Patents by Inventor Takahiro Hirai
Takahiro Hirai 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).
-
Publication number: 20110216576Abstract: According to one embodiment, an information recording/reproducing device includes a recording layer and a driver section. The recording layer has a first layer including a first compound. The first compound includes a mixed crystal of a first oxide containing a first metallic element and a second oxide. The second oxide has a crystal structure being same as the first oxide and contains a second metallic element different from the first metallic element. The driver section is configured to produce state change in the recording layer to record information by at least one of application of voltage to the recording layer and passage of current to the recording layer. Composition ratio of an element having a smaller ionic radius of the first and second metallic elements is not less than percolation threshold of a lattice formed of ions of the first and second metallic elements based on the crystal structure.Type: ApplicationFiled: March 9, 2011Publication date: September 8, 2011Applicant: Kabushiki Kaisha ToshibaInventors: Shinya Aoki, Kohichi Kubo, Takayuki Tsukamoto, Takahiro Hirai, Chikayoshi Kamata, Tsukasa Nakai
-
Patent number: 8014189Abstract: An information recording/reproducing device includes a recording layer, and a recording circuit which records data to the recording layer by generating a phase change in the recording layer. The recording layer includes a first chemical compound having a spinel structure. The recording layer is AxMyX4 (0.1?x?2.2, 1.0?y?2.0), where A includes one selected from a group of Zn, Cd and Hg, M includes one selected from a group of Cr, Mo, W, Mn and Re, and X includes O.Type: GrantFiled: December 11, 2009Date of Patent: September 6, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Takayuki Tsukamoto, Kohichi Kubo, Chikayoshi Kamata, Takahiro Hirai, Shinya Aoki, Toshiro Hiraoka
-
Patent number: 8002852Abstract: A method of dyeing a lens, comprises the steps of: (a) applying a dyeing ink containing a sublimable dye onto a base material to produce a dyeing base body; (b) placing the dyeing base body and the lens so that a dye-applied surface of the dyeing base body and a surface of the lens to be dyed face each other in noncontact relation, and heating the dyeing base body under substantially a vacuum condition to sublimate and deposit the applied dye on the lens; and (c) heating the dye deposited surface of the lens by irradiation of infrared rays from one direction to fix the deposited dye on the lens.Type: GrantFiled: May 7, 2008Date of Patent: August 23, 2011Assignee: Nidek Co., Ltd.Inventors: Minoru Inuzuka, Takahiro Hirai
-
Patent number: 7995382Abstract: An information recording and reproducing apparatus, includes: a recording layer including a first layer including a first compound, the first compound being a conjugated compound including at least two types of cation elements, at least one selected from the cation elements being a transition element having a d orbit incompletely filled by electrons, a shortest distance between adjacent cation elements being not more than 0.32 nm; a voltage application unit that applies a voltage to the recording layer, produces a phase change in the recording layer, and records information; an electrode layer that applies a voltage to the recording layer; and an orientation control layer provided between the recording layer and the electrode layer to control an orientation of the recording layer.Type: GrantFiled: December 11, 2009Date of Patent: August 9, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Takayuki Tsukamoto, Kohichi Kubo, Chikayoshi Kamata, Takahiro Hirai, Shinya Aoki, Toshiro Hiraoka
-
Publication number: 20110170333Abstract: A data read/write device according to an example of the present invention includes a recording layer, and means for applying a voltage to the recording layer, generating a resistance change in the recording layer, and recording data. The recording layer is composed of a composite compound having at least two types of cation elements, at least one type of the cation element is a transition element having a “d” orbit in which electrons have been incompletely filled, and the shortest distance between the adjacent cation elements is 0.32 nm or less.Type: ApplicationFiled: March 21, 2011Publication date: July 14, 2011Inventors: Koichi KUBO, Takahiro Hirai, Shinya Aoki, Robin Carter, Chikayoshi Kamata
-
Patent number: 7961586Abstract: An information recording/reproducing device according to an example of the present invention includes first and second heads, a recording medium having a data area from which recording data is read by the first head and a servo burst area from which a servo burst signal is read by the second head, a driver which performs positioning of the second head based on the servo burst signal, and a resistor which covers a surface of the servo burst area and does not cover a surface of the data area. The recording data and the servo burst signal are recorded by a pulse signal.Type: GrantFiled: August 24, 2007Date of Patent: June 14, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Kohichi Kubo, Takahiro Hirai, Shinya Aoki, Akihiro Koga, Junichi Akiyama, Shinji Takakura, Hiroaki Nakamura
-
Patent number: 7936587Abstract: A data read/write device according to an example of the present invention includes a recording layer, and means for applying a voltage to the recording layer, generating a resistance change in the recording layer, and recording data. The recording layer is composed of a composite compound having at least two types of cation elements, at least one type of the cation element is a transition element having a “d” orbit in which electrons have been incompletely filled, and the shortest distance between the adjacent cation elements is 0.32 nm or less.Type: GrantFiled: April 19, 2010Date of Patent: May 3, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Koichi Kubo, Takahiro Hirai, Shinya Aoki, Robin Carter, Chikayoshi Kamata
-
Patent number: 7924678Abstract: A recording/reproducing head includes a laminated body facing to a recording medium, the body including a first conductive layer, a first insulating layer and a second conductive layer which are sequentially stacked. The first conductive layer generates electrons and injects the electrons into the recording medium through the first insulating layer.Type: GrantFiled: July 31, 2006Date of Patent: April 12, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Koichi Kubo, Hiroshi Watanabe, Katsuyuki Naito, Takahiro Hirai
-
Publication number: 20110062407Abstract: According to one embodiment, an information recording and reproducing device includes a recording layer which includes a typical element and a transition element, and stores a state of a first electric resistivity and a state of a second electric resistivity different from the first electric resistivity by a movement of the typical element, and an electrode layer which is disposed at one end of the recording layer to apply a voltage or a current to the recording layer. The recording layer includes a first region which is in contact with the electrode layer and the electrode layer includes a second region which is in contact with the recording layer. The first and second regions are opposite to each other. And the first and second regions include the typical element, and a concentration of the typical element in the first region is higher than that in the second region.Type: ApplicationFiled: September 17, 2010Publication date: March 17, 2011Inventors: Chikayoshi KAMATA, Takayuki Tsukamoto, Takeshi Yamaguchi, Tsukasa Nakai, Takahiro Hirai, Shinya Aoki, Kohichi Kubo
-
Publication number: 20110062405Abstract: According to one embodiment, an information recording and reproducing device includes a first layer, a second layer, and a recording layer between the first and second layers, which is capable of a transition between a first state of a low resistance and a second state of a high resistance by flowing a current between the first and second layers. A peripheral portion of the recording layer has a composition different from that of a center portion of the recording layer. The center portion includes two kinds of cation elements. And the center portion is different from the peripheral portion in a ratio of the two kinds of cation elements.Type: ApplicationFiled: September 24, 2010Publication date: March 17, 2011Inventors: Takayuki Tsukamoto, Chikayoshi Kamata, Takeshi Yamaguchi, Takahiro Hirai, Shinya Aoki, Kohichi Kubo
-
Publication number: 20110031459Abstract: According to one embodiment, an information recording and reproducing device includes a first layer, a second layer and a recording layer. The recording layer is provided between the first layer and the second layer and being capable of reversibly changing between a first state having a first resistance and a second state having a second resistance higher than the first resistance. The recording layer includes a first compound layer and a second compound layer. The first compound layer contains a first compound. The first compound includes a first cation element and a second cation element of a type different from the first cation element. The second compound layer contains a second compound. The second compound includes a transition element having a d-orbital partially filled with electron, and the second compound includes a void site capable of storing at least one of the first cation element and the second cation element.Type: ApplicationFiled: September 20, 2010Publication date: February 10, 2011Applicant: Kabushiki Kaisha ToshibaInventors: Kohichi KUBO, Chikayoshi Kamata, Takayuki Tsukamoto, Shinya Aoki, Takahiro Hirai, Tsukasa Nakai, Toshiro Hiraoka
-
Publication number: 20110026294Abstract: According to one embodiment, an information recording and reproducing device includes a first layer, a second layer and a recording layer. The recording layer is provided between the first and second layers and is capable of reversibly transitioning between a first state and a second state with a resistance higher than in the first state. One of the first and second layers includes a resistivity distribution layer perpendicular to a stacking direction of the first and second layers, and the recording layer. The resistivity distribution layer includes a low and a high resistivity portion. Resistivity of the high resistivity portion is higher than resistivity of the low resistivity portion. The low resistivity portion contains a transition element identical to a transition element contained in the high resistivity portion.Type: ApplicationFiled: September 20, 2010Publication date: February 3, 2011Applicant: Kabushiki Kaisha ToshibaInventors: Takayuki Tsukamoto, Takeshi Yamaguchi, Chikayoshi Kamata, Tsukasa Nakai, Takahiro Hirai, Shinya Aoki, Kohichi Kubo
-
Publication number: 20110024713Abstract: According to one embodiment, a nonvolatile memory device includes a stacked body including a first layer, a second layer and a recording layer. The recording layer is provided between the first layer and the second layer. The recording layer is capable of reversibly changing between a first state and a second state having a resistance higher than a resistance in the first state by a current supplied via the first layer and the second layer. The recording layer includes a first portion and a second portion provided in a plane of a major surface of the recording layer. The second portion has a nitrogen amount higher than a nitrogen amount in the first portion.Type: ApplicationFiled: August 18, 2010Publication date: February 3, 2011Applicant: Kabushiki Kaisha ToshibaInventors: Chikayoshi KAMATA, Takayuki Tsukamoto, Kohichi Kubo, Shinya Aoki, Takahiro Hirai, Toshiro Hiraoka
-
Publication number: 20110006277Abstract: According to one embodiment, an information recording and reproducing device includes a first layer, a second layer and a recording layer. The recording layer is provided between the first layer and the second layer and being capable of reversibly changing between a first state having a first resistance and a second state having a second resistance higher than the first resistance by a current supplied via the first layer and the second layer. The recording layer includes a first compound layer and an insulating layer. The first compound layer contains a first compound. The first compound includes a first cation element and a second cation element of a type different from the first cation element. The insulating layer contains a third compound, and the third compound includes an element selected from group 1 to 4 elements and group 12 to 17 elements in the periodic table.Type: ApplicationFiled: September 20, 2010Publication date: January 13, 2011Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kohichi KUBO, Chikayoshi KAMATA, Takayuki TSUKAMOTO, Shinya AOKI, Takahiro HIRAI, Tsukasa NAKAI, Toshiro HIRAOKA
-
Publication number: 20100316831Abstract: According to one embodiment, an information recording and reproducing device includes a resistive layer directly or indirectly added to a recording layer and having electric resistivity larger than electric resistivity in the low-resistance state of the recording layer. A first compound contained in the recording layer comprises a composite compound includes two or more kinds of cationic elements, at least one of the two or more kinds of cationic elements is a transition element having a d orbit filled incompletely with electrons, a shortest distance between cationic elements adjacent to each other is 0.32 nm or less.Type: ApplicationFiled: August 20, 2010Publication date: December 16, 2010Inventors: Kohichi Kubo, Chikayoshi Kamata, Takayuki Tsukamoto, Shinya Aoki, Takahiro Hirai, Toshiro Hiraoka
-
Patent number: 7852739Abstract: A probe memory device carries out positioning with the use of a servo pattern provided in a servo area on a recording medium, and the recording medium and a probe head section are reciprocatingly moved (scan-moved) by vibration at a specific frequency in a one-axis direction. At this time, based on information from the servo area, relative position information between the recording medium and the probe head section is acquired, the relative position information is processed at a control section, and then, feedback control is carried out for carrying out position correction relative to an actuator.Type: GrantFiled: March 19, 2008Date of Patent: December 14, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Akihiro Koga, Shinji Takakura, Hiroaki Nakamura, Kohichi Kubo, Takahiro Hirai, Junichi Akiyama
-
Patent number: 7838877Abstract: There is proposed a nonvolatile information recording and reproducing device with low power consumption and high thermal stability. The information recording and reproducing apparatus according to an aspect of the present invention includes a recording layer and a unit for recording information by applying a voltage to the recording layer to generate a state change in the recording layer. The recording layer being configured to include at least a first compound having a hollandite structure.Type: GrantFiled: March 28, 2008Date of Patent: November 23, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Shinya Aoki, Kohichi Kubo, Takayuki Tsukamoto, Chikayoshi Kamata, Takahiro Hirai, Toshiro Hiraoka
-
Patent number: 7819203Abstract: An impact force is transmitted to a tip end tool due to the changes of the air pressure within an air chamber generated by the reciprocal operation of the piston within a striker. The attachment portion of a tip end tool holding member for holding the tip end tool to a cylinder casing is sandwiched between buffers disposed in the two directions of the axial direction of the tool thereby to elastically support the tip end tool holding member to be movable in the two directions of the axial direction of the tool.Type: GrantFiled: June 7, 2005Date of Patent: October 26, 2010Assignee: Hitachi Koki Co., Ltd.Inventors: Shinichiro Sato, Tsukasa Suzuura, Takahiro Hirai
-
Publication number: 20100202187Abstract: A data read/write device according to an example of the present invention includes a recording layer, and means for applying a voltage to the recording layer, generating a resistance change in the recording layer, and recording data. The recording layer is composed of a composite compound having at least two types of cation elements, at least one type of the cation element is a transition element having a “d” orbit in which electrons have been incompletely filled, and the shortest distance between the adjacent cation elements is 0.32 nm or less.Type: ApplicationFiled: April 19, 2010Publication date: August 12, 2010Inventors: Koichi Kubo, Takahiro Hirai, Shinya Aoki, Robin Carter, Chikayoshi Kamata
-
Patent number: D623197Type: GrantFiled: October 15, 2009Date of Patent: September 7, 2010Assignee: Hitachi Koki Co., Ltd.Inventors: Satoshi Hotta, Tomoyuki Kawahara, Takahiro Hirai, Fumikazu Hirasawa, Takamoto Horiuchi, Masanori Okada, Shingo Kosugi