Patents by Inventor Kazuo Yamazaki
Kazuo Yamazaki 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: 20110012500Abstract: A spark plug comprising: a cylindrical metal shell; a cylindrical insulator provided in an inner hole of said metal shell; a center electrode provided in a leading end side inner hole of said insulator; and a ground electrode having one end bonded to a leading end side of said metal shell and having another end face forming a spark discharge gap with said center electrode, wherein said ground electrode comprises an electrode material containing from 0.5 to 1.5 wt. % of Si, from 0.5 to 1.5 wt. % of Al, from 0.02 to 1.0 wt. % of at least one of Ti, V, Zr, Nb and Hf, from 0.03 to 0.09 wt. % of C and 95.5 wt. % or more of Ni, and having a specific resistance at 20° C. of 25 tincm or less.Type: ApplicationFiled: September 23, 2010Publication date: January 20, 2011Applicants: NGK SPARK PLUG CO., LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kenichi KUMAGAI, Teruyuki KONDO, Kozo AMANO, Kazuo YAMAZAKI, Yoshihiro NAKAI, Masatada NUMANO
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Publication number: 20100314945Abstract: Provided is a bidirectional converter which has flexibility to be applicable in various conditions and performs stable switching of operation mode at high efficiency. An electronic device which supplies power in various conditions and operates with excellent efficiency is also provided. An electronic device is provided with a bidirectional converter, which has a reactor and four switches between power supply input terminals and a secondary battery, and a system circuit is supplied with an operation voltage through the bidirectional converter. A status signal indicating the operation status of the system circuit is transmitted to a microcomputer of the bidirectional converter, and based on the status signal, switching of operation mode of the bidirectional converter is controlled.Type: ApplicationFiled: July 30, 2007Publication date: December 16, 2010Applicant: MITSUMI ELECTRIC CO., LTD.Inventors: Kazuo Yamazaki, Yukihiro Terada, Hidenori Tanaka, Tamiji Nagai, Toshio Nagai
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Publication number: 20100308778Abstract: Provided is an electronic system wherein power is accurately supplied even with a power delivery line resistance and a connector contact resistance, and furthermore, a plurality of electronic devices having requiring different power supply voltages can be handled with one power supply device. The electronic system is provided with an electronic device (50), and a power supply device (10) which is arranged to be connected/removed to and from the electronic device (50) and supplies power through a cable when connected. The electronic device (50) is provided with a first detection circuit (51) for performing detection relating to the supply amount of the power supply and outputting a first detection signal, and a control signal terminal.Type: ApplicationFiled: August 28, 2007Publication date: December 9, 2010Inventors: Kazuo Yamazaki, Yukihiro Terada, Kouji Murakami, Tamiji Nagai, Toshio Nagai
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Patent number: 7830675Abstract: To reduce power loss during standby. In a switching power supply device using a first power supply circuit (11) having a small output and a second power supply circuit (12) having a large output, the first power supply circuit (11) is continuously kept in an operating state and the second power supply circuit (12) is started by using an electric power generated in the first power supply circuit (11).Type: GrantFiled: November 27, 2006Date of Patent: November 9, 2010Assignee: Mitsumi Electric Co., Ltd.Inventors: Tamiji Nagai, Toshio Nagai, legal representative, Kazuo Yamazaki
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Patent number: 7825571Abstract: A spark plug comprising: a cylindrical metal shell; a cylindrical insulator provided in an inner hole of said metal shell; a center electrode provided in a leading end side inner hole of said insulator; and a ground electrode having one end bonded to a leading end side of said metal shell and having another end face forming a spark discharge gap with said center electrode, wherein said ground electrode comprises an electrode material containing from 0.5 to 1.5 wt. % of Si, from 0.5 to 1.5 wt. % of Al, from 0.02 to 1.0 wt. % of at least one of Ti, V, Zr, Nb and Hf, from 0.03 to 0.09 wt. % of C and 95.5 wt. % or more of Ni, and having a specific resistance at 20° C. of 25 ??cm or less.Type: GrantFiled: January 30, 2006Date of Patent: November 2, 2010Assignees: NGK Spark Plug Co., Ltd., Sumitomo Electric Industries, Ltd.Inventors: Kenichi Kumagai, Teruyuki Kondo, Kozo Amano, Kazuo Yamazaki, Yoshihiro Nakai, Masatada Numano
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Publication number: 20100273325Abstract: A method of manufacturing a semiconductor device may include, but is not limited to the following processes. A mask layer is formed over a gate electrode portion and a wiring portion adjacent to the gate electrode portion. The mask layer includes a first portion covering the wiring portion. Then, at least a part of the first portion is removed.Type: ApplicationFiled: April 19, 2010Publication date: October 28, 2010Applicant: ELPIDA MEMORY, INC.Inventor: Kazuo YAMAZAKI
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Patent number: 7816755Abstract: A pixel space is narrowed without increasing PN junction capacitance. A photoelectric conversion device includes a plurality of pixels arranged therein, each including a first impurity region of a first conductivity type forming a photoelectric conversion region, a second impurity region of a second conductivity type forming a signal acquisition region arranged in the first impurity region, a third impurity region of the first conductivity type and a fourth impurity region of the first conductivity type are arranged in a periphery of each pixel for isolating the each pixel, the fourth impurity region is disposed between adjacent pixels, and an impurity concentration of the fourth impurity region is smaller than an impurity concentration of the third impurity region.Type: GrantFiled: August 4, 2008Date of Patent: October 19, 2010Assignee: Canon Kabushiki KaishaInventors: Kazuo Yamazaki, Tetsunobu Kochi
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Publication number: 20100188051Abstract: The present invention provides a highly safe charging circuit with which overcharge of a secondary battery will never occur even when a failure occurs in a transistor or the like that controls the charging voltage or charging current or when a protection circuit does not operate normally. In a secondary battery charging circuit 4 that charges a secondary battery E2 with an input power source voltage, the power source voltage is set to a voltage (e.g. 4.0 V) that is lower than the full-charge voltage (e.g. 4.2 V) of the secondary battery. When the voltage of the secondary battery E2 is lower than the power source voltage, a constant current circuit operates to perform constant current charging without voltage step-up, and when the voltage of the secondary battery E2 is higher than the power source voltage and lower than the full-charge voltage, a voltage step-up circuit operates to perform constant current charging with voltage step-up.Type: ApplicationFiled: June 13, 2007Publication date: July 29, 2010Applicant: MITSUMI ELECTRIC CO; LTD.Inventors: Kazuo Yamazaki, Hidenori Tanaka, Yukihiro Terada, Tamiji Nagai, Toshio Nagai
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Publication number: 20100149394Abstract: It is an object of the present invention to provide a solid-state imaging apparatus that outputs digital signals at high speed. A solid-state imaging apparatus is provided that includes plural analog-to-digital converters that convert analog signals obtained by photoelectric conversion into digital signals, plural digital memories that store the digital signals converted by the analog-to-digital converters, plural block digital output lines that are provided to correspond to blocks of the plural digital memories and to which the digital signals stored in the plural digital memories included in the blocks are output, a common digital output line that outputs the digital signals output from the plural block digital output lines, buffer circuits that buffer the digital signals output from the block digital output lines, and block selecting units that can switch the block digital output lines electrically connected to the common digital output line.Type: ApplicationFiled: December 1, 2009Publication date: June 17, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Kazuo Yamazaki, Hiroki Hiyama, Masaaki Iwane
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Publication number: 20100135048Abstract: To reduce power loss during standby. In a switching power supply device using a first power supply circuit (11) having a small output and a second power supply circuit (12) having a large output, the first power supply circuit (11) is continuously kept in an operating state and the second power supply circuit (12) is started by using an electric power generated in the first power supply circuit (11).Type: ApplicationFiled: November 27, 2006Publication date: June 3, 2010Applicant: Mitsumi Electric Company., Ltd.Inventors: Tamiji Nagai, Toshio Nagai, Kazuo Yamazaki
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Publication number: 20100127676Abstract: Disclosed is a power source apparatus including: a connector for outputting electric power, wherein the apparatus performs power output through a cable connected to the connector, a power source circuit capable of changing an output thereof; a control circuit to perform output control of the power source circuit; and a first detection circuit including an input terminal for detection connected to wiring on a side of a tip of the cable to perform detection pertaining to an output quantity of electric power, wherein the output control is performed based on a detection signal of the first detection circuit, the detection signal fed back to the control circuit.Type: ApplicationFiled: August 28, 2007Publication date: May 27, 2010Applicant: Mitsumi Electric Co. Ltd.Inventors: Kazuo Yamazaki, Yukihiro Terada, Kouji Murakami, Tamiji Nagai, Toshio Nagai
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Publication number: 20100110257Abstract: An apparatus includes a pixel array in which pixels for outputting an analog signal are arranged in a matrix, vertical output lines each of which is connected to pixels in a same column, A/D conversion units, which are individually connected to the vertical output lines, for converting the analog signal into a digital signal, and a constant current supply unit for supplying a constant current to the A/D conversion units. Each of the A/D conversion units includes an integration unit for integrating the constant current, a comparison unit for comparing the integrated constant current with the analog signal and outputting a comparison signal, and a digital signal storage unit for storing a digital signal corresponding to the comparison signal. The integration unit includes an input capacitor for receiving the constant current. The comparison unit is connected to the constant current supply unit via the input capacitor.Type: ApplicationFiled: October 28, 2009Publication date: May 6, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Hiroki Hiyama, Masaaki Iwane, Kazuo Yamazaki
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Publication number: 20100013371Abstract: An electrode member for a cold cathode fluorescent lamp which is excellent in sputtering resistance and a discharge property, and which is excellent in productivity, a method of producing the electrode member, and a cold cathode fluorescent lamp are provided. A cold cathode fluorescent lamp 1 includes a glass tube 20 and electrode members 10 arranged in the tube 20. Each of the electrode members 10 includes an electrode main body portion 11 having a bottomed tubular shape and a lead portion 12 arranged at a sealing portion of the glass tube 20, and the portions 11 and 12 are integrally formed. The electrode members 10 contain at least one type of element selected from Ti, Hf, Zr, V, Nb, Mo, W, Sr, Ba, B, Th, Al, Y, Mg, In, Ca, Sc, Ga, Ge, Ag, Rh, Ta, and rare earth elements (other than Y and Sc) in a total amount in the range of 0.01 to 5.0 percent by mass, and the balance composed of a Fe—Ni alloy and impurities.Type: ApplicationFiled: November 22, 2007Publication date: January 21, 2010Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD, SUMIDEN FINE CONDUCTORS CO., LTDInventors: Yoshihiro Nakai, Kazuo Yamazaki
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Publication number: 20100013442Abstract: Provided is a charging system wherein a voltage and a current can be accurately supplied from a power supply device even with a cable wiring resistance and a connector contact resistance, and the power supply device can be commonly used even for a plurality of kinds of electronic circuit devices whereupon different secondary cells are mounted. The charging system is provided with an electronic circuit device (50) having a secondary cell (E2), and a power supply device (10) which can be connected/removed to and from the electronic circuit device and supplies power for charging the secondary cell when connected. In the charging system, a detection signal for charge control is transmitted from the electronic circuit device (50) to the power supply device (10), and the control circuit (12) controls output from an SW power supply circuit (11) based on the detection signal.Type: ApplicationFiled: August 28, 2007Publication date: January 21, 2010Applicant: Mitsumi Electric Co., Ltd.Inventors: Kazuo Yamazaki, Yukihiro Terada, Toshio Nagai
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Publication number: 20090286396Abstract: A DRAM device includes a contact plug in contact with a diffused region of a semiconductor substrate, and a via-plug in contact with top of the contact plug. The through-hole receiving the via-plug has stepped structure including a tapered upper portion formed by an anisotropic dry etching and a larger-diameter lower portion formed by an isotropic etching. The top of the contact plug has a diameter larger than the diameter of the bottom of the lower portion of the via-plug.Type: ApplicationFiled: July 31, 2009Publication date: November 19, 2009Applicant: ELPIDA MEMORY, INC.Inventor: Kazuo YAMAZAKI
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Publication number: 20090256936Abstract: When a horizontal skipping operation is performed in a solid-state imaging apparatus that includes an A/D converting circuit in each column and that applies an arithmetic operation process to a digitalized signal and an arithmetic operation is performed with signals held by a plurality of register circuits, A/D converters and register circuits in columns in which signals are skipped, or not read out, are not involved in the operations. A more consideration is needed in terms of the use efficiency of circuits. A unit for connecting a register circuit of a certain column and a register circuit of a different column is arranged.Type: ApplicationFiled: April 8, 2009Publication date: October 15, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Kazuhiro Sonoda, Kazuo Yamazaki, Shintaro Takenaka
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Publication number: 20090184353Abstract: To prevent two contacts that have different heights, share at least one interlayer insulating film and are disposed close to each other from being short-circuited to each other due to misalignment thereof, a semiconductor device according to the invention has a recess in an interlayer insulating film in which a first contact hiving a lower height, the recess being formed by the upper surface of the first contact, and a silicon nitride sidewall is formed in the recess to extend from the upper surface of the first contact and along the side surface of the recess.Type: ApplicationFiled: January 21, 2009Publication date: July 23, 2009Applicant: ELPIDA MEMORY, INC.Inventor: Kazuo YAMAZAKI
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Publication number: 20090128001Abstract: A cold-cathode fluorescent lamp having high brightness with long life and an electrode for this lamp are offered. The electrode comprises a base and a covering layer that covers the surface of the base. The base is formed of one metal selected from nickel, a nickel alloy, iron, and an iron alloy. Consequently, a base having a shape, such as a cup, can be easily produced. The covering layer comprises (a) a surface layer made of tungsten or molybdenum and (b) a bonding layer that is made of zinc alloy and that is placed between the base and the surface layer. In comparison with nickel and iron, tungsten and molybdenum are resistant to sputtering, have a small work function, and have a high melting point. The presence of the bonding layer enables sufficient bonding between the surface layer and base. A cold-cathode fluorescent lamp provided with the foregoing electrode can suppress the reduction in brightness and the consumption of the electrode. Therefore, it has high brightness and long life.Type: ApplicationFiled: March 15, 2007Publication date: May 21, 2009Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMIDEN FINE CONDUCTORS, CO., LTD.Inventors: Koji Nitta, Shinji Inazawa, Akihisa Hosoe, Kazuo Yamazaki, Hisashi Tokuda
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Publication number: 20090108731Abstract: A cold-cathode fluorescent lamp having high brightness with long life and an electrode for this lamp are offered. At least one part of the electrode surface is formed by using one material selected from the group consisting of rhodium, palladium, and alloys of these. For example, a surface layer made of the foregoing material is formed on a base. To increase the bonding strength between the surface layer and the base, a bonding layer made of gold or gold alloy is formed on the base. Because a metal such as rhodium is resistant to alloying with mercury and has a high melting point, a cold-cathode fluorescent lamp provided with an electrode made of the foregoing metal can suppress not only the consumption of the mercury due to the formation of an amalgam but also the reduction in brightness due to insufficient discharging. Furthermore, because the lamp can suppress the consumption of the mercury and electrode, the lamp has long life.Type: ApplicationFiled: March 15, 2007Publication date: April 30, 2009Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMIDEN FINE CONDUCTORS, CO., LTD.Inventors: Koji Nitta, Shinji Inazawa, Akihisa Hosoe, Kazuo Yamazaki, Hisashi Tokuda
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Publication number: 20090050993Abstract: A pixel space is narrowed without increasing PN junction capacitance. A photoelectric conversion device includes a plurality of pixels arranged therein, each including a first impurity region of a first conductivity type forming a photoelectric conversion region, a second impurity region of a second conductivity type forming a signal acquisition region arranged in the first impurity region, a third impurity region of the first conductivity type and a fourth impurity region of the first conductivity type are arranged in a periphery of each pixel for isolating the each pixel, the fourth impurity region is disposed between adjacent pixels, and an impurity concentration of the fourth impurity region is smaller than an impurity concentration of the third impurity region.Type: ApplicationFiled: August 4, 2008Publication date: February 26, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Kazuo Yamazaki, Tetsunobu Kochi