute of Advanced Industrial Science and Technology, Tokyo University of Science Educational Foundation Administrative OrganizationInventors: Makoto Kubota, Kaoru Miura, Toshihiro Ifuku, Jumpei Hayashi, Masaki Azuma, Olga Alexandrovna Smirnova, Hiroshi Funakubo, Hiroshi Uchida, Nobuhiro Kumada, Satoshi Wada, Takashi Iijima, Soichiro Okamura
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Patent number: 8480918Abstract: The present invention provides a piezoelectric material which can be applied even to the MEMS technique, exhibits satisfactory piezoelectricity even at high ambient temperatures and is environmentally clean, namely, a piezoelectric material including an oxide obtained by forming a solid solution composed of two perovskite oxides A(1)B(1)O3 and A(2)B(2)O3 different from each other in crystalline phase, the oxide being represented by the following general formula (1): X{A(1)B(1)O3}?(1?X){A(2)B(2)O3}??(1) wherein “A(1)” and “A(2)” are each an element including an alkali earth metal and may be the same or different from each other; “B(1)” and “B(2)” each include two or more metal elements, and either one of “B(1)” and “B(2)” contains Cu in a content of 3 atm % or more; and “X” satisfies the relation 0<X<1.Type: GrantFiled: June 9, 2008Date of Patent: July 9, 2013Assignee: Canon Kabushiki KaishaInventors: Kaoru Miura, Toshihiro Ifuku, Kenichi Takeda, Tetsuro Fukui, Hiroshi Funakubo
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Publication number: 20130127298Abstract: Provided is a Bi-based piezoelectric material having good piezoelectric properties. The piezoelectric material includes a perovskite-type metal oxide represented by the following general formula (1): Ax(ZnjTi(1-j))l(MgkTi(1-k))mMnO3??General formula (1) where: A represents a Bi element, or one or more kinds of elements selected from the group consisting of trivalent metal elements and containing at least a Bi element; M represents at least one kind of an element selected from the group consisting of Fe, Al, Sc, Mn, Y, Ga, and Yb; and 0.9?x?1.25, 0.4?j?0.6, 0.4?k?0.6, 0.09?l?0.49, 0.19?m?0.64, 0.13?n?0.48, and l+m+n=1 are satisfied.Type: ApplicationFiled: February 28, 2011Publication date: May 23, 2013Applicants: CANON KABUSHIKI KAISHA, SOPHIA SCHOOL CORPORATION, TOKYO INSTITUTE OF TECHNOLOGYInventors: Makoto Kubota, Kaoru Miura, Hisato Yabuta, Takayuki Watanabe, Jumpei Hayashi, Hiroshi Funakubo, Tomoaki Yamada, Shintaro Yasui, Keisuke Yazawa, Hiroshi Uchida, Jun-ichi Nagata
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Patent number: 8356887Abstract: Provided are a piezoelectric element that can effectively utilize a piezoelectric constant d15 to increase a deflection displacement of a vibrating plate, and devices using the piezoelectric element. The piezoelectric element includes: a first electrode; a second electrode; a vibrating plate that is in contact with the first electrode; a piezoelectric film provided between the first electrode and the second electrode; at least one recess formed on the second electrode side of the piezoelectric film; and a third electrode formed on an inner side wall of the at least one recess, in which the third electrode is connected to the second electrode.Type: GrantFiled: March 4, 2010Date of Patent: January 22, 2013Assignee: Canon Kabushiki KaishaInventors: Kaoru Miura, Tatsuo Furuta
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Publication number: 20120162319Abstract: Provided is a piezoelectric material including a bismuth barium niobium oxide-based tungsten bronze structure metal oxide having a high Curie temperature and being excellent in piezoelectric property. The piezoelectric material includes a metal oxide having a tungsten bronze structure represented by the following general formula (1), in which the metal oxide having a tungsten bronze structure includes Li, and a content of the Li is 0.015 weight percent or more and 0.600 weight percent or less in terms of metal with respect to 100 parts by weight of the metal oxide: AxB100O30??(1) where A represents Ba and Bi, or at least one kind or more of elements selected from the group consisting of: Na, Sr, and Ca in addition to Ba and Bi; B represents Nb, or Nb and Ta; and x represents a numerical value of 4.5<x<5.5.Type: ApplicationFiled: September 28, 2010Publication date: June 28, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Jumpei Hayashi, Takayuki Watanabe, Takanori Matsuda, Kaoru Miura, Makoto Kubota
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Publication number: 20120040196Abstract: Provided are a thermal expansion suppressing member having negative thermal expansion properties and a metal-based anti-thermally-expansive member having small thermal expansion. More specifically, provided are a thermal expansion suppressing member, including at least an oxide represented by the following general formula (1), and an anti-thermally-expansive member, including a metal having a positive linear expansion coefficient at 20° C., and a solid body including at least an oxide represented by the following general formula (1), the metal and solid being joined to each other: (Bi1-xMx)NiO3 (1) where M represents at least one metal selected from the group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and In; and x represents a numerical value of 0.02?x?0.15.Type: ApplicationFiled: August 8, 2011Publication date: February 16, 2012Applicants: KYOTO UNIVERSITY, CANON KABUSHIKI KAISHAInventors: Makoto Kubota, Kaoru Miura, Hisato Yabuta, Yoshihiko Matsumura, Yuichi Shimakawa, Masaki Azuma
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Publication number: 20120037842Abstract: Provided are resin-based and metal-based anti-thermally-expansive members each having small thermal expansion. More specifically, provided are an anti-thermally-expansive resin and an anti-thermally-expansive metal, each including a resin or a metal having a positive linear expansion coefficient at 20° C. and a solid particle dispersed in the resin or metal, in which the solid particle includes at least an oxide represented by the following general formula (1): (Bi1-xMx)NiO3 (1), where M represents at least one metal selected from the group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and In; and x represents a numerical value of 0.02?x?0.15.Type: ApplicationFiled: August 8, 2011Publication date: February 16, 2012Applicants: KYOTO UNIVERSITY, CANON KABUSHIKI KAISHAInventors: Makoto Kubota, Kaoru Miura, Hisato Yabuta, Yoshihiko Matsumura, Yuichi Shimakawa, Masaki Azuma