Patents by Inventor Miyuki Asai
Miyuki Asai 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: 11705265Abstract: In a coil component, a second magnetic portion disposed in the vicinity of a coil is designed to have a higher proportion of Fe than a metal magnetic powder-containing resin constituting a first magnetic portion. Therefore, a magnetic flux of the coil flows smoothly. Although the second magnetic portion has a relatively lower withstand voltage than the first magnetic portion, since the second magnetic portion is surrounded by the first magnetic portion, it is not exposed on an outer surface of a magnetic body. For this reason, a situation in which the coil and external terminal electrodes are short-circuited with the second magnetic portion therebetween is effectively curbed, and short-circuiting between the coil and the external terminal electrodes can be curbed.Type: GrantFiled: May 19, 2020Date of Patent: July 18, 2023Assignee: TDK CORPORATIONInventors: Miyuki Asai, Takahiro Kawahara, Masazumi Arata, Hitoshi Ohkubo
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Patent number: 11705270Abstract: In a coil component, an uneven structure provided by an insulation layer and a resin wall contributes to extension of a contact area with respect to a magnetic body, so that an adhesive force with respect to the magnetic body is improved. In addition, the magnetic body protrudes downward toward an exposed region of the resin wall corresponding to a recessed portion in the uneven structure, a volume thereof is increased, and coil characteristics such as an inductance value are improved.Type: GrantFiled: May 19, 2020Date of Patent: July 18, 2023Assignee: TDK CORPORATIONInventors: Miyuki Asai, Hokuto Eda, Masazumi Arata, Hitoshi Ohkubo
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Patent number: 11680307Abstract: A magnetic core includes a metal magnetic powder, which has a large size powder, an intermediate size powder, and a small size powder. A particle size of the large size powder is 10 ?m or more and 60 ?m or less. A particle size of the intermediate size powder is 2.0 ?m or more and less than 10 ?m. A particle size of the small size powder is 0.1 ?m or more and less than 2.0 ?m. The large size powder, the intermediate size powder, and the small size powder have an insulation coating. When A1 represents an average insulation coating thickness of the large size powder, A2 represents an average insulation coating thickness of the intermediate size powder, A3 represents an average insulation coating thickness of the small size powder, A3 is 30 nm or more and 100 nm or less, A3/A1?1.3, and A3/A2?1.0.Type: GrantFiled: October 15, 2021Date of Patent: June 20, 2023Assignee: TDK CORPORATIONInventors: Kyohei Tonoyama, Ken Satoh, Kentaro Saito, Miyuki Asai, Hitoshi Ohkubo
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Patent number: 11657949Abstract: A magnetic core and a coil component with excellent permeability, core loss, DC superimposition property, and withstand voltage. A magnetic core has a metal magnetic powder containing resin including a metal magnetic powder. The metal magnetic powder includes a large size powder, an intermediate size powder, and a small size powder. A particle size of the large size powder is 10 ?m or more and 60 ?m or less. A particle size of the intermediate size powder is 2.0 ?m or more and less than 10 ?m. A particle size of the small size powder is 0.1 ?m or more and less than 2.0 ?m. The large size powder includes a nano crystal. A ratio of the large size powder existing with respect to the metal magnetic powder is 39% or more and 91% or less in terms of an area ratio in a cross section of the magnetic core.Type: GrantFiled: October 25, 2019Date of Patent: May 23, 2023Assignee: TDK CORPORATIONInventors: Kyohei Tonoyama, Ken Satoh, Kentaro Saito, Miyuki Asai, Hitoshi Ohkubo
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Publication number: 20230119388Abstract: In the coil component, the external terminal and the metal magnetic powder-containing resin constituting the element body are not in direct contact with each other, and thus high ESD resistance is obtained. That is, even when a high transient voltage is applied between the pair of external terminals, insulation breakdown is less likely to occur, and an improvement in breakdown voltage with respect to the transient voltage can be realized.Type: ApplicationFiled: October 12, 2022Publication date: April 20, 2023Applicant: TDK CORPORATIONInventors: Shota OTSUKA, Takashi KUDO, Kyohei TONOYAMA, Taiji MATSUI, Ken SATOH, Miyuki ASAI
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Publication number: 20220037068Abstract: A magnetic core includes a metal magnetic powder, which has a large size powder, an intermediate size powder, and a small size powder. A particle size of the large size powder is 10 ?m or more and 60 ?m or less. A particle size of the intermediate size powder is 2.0 ?m or more and less than 10 ?m. A particle size of the small size powder is 0.1 ?m or more and less than 2.0 ?m. The large size powder, the intermediate size powder, and the small size powder have an insulation coating. When A1 represents an average insulation coating thickness of the large size powder, A2 represents an average insulation coating thickness of the intermediate size powder, A3 represents an average insulation coating thickness of the small size powder, A3 is 30 nm or more and 100 nm or less, A3/A1?1.3, and A3/A2?1.0.Type: ApplicationFiled: October 15, 2021Publication date: February 3, 2022Applicant: TDK CORPORATIONInventors: Kyohei TONOYAMA, Ken SATOH, Kentaro SAITO, Miyuki ASAI, Hitoshi OHKUBO
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Patent number: 11183320Abstract: A magnetic core includes a metal magnetic powder, which has a large size powder, an intermediate size powder, and a small size powder. A particle size of the large size powder is 10 ?m or more and 60 ?m or less. A particle size of the intermediate size powder is 2.0 ?m or more and less than 10 ?m. A particle size of the small size powder is 0.1 ?m or more and less than 2.0 ?m. The large size powder, the intermediate size powder, and the small size powder have an insulation coating. When A1 represents an average insulation coating thickness of the large size powder, A2 represents an average insulation coating thickness of the intermediate size powder, A3 represents an average insulation coating thickness of the small size powder, A3 is 30 nm or more and 100 nm or less, A3/A1?1.3, and A3/A2?1.0.Type: GrantFiled: October 25, 2019Date of Patent: November 23, 2021Assignee: TDK CORPORATIONInventors: Kyohei Tonoyama, Ken Satoh, Kentaro Saito, Miyuki Asai, Hitoshi Ohkubo
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Publication number: 20210319944Abstract: To provide a coil device capable of preventing a short circuit between turns of the coil part. A coil device 2 includes a core part 4 including a magnetic powder 41 and a resin 42, and a coil part 6 embedded in the core part 4 and having a wound wire 6a with an insulation coating layer 61.Type: ApplicationFiled: April 14, 2021Publication date: October 14, 2021Applicant: TDK CORPORATIONInventors: Satoshi SUGIMOTO, Kyohei TONOYAMA, Miyuki ASAI, Takamasa IWASAKI
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Publication number: 20210183566Abstract: In a coil component, the pressure resistance is improved by main surfaces and of a main body portion being covered with an insulating layer. The main body portion has a surface part, the resin ratio of the surface part is higher than the internal resin ratio, and insulation is enhanced at the surface part. As a result, the pressure resistance on the surface of the main body portion is further improved and the pressure resistance of the entire coil component is further improved.Type: ApplicationFiled: December 8, 2020Publication date: June 17, 2021Applicant: TDK CORPORATIONInventors: Hitoshi OHKUBO, Miyuki ASAI, Masazumi ARATA, Hokuto EDA
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Patent number: 10943719Abstract: In a coil component, an insulation layer covers an upper surface of a conductor pattern. Accordingly, insulating properties between the conductor pattern and a magnetic body are enhanced, and insulating properties between the conductor patterns are enhanced. In addition, in the coil component, the magnetic body enters a space between resin walls such that the insulation layer is covered. Therefore, a volume of the magnetic body above the conductor pattern is increased, and high coil characteristics are realized.Type: GrantFiled: May 19, 2020Date of Patent: March 9, 2021Assignee: TDK CORPORATIONInventors: Miyuki Asai, Hokuto Eda, Masazumi Arata, Hitoshi Ohkubo
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Publication number: 20200373050Abstract: In a coil component, an insulation layer covers an upper surface of a conductor pattern. Accordingly, insulating properties between the conductor pattern and a magnetic body are enhanced, and insulating properties between the conductor patterns are enhanced. In addition, in the coil component, the magnetic body enters a space between resin walls such that the insulation layer is covered. Therefore, a volume of the magnetic body above the conductor pattern is increased, and high coil characteristics are realized.Type: ApplicationFiled: May 19, 2020Publication date: November 26, 2020Applicant: TDK CORPORATIONInventors: Miyuki ASAI, Hokuto EDA, Masazumi ARATA, Hitoshi OHKUBO
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Publication number: 20200373064Abstract: In a coil component, an uneven structure provided by an insulation layer and a resin wall contributes to extension of a contact area with respect to a magnetic body, so that an adhesive force with respect to the magnetic body is improved. In addition, the magnetic body protrudes downward toward an exposed region of the resin wall corresponding to a recessed portion in the uneven structure, a volume thereof is increased, and coil characteristics such as an inductance value are improved.Type: ApplicationFiled: May 19, 2020Publication date: November 26, 2020Applicant: TDK CORPORATIONInventors: Miyuki ASAI, Hokuto EDA, Masazumi ARATA, Hitoshi OHKUBO
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Publication number: 20200373061Abstract: In a coil component, a second magnetic portion disposed in the vicinity of a coil is designed to have a higher proportion of Fe than a metal magnetic powder-containing resin constituting a first magnetic portion. Therefore, a magnetic flux of the coil flows smoothly. Although the second magnetic portion has a relatively lower withstand voltage than the first magnetic portion, since the second magnetic portion is surrounded by the first magnetic portion, it is not exposed on an outer surface of a magnetic body. For this reason, a situation in which the coil and external terminal electrodes are short-circuited with the second magnetic portion therebetween is effectively curbed, and short-circuiting between the coil and the external terminal electrodes can be curbed.Type: ApplicationFiled: May 19, 2020Publication date: November 26, 2020Applicant: TDK CORPORATIONInventors: Miyuki ASAI, Takahiro KAWAHARA, Masazumi ARATA, Hitoshi OHKUBO
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Publication number: 20200135371Abstract: A magnetic core includes a metal magnetic powder, which has a large size powder, an intermediate size powder, and a small size powder. A particle size of the large size powder is 10 ?m or more and 60 ?m or less. A particle size of the intermediate size powder is 2.0 ?m or more and less than 10 ?m. A particle size of the small size powder is 0.1 ?m or more and less than 2.0 ?m. The large size powder, the intermediate size powder, and the small size powder have an insulation coating. When A1 represents an average insulation coating thickness of the large size powder, A2 represents an average insulation coating thickness of the intermediate size powder, A3 represents an average insulation coating thickness of the small size powder, A3 is 30 nm or more and 100 nm or less, A3/A1?1.3, and A3/A2?1.0.Type: ApplicationFiled: October 25, 2019Publication date: April 30, 2020Applicant: TDK CORPORATIONInventors: Kyohei TONOYAMA, Ken SATOH, Kentaro SAITO, Miyuki ASAI, Hitoshi OHKUBO
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Publication number: 20200135380Abstract: A magnetic core and a coil component with excellent permeability, core loss, DC superimposition property, and withstand voltage. A magnetic core has a metal magnetic powder containing resin including a metal magnetic powder. The metal magnetic powder includes a large size powder, an intermediate size powder, and a small size powder. A particle size of the large size powder is 10 ?m or more and 60 ?m or less. A particle size of the intermediate size powder is 2.0 ?m or more and less than 10 ?m. A particle size of the small size powder is 0.1 ?m or more and less than 2.0 ?m. The large size powder includes a nano crystal. A ratio of the large size powder existing with respect to the metal magnetic powder is 39% or more and 91% or less in terms of an area ratio in a cross section of the magnetic core.Type: ApplicationFiled: October 25, 2019Publication date: April 30, 2020Applicant: TDK CORPORATIONInventors: Kyohei TONOYAMA, Ken SATOH, Kentaro SAITO, Miyuki ASAI, Hitoshi OHKUBO
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Patent number: 8063046Abstract: Compounds having high angiogenesis inhibiting activity useful as agents for effective treatment and prevention of diseases involving pathologic angiogenesis, e.g.Type: GrantFiled: March 23, 2010Date of Patent: November 22, 2011Assignee: Chugai Seiyaku Kabushiki KaishaInventors: Hiroshi Koyano, Atsushi Suda, Kousuke Aso, Kihito Hada, Miyuki Asai, Masami Hasegawa, Yasuko Sato
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Publication number: 20100179326Abstract: Compounds having high angiogenesis inhibiting activity useful as agents for effective treatment and prevention of diseases involving pathologic angiogenesis, e.g.Type: ApplicationFiled: March 23, 2010Publication date: July 15, 2010Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHAInventors: Hiroshi KOYANO, Atsushi Suda, Kousuke Aso, Kihito Hada, Miyuki Asai, Masami Hasegawa, Yasuko Sato
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Patent number: 7705053Abstract: To provide compounds which have high angiogenesis inhibiting activity, and are useful as agents for effective treatment and prevention of diseases involving pathologic angiogenesis, for example, cancer and cancer metastasis, methods for producing the compounds, intermediate compounds useful for their production, and pharmaceutical compositions containing these compounds.Type: GrantFiled: December 27, 2004Date of Patent: April 27, 2010Assignee: Chugai Seiyaku Kabushiki KaishaInventors: Hiroshi Koyano, Atsushi Suda, Kousuke Aso, Kihito Hada, Miyuki Asai, Masami Hasegawa, Yasuko Sato
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Publication number: 20070123493Abstract: To provide compounds which have high angiogenesis inhibiting activity, and are useful as agents for effective treatment and prevention of diseases involving pathologic angiogenesis, for example, cancer and cancer metastasis, methods for producing the compounds, intermediate compounds useful for their production, and pharmaceutical compositions containing these compounds.Type: ApplicationFiled: December 27, 2004Publication date: May 31, 2007Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHAInventors: Hiroshi Koyano, Atsushi Suda, Kousuke Aso, Kihito Hada, Miyuki Asai, Masami Hasegawa, Yasuko Sato