Patents by Inventor Junichi Hamatani
Junichi Hamatani 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: 6876286Abstract: An inductor is constructed to achieve efficient formation of external electrodes, and exhibits high reliability of connection between the external electrodes and an internal conductor, and desired characteristics. In the method of manufacturing the inductor, a magnetic material formed by kneading a magnetic material and a resin is molded to form a magnetic material compact body in which the internal conductor is partially exposed from the external surface thereof, and then the surface of the magnetic material compact body is plated to form the external electrodes including a plated metal film and connected to the internal conductor. The surface of the magnetic material compact body is roughened, and then the external electrodes are formed via plating.Type: GrantFiled: June 13, 2003Date of Patent: April 5, 2005Assignee: Murata Manufacturing Co., Ltd.Inventors: Takashi Shikama, Iwao Fukutani, Junichi Hamatani, Kenichi Saito, Hisato Oshima
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Patent number: 6859994Abstract: A method for manufacturing an inductor is performed in such a manner that the surface of a metal wire provided with an insulating film thereon is coated with a thermal melting resin. The thickness of the thermal melting resin is, for example, approximately 1 ?m. As the thermal melting resin, a thermoplastic resin or a thermosetting resin, such as a polyimide resin or an epoxy resin, containing 85 wt % of a powdered ferrite is used. This coated metal wire is densely wound to form a solenoid-type coil conductor. Next, the thermal melting resin is softened by a heat treatment at, for example, 180° C. and is then solidified by spontaneous cooling. Accordingly, the portions of the coil conductor adjacent to each other are bonded together by the thermal melting resin.Type: GrantFiled: September 10, 2001Date of Patent: March 1, 2005Assignee: Murata Manufacturing Co., Ltd.Inventors: Hisato Oshima, Takeshi Shikama, Junichi Hamatani, Iwao Fukutani, Kenichi Saito
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Patent number: 6751862Abstract: An electronic device containing an electronic element such as a thermistor element is produced first by providing the element with electrodes formed on its two main surfaces facing outward away from each other, at least two terminals and a casing. Each terminal has a contact part for contacting one of the electrodes and an extended part extending from the contact part. The contact part of at least one of the terminals is elastic and bendable. The terminals and the electronic element are inserted into the casing either sequentially or simultaneously as an assembly in any of the ways such that the electrodes on the electronic element are not rubbed directly against the contact parts of the terminals. This may be done by disposing flexible guide plates over the contact parts such that the electrodes will glide over these guide plates as the electronic element is inserted after the terminals are installed inside the casing.Type: GrantFiled: June 29, 2001Date of Patent: June 22, 2004Assignee: Murata Manufacturing Co., Ltd.Inventors: Junichi Hamatani, Satoshi Tsuruhara
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Patent number: 6725525Abstract: A method of manufacturing an inductor includes the step of molding a magnetic material formed by kneading a magnetic material and a resin to form a magnetic material compact body in which the internal conductor is partially exposed from the external surface thereof. Then the surface of the magnetic material compact body is plated to form the external electrodes including a plated metal film and connected to the internal conductor. The surface of the magnetic material compact body is roughened, and then the external electrodes are formed via plating.Type: GrantFiled: August 12, 2000Date of Patent: April 27, 2004Assignee: Murata Manufacturing Co., Ltd.Inventors: Takashi Shikama, Iwao Fukutani, Junichi Hamatani, Kenichi Saito, Hisato Oshima
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Publication number: 20030206089Abstract: An inductor is constructed to achieve efficient formation of external electrodes, and exhibits high reliability of connection between the external electrodes and an internal conductor, and desired characteristics. In the method of manufacturing the inductor, a magnetic material formed by kneading a magnetic material and a resin is molded to form a magnetic material compact body in which the internal conductor is partially exposed from the external surface thereof, and then the surface of the magnetic material compact body is plated to form the external electrodes including a plated metal film and connected to the internal conductor. The surface of the magnetic material compact body is roughened, and then the external electrodes are formed via plating.Type: ApplicationFiled: June 13, 2003Publication date: November 6, 2003Applicant: Murata Manufacturing Co., Ltd.Inventors: Takashi Shikama, Iwao Fukutani, Junichi Hamatani, Kenichi Saito, Hisato Oshima
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Patent number: 6614338Abstract: A inductor is constructed such that at least about two-thirds of a final winding of wire at each end of an internal conductor-coil embedded in a molded magnetic body project from end surfaces of the molded magnetic body by at least about one-fifth of the diameter of the wire. External electrodes are connected with respective portions of the internal conductor-coil, which are exposed at the respective end surfaces of the molded magnetic body.Type: GrantFiled: March 14, 2001Date of Patent: September 2, 2003Assignee: Murata Manufacturing Co., Ltd.Inventors: Junichi Hamatani, Hisato Oshima
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Patent number: 6577218Abstract: An electronic component includes an internal conductor (conductor coil) made of a metal that is embedded in a molded body. The molded body is formed by molding a ferrite resin into a fixed shape, such that at least a portion of the internal conductor is exposed on the surface of the molded body, and external electrodes, which are connected to the internal conductor, are provided in a fixed area, including the exposed portion of the internal conductor, on the surface of the molded body. The electronic component is manufactured by depositing palladium at a density of about 0.5 &mgr;g/cm2 to about 1.5 &mgr;g/cm2 in the area in which the internal conductor is not exposed on the molded body, and at a density of about 0.05 &mgr;g/cm2 to about 0.3 &mgr;g/cm2 on the internal conductor exposed on the surface of the molded body. The external electrodes are formed via a process of forming a metal film (electroless plating film) on the surface of the molded body by conducting electroless plating.Type: GrantFiled: November 1, 2001Date of Patent: June 10, 2003Assignee: Murata Manufacturing Co., Ltd.Inventors: Junichi Hamatani, Hisato Oshima
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Publication number: 20020110958Abstract: An electronic component includes an internal conductor (conductor coil) made of a metal that is embedded in a molded body. The molded body is formed by molding a ferrite resin into a fixed shape, such that at least a portion of the internal conductor is exposed on the surface of the molded body, and external electrodes, which are connected to the internal conductor, are provided in a fixed area, including the exposed portion of the internal conductor, on the surface of the molded body. The electronic component is manufactured by depositing palladium at a density of about 0.5 &mgr;g/cm2 to about 1.5 &mgr;g/cm2 in the area in which the internal conductor is not exposed on the molded body, and at a density of about 0.05 &mgr;g/cm2 to about 0.3 &mgr;g/cm2 on the internal conductor exposed on the surface of the molded body. The external electrodes are formed via a process of forming a metal film (electroless plating film) on the surface of the molded body by conducting electroless plating.Type: ApplicationFiled: November 1, 2001Publication date: August 15, 2002Applicant: Murata Manufacturing Co., Ltd.Inventors: Junichi Hamatani, Hisato Oshima
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Publication number: 20020067232Abstract: An inductor which has a superior shape retaining property of a coil conductor, is superior in mass-productivity, and can be applied to an automated manufacturing line, and a manufacturing method therefor are provided. The surface of a metal wire provided with an insulating film thereon is coated with a thermal melting resin. The thickness of the thermal melting resin is, for example, approximately 1 &mgr;m. As the thermal melting resin, a thermoplastic resin or a thermosetting resin, such as a polyimide resin or an epoxy resin, containing 85 wt % of a powdered ferrite is used. This coated metal wire is densely wound to form a solenoid-type coil conductor. Next, the thermal melting resin is softened by a heat treatment at, for example, 180° C. and is then solidified by spontaneous cooling. Accordingly, the portions of the coil conductor adjacent to each other are bonded together by the thermal melting resin.Type: ApplicationFiled: September 10, 2001Publication date: June 6, 2002Inventors: Hisato Oshima, Takeshi Shikama, Junichi Hamatani, Iwao Fukutani, Kenichi Saito
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Publication number: 20020053967Abstract: A method for efficiently and economically manufacturing an inductor using a resin based magnetic material, and a highly reliable inductor that is manufactured by the method, produces a unique inductor including a molded magnetic material member. An inner conductor is disposed in the molded magnetic material member and is exposed at a surface of the molded magnetic material member.Type: ApplicationFiled: December 31, 2001Publication date: May 9, 2002Applicant: Murata Manufacturing Co., Ltd.Inventors: Takashi Shikama, Iwao Fukutani, Junichi Hamatani, Kenichi Saito, Hisato Oshima
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Patent number: 6373368Abstract: A method for efficiently and economically manufacturing an inductor using a resin based magnetic material, and a highly reliable inductor that is manufactured by the method, produces a unique inductor including a molded magnetic material member. An inner conductor is disposed in the molded magnetic material member and is exposed at a surface of the molded magnetic material member.Type: GrantFiled: September 18, 2000Date of Patent: April 16, 2002Assignee: Murata Manufacturing Co., Ltd.Inventors: Takashi Shikama, Iwao Fukutani, Junichi Hamatani, Kenichi Saito, Hisato Oshima
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Publication number: 20010054233Abstract: An electronic device containing an electronic element such as a thermistor element is produced first by providing the element with electrodes formed on its two main surfaces facing outward away from each other, at least two terminals and a casing. Each terminal has a contact part for contacting one of the electrodes and an extended part extending from the contact part. The contact part of at least one of the terminals is elastic and bendable. The terminals and the electronic element are inserted into the casing either sequentially or simultaneously as an assembly in any of the ways such that the electrodes on the electronic element are not rubbed directly against the contact parts of the terminals. This may be done by disposing flexible guide plates over the contact parts such that the electrodes will glide over these guide plates as the electronic element is inserted after the terminals are installed inside the casing.Type: ApplicationFiled: June 29, 2001Publication date: December 27, 2001Inventors: Junichi Hamatani, Satoshi Tsuruhara
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Publication number: 20010030595Abstract: A inductor is constructed such that at least about two-thirds of a final winding of wire at each end of an internal conductor-coil embedded in a molded magnetic body project from end surfaces of the molded magnetic body by at least about one-fifth of the diameter of the wire. External electrodes are connected with respective portions of the internal conductor-coil, which are exposed at the respective end surfaces of the molded magnetic body.Type: ApplicationFiled: March 14, 2001Publication date: October 18, 2001Inventors: Junichi Hamatani, Hisato Oshima
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Publication number: 20010016978Abstract: An electronic device containing an electronic element such as a thermistor element is produced first by providing the element with electrodes formed on its two main surfaces facing outward away from each other, at least two terminals and a casing. Each terminal has a contact part for contacting one of the electrodes and an extended part extending from the contact part. The contact part of at least one of the terminals is elastic and bendable. The terminals and the electronic element are inserted into the casing either sequentially or simultaneously as an assembly in any of the ways such that the electrodes on the electronic element are not rubbed directly against the contact parts of the terminals. This may be done by disposing flexible guide plates over the contact parts such that the electrodes will glide over these guide plates as the electronic element is inserted after the terminals are installed inside the casing.Type: ApplicationFiled: August 14, 1998Publication date: August 30, 2001Inventors: JUNICHI HAMATANI, SATOSHI TSURUHARA
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Patent number: 5952811Abstract: A device for automatically shutting off a current is used in combination with a motor start-up component incorporated in a motor-driving circuit including an auxiliary coil which operates at a start-up time of a motor and a main coil for its steady-state operation. This motor start-up component includes a motor start-up thermistor with positive temperature characteristic having a first electrode and a second electrode, a first connector member having a first male terminal part and connected to the first electrode and a second connector member having a second male terminal part and connected to the second electrode. The motor start-up thermistor is connected in series to the auxiliary coil through the first electrode.Type: GrantFiled: May 15, 1997Date of Patent: September 14, 1999Assignee: Murata Manufacturing Co., Ltd.Inventor: Junichi Hamatani
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Patent number: 5898289Abstract: A motor start-up circuit is incorporated in a motor-driving circuit provided with an auxiliary coil which operates during a start-up time of the motor and a main coil for a steady-state operation of the motor. The start-up circuit in one form has a start-up thermistor with positive temperature characteristic and a Triac switch connected in series with the auxiliary coil and a triac-controlling thermistor with positive temperature characteristic connected in parallel to the start-up thermistor, and one of the terminals of the triac-controlling thermistor is connected to the gate of the Triac switch. The start-up circuit in another form has a Triac switch connected in series with the auxiliary coil and a triac-controlling thermistor with positive temperature characteristic connected in parallel to the auxiliary coil and the Triac switch and one of the terminals of the triac-controlling thermistor is connected to the gate of the Triac switch.Type: GrantFiled: April 1, 1997Date of Patent: April 27, 1999Assignee: Murata Manufacturing Co., Ltd.Inventor: Junichi Hamatani
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Patent number: 5789897Abstract: A motor-driving circuit includes an auxiliary coil which functions at the time of the start-up of the motor and a main coil for its stead state operation. A component of a start-up circuit to be incorporated in such a motor-driving circuit includes a thermistor with positive temperature characteristic and a Triac switch which are to be connected in series with the auxiliary coil, a case which contains both the thermistor and the Triac switch, and a connector member having a planar contact portion, one of its principal surfaces contacting an electrode of the thermistor and the other of the principal surfaces contacting the inner wall surface of the case. The case may further contain therein another thermistor connected to the gate of the Triac switch for controlling the Triac switch.Type: GrantFiled: April 24, 1997Date of Patent: August 4, 1998Assignee: Murata Manufacturing Co., Ltd.Inventor: Junichi Hamatani