Patents by Inventor Yuichiro Sueda
Yuichiro Sueda 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: 11978592Abstract: A dielectric composition includes dielectric particles and first segregations. The dielectric particles each include a perovskite compound represented by ABO3 as a main component. The first segregations each include at least Ba, P, and O. A molar ratio (Ba/Ti) of Ba to Ti in the first segregations is 1.20 or more.Type: GrantFiled: May 19, 2022Date of Patent: May 7, 2024Assignee: TDK CORPORATIONInventors: Toshihiro Iguchi, Yuichiro Sueda, Ryota Namiki
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Patent number: 11961675Abstract: A ceramic electronic device includes an element body and an external electrode. The element body is formed by laminating a ceramic layer and an internal electrode layer. The external electrode is electrically connected to at least one end of the internal, electrode layer. The element body includes a boundary layer at an end of the ceramic layer. The ceramic layer includes a perovskite compound represented by ABO3 as a main component. The boundary layer includes Ba and Ti as a main component. The boundary layer includes 0.27-0.40 parts by mol of Ba, provided that a total of Ba and Ti included in the boundary layer is 1 part by mol.Type: GrantFiled: March 2, 2022Date of Patent: April 16, 2024Assignee: TDK CORPORATIONInventors: Toshihiro Iguchi, Yuichiro Sueda, Ryota Namiki
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Publication number: 20230386745Abstract: A dielectric composition, including: dielectric grains containing a main component represented by a composition formula [(CaxSr(1-x))O]m[(TiyHfzZr(1-y-z))O2] (m is more than 1.020); a grain boundary phase located between the dielectric grains; and segregation grains each containing at least Ca, Si, and O. A first segregation grain is defined as a segregation further containing Mn among the segregation grains each containing at least Ca, Si, and O, and a second segregation grain is defined as a segregation containing substantially no Mn among the segregation grains each containing at least Ca, Si, and O. N1/(N1+N2) is more than 0.23 and 1.00 or less, in which N1 is a number density of first segregation grains in a cross-section of the dielectric composition, and N2 is a number density of second segregation grains in the cross-section of the dielectric composition.Type: ApplicationFiled: May 11, 2023Publication date: November 30, 2023Applicant: TDK CORPORATIONInventors: Yuichiro SUEDA, Kengo AIZAWA, Shota KUMAGAI, Takeshi SHOUJI, Satoshi SUGAWARA, Masatoshi TARUTANI, Atsushi YAMADA, Manabu KUMAGAI
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Patent number: 11823840Abstract: A ceramic electronic device includes an element body and an external electrode. The element body is formed by laminating a ceramic layer and an internal electrode layer. The external electrode is electrically connected to at least one end of the internal electrode layer. At least a part of a joint boundary between the electrode layer and the ceramic layer includes an interface protrusion on the external electrode side. The interface protrusion is made of an oxide.Type: GrantFiled: March 1, 2022Date of Patent: November 21, 2023Assignee: TDK CORPORATIONInventors: Toshihiro Iguchi, Yuichiro Sueda, Ryota Namiki
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Patent number: 11823842Abstract: A ceramic electronic device includes an element body and an external electrode. The element body includes a ceramic layer and an internal electrode layer. The external electrode is formed on an end surface of the element body and electrically connected to a part of the internal electrode layer. The ceramic layer includes a perovskite compound represented by ABO3 as a main component. The external electrode includes a conductor and a glass frit diffused in the conductor. The glass frit includes B, Si, Ba, and Zn. A boundary layer is present at an end of the ceramic layer in contact with the external electrode on the end surface of the element body and comprises an oxide including Ba, Zn, and Si.Type: GrantFiled: March 1, 2022Date of Patent: November 21, 2023Assignee: TDK CORPORATIONInventors: Toshihiro Iguchi, Yuichiro Sueda, Ryota Namiki
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Patent number: 11823841Abstract: A ceramic electronic device includes an element body and an external electrode. The element body includes a ceramic layer and an internal electrode layer. The external electrode is formed on an end surface of the element body and electrically connected to a part of the internal electrode layer. The ceramic layer includes a perovskite compound represented by ABO3 as a main component. The external electrode includes a baked electrode layer having a first region and a second region. The first region is contacted with the end surface of the element body and located near a joint boundary with the element body. The second region is located outside the first region and constitutes an outer surface of the baked electrode layer. The first region includes a glass frit including at least B, Zn, and Si. The second region includes an oxide having a higher melting point than Cu.Type: GrantFiled: March 1, 2022Date of Patent: November 21, 2023Assignee: TDK CORPORATIONInventors: Toshihiro Iguchi, Yuichiro Sueda, Ryota Namiki
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Publication number: 20230245824Abstract: A multilayer electronic device, including an element body constituted by alternately laminating dielectric layers and internal electrode layers, in which: a molar ratio of MgO to SiO2 in the dielectric layer is 1 to 5, a molar ratio of MgO to MnO in the dielectric layer is 5 to 13, the element body contains a segregation phase, and assuming that a total amount of MgO, NiO, MnO, Cr2O3, and SiO2 in the segregation phase is 100 molar parts, an amount of MgO in the segregation phase is 63.0 to 99.5 molar parts, and an amount of MnO in the segregation phase is 0.5 to 12.6 molar parts.Type: ApplicationFiled: November 29, 2022Publication date: August 3, 2023Applicant: TDK CORPORATIONInventor: Yuichiro SUEDA
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Patent number: 11710599Abstract: A ceramic electronic device includes an element body and an external electrode. The element body is formed by laminating a ceramic layer and an internal electrode layer. The external electrode is electrically connected to at least one end of the internal electrode layer. The external electrode includes a baked electrode layer. The baked electrode layer includes a first region and a second region. The first region is contacted with an end surface of the element body and located near a joint boundary with the element body. The second region is located outside the first region and constituting an outer surface of the baked electrode layer. The first region includes a first glass having a predetermined composition. The second region includes a second glass having a predetermined composition.Type: GrantFiled: March 2, 2022Date of Patent: July 25, 2023Assignee: TDK CORPORATIONInventors: Toshihiro Iguchi, Yuichiro Sueda, Ryota Namiki, Yasuhiro Okui, Atsushi Watanabe
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Publication number: 20220392704Abstract: A dielectric composition includes dielectric particles and first segregations. The dielectric particles each include a perovskite compound represented by ABO3 as a main component. The first segregations each include Ba, Ti, Si, Ni, and O.Type: ApplicationFiled: May 19, 2022Publication date: December 8, 2022Applicant: TDK CORPORATIONInventors: Toshihiro IGUCHI, Hiroaki MURAKAMI, Yuichiro SUEDA, Ryota NAMIKI
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Publication number: 20220384111Abstract: A dielectric composition includes dielectric particles and first segregations. The dielectric particles each include a perovskite compound represented by ABO3 as a main component. The first segregations each include at least Ba, V, and O. A molar ratio (Ba/Ti) of Ba to Ti detected in the first segregations is 1.20 or more.Type: ApplicationFiled: May 19, 2022Publication date: December 1, 2022Applicant: TDK CORPORATIONInventors: Toshihiro IGUCHI, Yuichiro SUEDA, Ryota NAMIKI
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Publication number: 20220384112Abstract: A dielectric composition includes dielectric particles and first segregations. The dielectric particles each include a perovskite compound represented by ABO3 as a main component. The first segregations each include at least Ba, P, and O. A molar ratio (Ba/Ti) of Ba to Ti in the first segregations is 1.20 or more.Type: ApplicationFiled: May 19, 2022Publication date: December 1, 2022Applicant: TDK CORPORATIONInventors: Toshihiro IGUCHI, Yuichiro SUEDA, Ryota NAMIKI
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Publication number: 20220380257Abstract: A dielectric composition includes dielectric particles, grain boundary phases, and segregations. The dielectric particles each include a perovskite compound represented by ABO3 as a main component. The grain boundary phases are located between the dielectric particles. The segregations exist in a part of the grain boundary phases and include at least Al, Si, and O. A molar ratio (Al/(Al+Si)) of an Al content to a total content of Al and Si in the segregations is 0.45 or more and 0.75 or less.Type: ApplicationFiled: May 19, 2022Publication date: December 1, 2022Applicant: TDK CORPORATIONInventors: Toshihiro IGUCHI, Yuichiro SUEDA, Ryota NAMIKI
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Publication number: 20220293344Abstract: A ceramic electronic device includes an element body and an external electrode. The element body includes a ceramic layer and an internal electrode layer. The external electrode is formed on an end surface of the element body and electrically connected to a part of the internal electrode layer. The ceramic layer includes a perovskite compound represented by ABO3 as a main component. The external electrode includes a baked electrode layer having a first region and a second region. The first region is contacted with the end surface of the element body and located near a joint boundary with the element body. The second region is located outside the first region and constitutes an outer surface of the baked electrode layer. The first region includes a glass frit including at least B and Si. The second region includes an Al based oxide mainly including Al.Type: ApplicationFiled: March 1, 2022Publication date: September 15, 2022Applicant: TDK CORPORATIONInventors: Toshihiro IGUCHI, Yuichiro SUEDA, Ryota NAMIKI
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Publication number: 20220293343Abstract: A ceramic electronic device includes an element body and an external electrode. The element body is formed by laminating a ceramic layer and an internal electrode layer. The external electrode is electrically connected to at least one end of the internal, electrode layer. The element body includes a boundary layer at an end of the ceramic layer. The ceramic layer includes a perovskite compound represented by ABO3 as a main component. The boundary layer includes Ba and Ti as a main component. The boundary layer includes 0.27-0.40 parts by mol of Ba, provided that a total of Ba and Ti included in the boundary layer is 1 part by mol.Type: ApplicationFiled: March 2, 2022Publication date: September 15, 2022Applicant: TDK CORPORATIONInventors: Toshihiro IGUCHI, Yuichiro SUEDA, Ryota NAMIKI
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Publication number: 20220285095Abstract: A ceramic electronic device includes an element body and an external electrode. The element body is formed by laminating a ceramic layer and an internal electrode layer. The external electrode is electrically connected to at least one end of the internal electrode layer. The external electrode includes a baked electrode layer. The baked electrode layer includes a first region and a second region. The first region is contacted with an end surface of the element body and located near a joint boundary with the element body. The second region is located outside the first region and constituting an outer surface of the baked electrode layer. The first region includes a first glass having a predetermined composition. The second region includes a second glass having a predetermined composition.Type: ApplicationFiled: March 2, 2022Publication date: September 8, 2022Applicant: TDK CORPORATIONInventors: Toshihiro IGUCHI, Yuichiro SUEDA, Ryota NAMIKI, Yasuhiro OKUI, Atsushi WATANABE
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Publication number: 20220285096Abstract: A ceramic electronic device includes an element body and an external electrode. The element body is formed by laminating a ceramic layer and an internal electrode layer. The external electrode is electrically connected to at least one end of the internal electrode layer. At least a part of a joint boundary between the electrode layer and the ceramic layer includes an interface protrusion on the external electrode side. The interface protrusion is made of an oxide.Type: ApplicationFiled: March 1, 2022Publication date: September 8, 2022Applicant: TDK CORPORATIONInventors: Toshihiro IGUCHI, Yuichiro SUEDA, Ryota NAMIKI
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Publication number: 20220285097Abstract: A ceramic electronic device includes an element body and an external electrode. The element body includes a ceramic layer and an internal electrode layer. The external electrode is formed on an end surface of the element body and electrically connected to a part of the internal electrode layer. The ceramic layer includes a perovskite compound represented by ABO3 as a main component. The external electrode includes a baked electrode layer having a first region and a second region. The first region is contacted with the end surface of the element body and located near a joint boundary with the element body. The second region is located outside the first region and constitutes an outer surface of the baked electrode layer. The first region includes a glass frit including at least B, Zn, and Si. The second region includes an oxide having a higher melting point than Cu.Type: ApplicationFiled: March 1, 2022Publication date: September 8, 2022Applicant: TDK CORPORATIONInventors: Toshihiro IGUCHI, Yuichiro SUEDA, Ryota NAMIKI
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Publication number: 20220285098Abstract: A ceramic electronic device includes an element body and an external electrode. The element body includes a ceramic layer and an internal electrode layer. The external electrode is formed on an end surface of the element body and electrically connected to a part of the internal electrode layer. The ceramic layer includes a perovskite compound represented by ABO3 as a main component. The external electrode includes a conductor and a glass frit diffused in the conductor. The glass frit includes B, Si, Ba, and Zn. A boundary layer is present at an end of the ceramic layer in contact with the external electrode on the end surface of the element body and comprises an oxide including Ba, Zn, and Si.Type: ApplicationFiled: March 1, 2022Publication date: September 8, 2022Applicant: TDK CORPORATIONInventors: Toshihiro IGUCHI, Yuichiro SUEDA, Ryota NAMIKI
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Patent number: 8335073Abstract: A dielectric ceramic composition includes, as a main component, a compound having perovskite type crystal structure shown by a general formula ABO3, as subcomponents, in terms of respective element with respect to 100 moles of the compound, and 0.6 to 2.0 moles of an oxide of Mg, 0.010 to 0.6 mole of oxide of Mn and/or Cr, 0.010 to 0.2 mole of an oxide of at least one selected from V, Mo and W, 0.10 to 1.0 mole of an oxide of R1 (R1 is at least one selected from Y, Yb, Er and Ho), 0.10 to 1.0 mole of an oxide of R2 (R2 is at least one selected from Dy, Gd and Tb) and 0.2 to 1.5 moles of a component consisting of an oxide of Ba and/or oxide of Ca and an oxide of Si. According to the present invention, even when a dielectric layer is made thinner, a dielectric ceramic composition having good characteristics can be provided.Type: GrantFiled: March 9, 2011Date of Patent: December 18, 2012Assignee: TDK CorporationInventors: Kazuhiro Komatsu, Yoichiro Hoshi, Shuhei Yoshikawa, Yuichiro Sueda
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Publication number: 20110222206Abstract: A dielectric ceramic composition includes, as a main component, a compound having perovskite type crystal structure shown by a general formula ABO3, as subcomponents, in terms of respective element with respect to 100 moles of the compound, and 0.6 to 2.0 moles of an oxide of Mg, 0.010 to 0.6 mole of oxide of Mn and/or Cr, 0.010 to 0.2 mole of an oxide of at least one selected from V, Mo and W, 0.10 to 1.0 mole of an oxide of R1 (R1 is at least one selected from Y, Yb, Er and Ho), 0.10 to 1.0 mole of an oxide of R2 (R2 is at least one selected from Dy, Gd and Tb) and 0.2 to 1.5 moles of a component consisting of an oxide of Ba and/or oxide of Ca and an oxide of Si. According to the present invention, even when a dielectric layer is made thinner, a dielectric ceramic composition having good characteristics can be provided.Type: ApplicationFiled: March 9, 2011Publication date: September 15, 2011Applicant: TDK CORPORATIONInventors: Kazuhiro KOMATSU, Yoichiro HOSHI, Shuhei YOSHIKAWA, Yuichiro SUEDA