Patents by Inventor Isamu Sato
Isamu Sato 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: 20150217409Abstract: Providing an Ag ball having a low alpha dose and a high sphericity regardless of impurity elements having an amount equal to or more than a predetermined value except for Ag. In order to suppress a soft error and reduce an connection fault, a content of U is equal to or less than 5 ppb, a content of Th is equal to or less than 5 ppb, a purity is equal to or more than 99.9% but equal to or less than 99.9995%, an alpha dose is equal to or less than 0.0200 cph/cm2, a content of either Pb or Bi or a total content of both Pb and Bi is equal to or more than 1 ppm, and a sphericity is equal to or more than 0.90.Type: ApplicationFiled: February 3, 2015Publication date: August 6, 2015Applicant: Senju Metal lndustry Co., Ltd.Inventors: Takashi AKAGAWA, Hiroyoshi KAWASAKI, Kazuhiko MATSUI, Yuichi KOIKEDA, Masaru SASAKI, Hiroyuki YAMASAKI, Takahiro ROPPONGI, Daisuke SOMA, Isamu SATO
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Publication number: 20150209912Abstract: A Cu core ball suppresses a soft error and its alpha dose is low. Its surface roughness does not affect a mounting process. A pure degree of the Cu ball as an internal ball is equal to or larger than 99.9% and equal to or less than 95%. A total contained amount of Pb and/or Bi in impurity contained in the Cu ball is equal to or larger than 1 ppm. Its sphericity is equal to or higher than 0.95. A solder plating film coated on the Cu ball is a Sn solder plating film or a solder plating film comprising a lead free solder alloy whose primary component is Sn. In the solder plating film, a contained amount of U is equal to or less than 5 ppb and that of Th is equal to or less than 5 ppb. A total alpha dose of the Cu ball and the solder plating film is equal to or less than 0.0200 cph/cm2. An arithmetic average roughness of the Cu core ball is equal to or less than 0.3 ?m.Type: ApplicationFiled: January 27, 2015Publication date: July 30, 2015Applicant: Senju Metal lndustry Co., Ltd.Inventors: Hiroyoshi KAWASAKI, Takahiro ROPPONGI, Daisuke SOMA, Isamu SATO
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Publication number: 20150174678Abstract: A hot-dip plating apparatus for plating a thin molten solder film can control a film thickness of a molten solder on a base material evenly and in increments of a few ?m and achieve a thin-film solder plating having a film thickness less than a conventional system. As shown in FIG. 1, this apparatus comprises a solder bath 17 of accommodating the molten solder 7; a second conveying section 23 for drawing up a strip member 31 from the solder bath; and a blower section 19 for blowing hot gas on the strip member 31 immediately after being drawn up from the solder bath by a second conveying section 23; the hot gas having a predetermined flow volume and a predetermined temperature equal to or higher than a melting temperature of the molten solder 7. According to this configuration, the excess molten solder 7 can be trimmed from the strip member 31 corresponding to composition of the molten solder 7.Type: ApplicationFiled: June 10, 2013Publication date: June 25, 2015Inventors: Isamu Sato, Koji Watanabe, Kota Kikuchi, Michio Suzuki, Naoto Kameda, Hideki Nakamura
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Publication number: 20150007958Abstract: Provided is a solder bump forming method that enables micro-solder bumps to be formed without the possibility of occurrence of a bridge due to excess molten solder. An injection head 11 for supplying molten solder has a nozzle 16 brought into contact with a mask with openings that is disposed over a substrate 8. After completing a supply operation, the injection head 11 is forcedly cooled by heat transfer from a cooling unit 13 through a heater unit 12 whose operation has been stopped. Molten solder 15 in the cooled injection head 11 does not drool from the nozzle 16 when the injection head 11 moves up.Type: ApplicationFiled: October 18, 2012Publication date: January 8, 2015Applicant: SENJU METAL INDUSTRY CO., LTD.Inventors: Issaku Sato, Akira Takaguchi, Isamu Sato, Takashi Nauchi
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Patent number: 8680855Abstract: A measuring circuit system in a magnetic field measuring apparatus of the invention has an amplifier and a band-pass filter connected in sequence on an output terminal side of the TMR element, the band-pass filter is a narrow-range band-pass filter such that a peak pass frequency of the filter that is a center is a basic frequency selected from a range of 10 to 40 GHz and a band width centered around the basic frequency is a narrow range of ±0.5 to ±4 GHz; and with the measuring circuit system, an S/N ratio (SNR) of 3 dB or greater is obtained, the SNR being defined by a ratio of an amplitude S of a high-frequency generated signal induced by the TMR element to a total noise N that is a sum of a head noise generated by the TMR element and a circuit noise generated by the amplifier. With such a configuration, an in-plane high-frequency magnetic field generated by a microwave-assisted magnetic head is reliably and precisely measured.Type: GrantFiled: December 26, 2012Date of Patent: March 25, 2014Assignee: TDK CorporationInventors: Isamu Sato, Hiroshi Ikeda, Mikio Matsuzaki, Tetsuya Roppongi, Noboru Yamanaka, Tsutomu Aoyama
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Patent number: 8582239Abstract: A microwave assisted magnetic head includes a main magnetic pole; a trailing shield, a main coil for causing the main magnetic pole to generate a perpendicular recording field, at least one secondary coil for generating an in-plane alternate-current (AC) magnetic field with a frequency in a microwave band from a magnetic recording gap between the main magnetic pole and the trailing shield, nonmagnetic films formed on magnetic recording gap facing surfaces that are defined by the main magnetic pole and the trailing shield, the main magnetic pole and the trailing shield being configured with first soft magnetic films, and second soft magnetic films formed further on the surfaces of the nonmagnetic films. The second soft magnetic films have larger anisotropy fields than the first soft magnetic films have.Type: GrantFiled: June 20, 2012Date of Patent: November 12, 2013Assignee: TDK CorporationInventors: Yoshikazu Soeno, Kei Hirata, Tsutomu Aoyama, Isamu Sato
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Patent number: 8547655Abstract: A magnetic recording method for a recording layer of a magnetic recording medium uses a thin film magnetic head with a sub-coil or a microwave radiator. In the method, a microwave spread spectrum (SS) signal is applied to the sub-coil or the microwave radiator, the microwave SS signal including a ferromagnetic resonant (FMR) frequency of the recording layer as a carrier wave within a band so as to generate an in-plane high-frequency magnetic field so that a magnetization reversal magnetic field Hsw of the recording layer is lowered. The magnetic recording is performed while the magnetization reversal magnetic field Hsw of the recording layer is lowered.Type: GrantFiled: November 16, 2011Date of Patent: October 1, 2013Assignee: TDK CorporationInventors: Tsutomu Aoyama, Hiroshi Ikeda, Isamu Sato
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Patent number: 8434614Abstract: An object of the present invention is to prevent “deteriorations,” such as oxidization and deformation of micro solder spheres during storage. The micro solder spheres are packed in a container 2 comprising an air permeable material. A deoxidizing and drying agent 3 to be disposed externally to the container 2 is provided. The container 2 and the deoxidizing and drying agent 3 are placed in a bag member 4 impermeable to air, and the bag member 4 is sealed in an air-tight condition. Before sealing, the bag member 4 may be air evacuated. A plurality of containers 2 may be held by a holding member 5 such that they are fixed in positions relative to each other.Type: GrantFiled: November 26, 2009Date of Patent: May 7, 2013Assignee: Senju Metal Industry Co., Ltd.Inventors: Isamu Sato, Daisuke Souma, Kazuo Fujikura
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Patent number: 8427773Abstract: An object is to provide a magnetic recording method that demonstrates an additional high assistance effect to magnetic recording by applying an alternate current magnetic field in the in-plane direction to a magnetic recording medium having a large coercive force, and a method of the present invention for magnetic recording using a magnetic recording head to a recording layer of a magnetic recording medium arranged to oppose the magnetic recording head, the magnetic recording head including a main pole, an auxiliary pole, a main coil for generating a perpendicular recording magnetic field to the main pole, and either a sub-coil for generating an in-plane alternate current magnetic field of a microwave band to the main pole or a microwave radiator that is arranged in vicinity of the main pole and that radiates microwaves, the method including: a step for modulating an amplitude of the in-plane alternate current magnetic field by modulating an amplitude of microwave alternating current that is applied to eitherType: GrantFiled: March 23, 2011Date of Patent: April 23, 2013Assignee: TDK CorporationInventors: Tsutomu Aoyama, Isamu Sato
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Patent number: 8358127Abstract: A measuring circuit system in a magnetic field measuring apparatus of the invention has an amplifier and a band-pass filter connected in sequence on an output terminal side of the TMR element, the band-pass filter is a narrow-range band-pass filter such that a peak pass frequency of the filter that is a center is a basic frequency selected from a range of 10 to 40 GHz and a band width centered around the basic frequency is a narrow range of ±0.5 to ±4 GHz; and with the measuring circuit system, an SIN ratio (SNR) of 3 dB or greater is obtained, the SNR being defined by a ratio of an amplitude S of a high-frequency generated signal induced by the TMR element to a total noise N that is a sum of a head noise generated by the TMR element and a circuit noise generated by the amplifier. With such a configuration, an in-plane high-frequency magnetic field generated by a microwave-assisted magnetic head is reliably and precisely measured.Type: GrantFiled: April 7, 2010Date of Patent: January 22, 2013Assignee: TDK CorporationInventors: Isamu Sato, Hiroshi Ikeda, Mikio Matsuzaki, Tetsuya Roppongi, Noboru Yamanaka, Tsutomu Aoyama
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Publication number: 20120320474Abstract: A microwave assisted magnetic head includes a main magnetic pole; a trailing shield, a main coil for causing the main magnetic pole to generate a perpendicular recording field, at least one secondary coil for generating an in-plane alternate-current (AC) magnetic field with a frequency in a microwave band from a magnetic recording gap between the main magnetic pole and the trailing shield, nonmagnetic films formed on magnetic recording gap facing surfaces that are defined by the main magnetic pole and the trailing shield, the main magnetic pole and the trailing shield being configured with first soil magnetic films, and second soft magnetic films formed further on the surfaces of the nonmagnetic films. The second soft magnetic films have larger anisotropy fields than the first soft magnetic films have.Type: ApplicationFiled: June 20, 2012Publication date: December 20, 2012Applicant: TDK CorporationInventors: Yoshikazu Soeno, Kei Hirata, Tsutomu Aoyama, Isamu Sato
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Publication number: 20120301787Abstract: A solid vanadium rechargeable battery, including; a first vanadium compound containing vanadium, whose oxidation number changes between 2 and 3 due to oxidation and reduction reactions, or solid vanadium salt or complex salt including such vanadium, and a surface that becomes a negative electrode; a second vanadium compound containing vanadium, whose oxidation number changes between 5 and 4 due to reduction and oxidation reactions, or solid vanadium salt or complex salt including such vanadium, and a surface that becomes a positive electrode; and a separator sandwiched between the first and the second vanadium compounds for selectively allowing ions to pass through, is provided.Type: ApplicationFiled: October 20, 2010Publication date: November 29, 2012Applicant: TOHOKU UNIVERSITYInventors: Tomoo Yamamura, Xiongwei Wu, Isamu Sato, Hiroki Sakuraba, Kenji Shirasaki, Suguru Ohta
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Patent number: 8300346Abstract: A gap between a main pole and auxiliary pole composing a thin film magnetic head having a microwave assisted function of the present invention is filled with a nonmagnetic dielectric layer to embed a microwave radiator. The nonmagnetic dielectric layer has an inclined surface at a end on a side of an opposing medium surface by which the microwave radiated from the microwave radiator to be bent toward the main pole, whereby the microwave magnetic field generated from the microwave generator can be gathered immediately below the main pole, further improving the microwave assisted effect.Type: GrantFiled: March 31, 2010Date of Patent: October 30, 2012Assignee: TDK CorporationInventors: Hiroshi Ikeda, Isamu Sato, Kiyoshi Noguchi, Tsutomu Aoyama, Takuya Adachi
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Publication number: 20120243117Abstract: An object is to provide a magnetic recording method that demonstrates an additional high assistance effect to magnetic recording by applying an alternate current magnetic field in the in-plane direction to a magnetic recording medium having a large coercive force, and a method of the present invention for magnetic recording using a magnetic recording head to a recording layer of a magnetic recording medium arranged to oppose the magnetic recording head, the magnetic recording head including a main pole, an auxiliary pole, a main coil for generating a perpendicular recording magnetic field to the main pole, and either a sub-coil for generating an in-plane alternate current magnetic field of a microwave band to the main pole or a microwave radiator that is arranged in vicinity of the main pole and that radiates microwaves, the method including: a step for modulating an amplitude of the in-plane alternate current magnetic field by modulating an amplitude of microwave alternating current that is applied to eitherType: ApplicationFiled: March 23, 2011Publication date: September 27, 2012Applicant: TDK CORPORATIONInventors: Tsutomu Aoyama, Isamu Sato
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Publication number: 20120230167Abstract: A microwave assisted magnetic head of the present invention includes: at least two or more auxiliary coils that are arranged in a periphery of a writing main pole; and microwave current supply means that applies microwave currents to the at least two or more auxiliary coils. The at least two or more auxiliary coils respectively include linear body parts linearly arranged on an ABS side, two of the linear body parts of the at least two or more auxiliary coils are arranged in a substantially orthogonal positional relationship, and the microwave current supply means is configured such that the microwave current supply means changes phase differences of the microwave currents applied respectively to the at least two or more auxiliary coils. Therefore, the microwave current can be easily controlled, and thus, a circularly polarized magnetic field with high magnetization inversion efficiency can be generated as an assistance magnetic field.Type: ApplicationFiled: March 11, 2011Publication date: September 13, 2012Applicant: TDK CORPORATIONInventors: Tsutomu AOYAMA, Tetsuya Roppongi, Yoshikazu Soeno, Kiyoshi Noguchi, Isamu Sato
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Patent number: 8264916Abstract: A microwave assisted magnetic head of the present invention includes: at least two or more auxiliary coils that are arranged in a periphery of a writing main pole; and microwave current supply means that applies microwave currents to the at least two or more auxiliary coils. The at least two or more auxiliary coils respectively include linear body parts linearly arranged on an ABS side, two of the linear body parts of the at least two or more auxiliary coils are arranged in a substantially orthogonal positional relationship, and the microwave current supply means is configured such that the microwave current supply means changes phase differences of the microwave currents applied respectively to the at least two or more auxiliary coils. Therefore, the microwave current can be easily controlled, and thus, a circularly polarized magnetic field with high magnetization inversion efficiency can be generated as an assistance magnetic field.Type: GrantFiled: March 11, 2011Date of Patent: September 11, 2012Assignee: TDK CorporationInventors: Tsutomu Aoyama, Tetsuya Roppongi, Yoshikazu Soeno, Kiyoshi Noguchi, Isamu Sato
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Publication number: 20120127610Abstract: A magnetic recording method for a recording layer of a magnetic recording medium uses a thin film magnetic head with a sub-coil or a microwave radiator. In the method, a microwave spread spectrum (SS) signal is applied to the sub-coil or the microwave radiator, the microwave SS signal including a ferromagnetic resonant (FMR) frequency of the recording layer as a carrier wave within a band so as to generate an in-plane high-frequency magnetic field so that a magnetization reversal magnetic field Hsw of the recording layer is lowered. The magnetic recording is performed while the magnetization reversal magnetic field Hsw of the recording layer is lowered.Type: ApplicationFiled: November 16, 2011Publication date: May 24, 2012Applicant: TDK CORPORATIONInventors: Tsutomu AOYAMA, Hiroshi Ikeda, Isamu Sato
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Patent number: 8184395Abstract: A magnetic recording and reproducing apparatus includes a metal housing, a magnetic recording medium having a magnetic recording layer, and a thin-film magnetic head having a write magnetic field production unit and a resonance magnetic field production unit. The apparatus further includes a write signal generation unit for generating the write signal, a microwave signal generation unit for generating the microwave excitation signal, a transmission unit for feeding the microwave excitation signal to the resonance magnetic field production unit and for feeding the write signal to the write magnetic field production unit, and a plurality of metal ribs, arranged in the metal housing, for forming a plurality of cavities. Each of the plurality of cavities having a rectangular horizontal section shape and having dimensions to produce no resonance at a frequency of the microwave excitation signal.Type: GrantFiled: May 21, 2009Date of Patent: May 22, 2012Assignee: TDK CorporationInventors: Hiroshi Ikeda, Saori Kajihara, Kiyoshi Noguchi, Isamu Sato
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Patent number: 8174937Abstract: A thin-film magnetic head having microwave magnetic exciting function includes a write magnetic field production means for producing, in response to a write signal, a write magnetic field to be applied into a magnetic recording medium, and at least line conductor of a microwave radiator of a plane-structure type, formed independent from the write magnetic field production means, for radiating, by feeding there through a microwave excitation current, a microwave band resonance magnetic field with a frequency equal to or in a range near a ferromagnetic resonance frequency FR of the magnetic recording medium.Type: GrantFiled: August 31, 2009Date of Patent: May 8, 2012Assignee: TDK CorporationInventors: Hiroshi Ikeda, Kiyoshi Noguchi, Saori Kajihara, Isamu Sato
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Patent number: D719473Type: GrantFiled: April 5, 2013Date of Patent: December 16, 2014Assignee: Life Technologies CorporationInventors: Jason Dallwig, Kristina Remple, Isamu Sato, Laurel Stone, Adam Zahner