Patents by Inventor Naoto Kusumoto

Naoto Kusumoto 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).

  • Patent number: 7456104
    Abstract: To provide a thin film integrated circuit at low cost and with thin thickness, which is applicable to mass production unlike the conventional glass substrate or the single crystalline silicon substrate, and a structure and a process of a thin film integrated circuit device or an IC chip having the thin film integrated circuit. A manufacturing method of a semiconductor device includes the steps of forming a first insulating film over one surface of a silicon substrate, forming a layer having at least two thin film integrated circuits over the first insulating film, forming a resin layer so as to cover the layer having the thin film integrated circuit, forming a film so as to cover the resin layer, grinding a backside of one surface of the silicon substrate which is formed with the layer having the thin film integrated circuit, and polishing the ground surface of the silicon substrate.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: November 25, 2008
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Naoto Kusumoto, Takuya Tsurume
  • Patent number: 7452788
    Abstract: A linear pulse laser beam to be applied to an illumination surface is so formed as to have, at the focus, an energy profile in the width direction which satisfies inequalities 0.5L1?L2?L1 and 0.5L1?L3?L1 where assuming that a maximum energy is 1, L1 is a beam width of two points having an energy of 0.95 and L1+L2+L3 is a beam width of two points having an energy of 0.70, L2 and L3 occupying two peripheral portions of the beam width. According to another aspect of the invention, a compound-eye-like fly-eye lens for expanding a pulse laser beam in a sectional manner is provided upstream of a cylindrical lens for converging the laser beam into a linear beam.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: November 18, 2008
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Naoto Kusumoto, Koichiro Tanaka
  • Publication number: 20080265376
    Abstract: It is an object of the present invention to decrease a unit cost of an IC chip and to achieve the mass-production of IC chips. According to the present invention, a substrate having no limitation in size, such as a glass substrate, is used instead of a silicon substrate. This achieves the mass-production and the decrease of the unit cost of the IC chip. Further, a thin IC chip is provided by grinding and polishing the substrate such as the glass substrate.
    Type: Application
    Filed: July 6, 2005
    Publication date: October 30, 2008
    Inventors: Takuya Tsurume, Koji Dairiki, Naoto Kusumoto
  • Patent number: 7435635
    Abstract: A semiconductor material and a method for forming the same, said semiconductor material having produced by a process comprising melting a noncrystal semiconductor film containing therein carbon, nitrogen, and oxygen each at a concentration of 5×1019 atoms·cm?3 or lower, preferably 1×1019 atoms·cm?3 or lower, by irradiating a laser beam or a high intensity light equivalent to a laser beam to said noncrystal semiconductor film, and then recrystallizing the thus molten amorphous silicon film. The present invention provides thin film semiconductors having high mobility at an excellent reproducibility, said semiconductor materials being useful for fabricating thin film semiconductor devices such as thin film transistors improved in device characteristics.
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: October 14, 2008
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Hongyong Zhang, Naoto Kusumoto, Yasuhiko Takemura
  • Publication number: 20080246025
    Abstract: It is an object to provide an element structure in which defects are not easily generated and a semiconductor device that has the element. An element has a structure in which a layer containing an organic compound is interposed between a pair of electrode layers of a first electrode layer and a second electrode layer. At least one of the pair of the electrode layers has a Young's modulus of 7.5×1010 N/m2 or less. A layer containing an organic compound is formed using an organic compound appropriate to usage of an element to be formed, and a memory element, a light-emitting element, a piezoelectric element, or an organic transistor element is formed.
    Type: Application
    Filed: October 18, 2007
    Publication date: October 9, 2008
    Inventors: Ryoji Nomura, Takaaki Nagata, Naoto Kusumoto
  • Publication number: 20080213986
    Abstract: In order to promote an effect of laser annealing in respect of a semiconductor film, moisture is intentionally included in an atmosphere in irradiating laser beam to the semiconductor film by which a temperature holding layer comprising water vapor is formed on the surface of the semiconductor film in irradiating the laser beam and the laser annealing operation can be performed effectively.
    Type: Application
    Filed: March 26, 2008
    Publication date: September 4, 2008
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Naoto Kusumoto, Shunpei Yamazaki, Koichiro Tanaka
  • Publication number: 20080213954
    Abstract: A TFT having a high threshold voltage is connected to the source electrode of each TFT that constitutes a CMOS circuit. In another aspect, pixel thin-film transistors are constructed such that a thin-film transistor more distant from a gate line drive circuit has a lower threshold voltage. In a further aspect, a control film that is removable in a later step is formed on the surface of the channel forming region of a TFT, and doping is performed from above the control film.
    Type: Application
    Filed: March 3, 2008
    Publication date: September 4, 2008
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Shunpei Yamazaki, Naoto Kusumoto, Hideto Ohnuma, Koichiro Tanaka
  • Publication number: 20080203515
    Abstract: A photoelectric conversion device includes: a first substrate of which end portions are cut off so as to slope or with a groove shape; a photodiode and an amplifier circuit over the first substrate; a first electrode electrically connected to the photodiode and provided over one end portion of the first substrate; a second electrode electrically connected to the amplifier circuit and provided over an another end portion of the first substrate; and a second substrate having third and fourth electrodes thereon. The first and second electrodes are attached to the third and fourth electrodes, respectively, with a conductive material provided not only at the surfaces of the first, second, third, and fourth electrodes facing each other but also at the side surfaces of the first and second electrodes to increase the adhesiveness between a photoelectric conversion device and a member on which the photoelectric conversion device is mounted.
    Type: Application
    Filed: February 12, 2008
    Publication date: August 28, 2008
    Inventors: Naoto Kusumoto, Kazuo Nishi, Yuusuke Sugawara
  • Patent number: 7394130
    Abstract: In a process for manufacturing a thin film transistor having a semiconductor layer constituting source and drain regions and a channel forming region, by the semiconductor layer being made thinner in the source and drain regions than in the channel forming region a structure is realized wherein, at the boundary between the source region and the channel forming region and the boundary between the drain region and the channel forming region, portions where electric field concentrations occur are displaced from the portion where a channel is formed. By reducing the OFF current (the leak current) without also reducing the ON current, a high mutual conductance is realized.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: July 1, 2008
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Naoto Kusumoto
  • Patent number: 7371620
    Abstract: There is provided an improvement on homogeneity of annealing performed utilizing radiation of a laser beam on a silicon film having a large area. In a configuration wherein a linear laser beam is applied to a surface to be irradiated, optimization is carried out on the width and number of cylindrical lenses forming homogenizers 103 and 104 for controlling the distribution of radiation energy density in the longitudinal direction of the linear beam. For example, the width of the cylindrical lenses forming the homogenizers 103 and 104 is set in the range from 0.1 mm to 5 mm, and the number of the lenses is chosen such that one lens is provided for every 5 mm-15 mm along the length of the linear laser beam in the longitudinal direction thereof. This makes it possible to improve homogeneity of the radiation energy density of the linear laser in the longitudinal direction thereof.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: May 13, 2008
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Satoshi Teramoto, Naoto Kusumoto, Koichiro Tanaka
  • Publication number: 20080108205
    Abstract: The present invention provides a semiconductor device formed over an insulating substrate, typically a semiconductor device having a structure in which mounting strength to a wiring board can be increased in an optical sensor, a solar battery, or a circuit using a TFT, and which can make it mount on a wiring board with high density, and further a method for manufacturing the same. According to the present invention, in a semiconductor device, a semiconductor element is formed on an insulating substrate, a concave portion is formed on a side face of the semiconductor device, and a conductive film electrically connected to the semiconductor element is formed in the concave portion.
    Type: Application
    Filed: December 14, 2007
    Publication date: May 8, 2008
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kazuo Nishi, Hiroki Adachi, Junya Maruyama, Naoto Kusumoto, Yuusuke Sugawara, Tomoyuki Aoki, Eiji Sugiyama, Hironobu Takahashi
  • Patent number: 7368367
    Abstract: A preparing method of a semiconductor, particularly a preparing method of a polycrystal semiconductor film which has a good electrical property is disclosed. In order to obtain a non-crystalline silicon film containing a lot of combination of hydrogen and silicon, a forming process of a non-crystalline silicon film by a low temperature gas phase chemical reaction, a process of a heat annealing to produce a lot of dangling bonds of silicon, so as to draw out hydrogen from said non-crystalline silicon film, and a process of applying a laser irradiation to said non-crystal silicon film having a lot of dangling bond of silicon are conducted.
    Type: Grant
    Filed: August 1, 2005
    Date of Patent: May 6, 2008
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Hongyong Zhang, Naoto Kusumoto
  • Patent number: 7351646
    Abstract: In order to promote an effect of laser annealing in respect of a semiconductor film, moisture is intentionally included in an atmosphere in irradiating laser beam to the semiconductor film by which a temperature holding layer comprising water vapor is formed on the surface of the semiconductor film in irradiating the laser beam and the laser annealing operation can be performed effectively.
    Type: Grant
    Filed: February 4, 2003
    Date of Patent: April 1, 2008
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Naoto Kusumoto, Shunpei Yamazaki, Koichiro Tanaka
  • Patent number: 7348227
    Abstract: A TFT having a high threshold voltage is connected to the source electrode of each TFT that constitutes a CMOS circuit. In another aspect, pixel thin-film transistors are constructed such that a thin-film transistor more distant from a gate line drive circuit has a lower threshold voltage. In a further aspect, a control film that is removable in a later step is formed on the surface of the channel forming region of a TFT, and doping is performed from above the control film.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: March 25, 2008
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Naoto Kusumoto, Hideto Ohnuma, Koichiro Tanaka
  • Patent number: 7335951
    Abstract: The present invention provides a semiconductor device formed over an insulating substrate, typically a semiconductor device having a structure in which mounting strength to a wiring board can be increased in an optical sensor, a solar battery, or a circuit using a TFT, and which can make it mount on a wiring board with high density, and further a method for manufacturing the same. According to the present invention, in a semiconductor device, a semiconductor element is formed on an insulating substrate, a concave portion is formed on a side face of the semiconductor device, and a conductive film electrically connected to the semiconductor element is formed in the concave portion.
    Type: Grant
    Filed: October 5, 2004
    Date of Patent: February 26, 2008
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kazuo Nishi, Hiroki Adachi, Junya Maruyama, Naoto Kusumoto, Yuusuke Sugawara, Tomoyuki Aoki, Eiji Sugiyama, Hironobu Takahashi
  • Publication number: 20080044962
    Abstract: A semiconductor device having a pair of impurity doped second semiconductor layers, formed on a first semiconductor layer having a channel formation region therein, an outer edge of the first semiconductor film being at least partly coextensive with an outer edge of the impurity doped second semiconductor layers. The semiconductor device further includes source and drain electrodes formed on the pair of impurity doped second semiconductor layers, wherein the pair of impurity doped second semiconductor layers extend beyond inner sides edges of the source and drain electrodes so that a stepped portion is formed from an upper surface of the source and drain electrodes to a surface of the first semiconductor film.
    Type: Application
    Filed: September 17, 2007
    Publication date: February 21, 2008
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Hongyong Zhang, Naoto Kusumoto
  • Publication number: 20080042168
    Abstract: Thin film integrated circuits are peeled from a substrate and the peeled thin film integrated circuits are sealed, efficiently in order to improve manufacturing yields. The present invention provides laminating system comprising transporting means for transporting a substrate provided with a plurality of thin film integrated circuits; first peeling means for bonding first surfaces of the thin film integrated circuits to a first sheet member to peel the thin film integrated circuits from the substrate; second peeling means for bonding second surfaces of the thin film integrated circuits to a second sheet member to peel the thin film integrated circuits from the first sheet member; and sealing means for interposing the thin film integrated circuits between the second sheet member and a third sheet member to seal the thin film integrated circuit with the second sheet member and the third sheet member.
    Type: Application
    Filed: July 28, 2005
    Publication date: February 21, 2008
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Ryosuke Watanabe, Naoto Kusumoto, Osamu Nakamura
  • Publication number: 20080012126
    Abstract: Paper embedded with a semiconductor device capable of communicating wirelessly is realized, whose unevenness of a portion including the semiconductor device does not stand out and the paper is thin with a thickness of less than or equal to 130 ?m. A semiconductor device is provided with a circuit portion and an antenna, and the circuit portion includes a thin film transistor. The circuit portion and the antenna are separated from a substrate used during manufacturing, and are interposed between a flexible base and a sealing layer and protected. The semiconductor device can be bent, and the thickness of the semiconductor device itself is less than or equal to 30 ?m. The semiconductor device is embedded in a paper in a papermaking process.
    Type: Application
    Filed: June 25, 2007
    Publication date: January 17, 2008
    Inventors: Yoshitaka Dozen, Tomoyuki Aoki, Hidekazu Takahashi, Daiki Yamada, Kaori Ogita, Naoto Kusumoto
  • Publication number: 20080001280
    Abstract: An antenna used for an ID chip or the like is disclosed with planarized antenna unevenness and an IC chip having such the antenna with a flat surface is disclosed. Manufacturing an integrated circuit mounted with an antenna is facilitated. A laminated body formed by stacking a conductive film 11, a resin film 13, an integrated circuit 12, and a resin film 14 are rolled so that the resin film 14 is outside. Then, the laminated body is integrated in a roll form by softening the resin films 13, 14 by applying heat. By slicing the rolled laminated body along with the direction in which the rolled conductive film 31 appears in the cross section, an IC chip with antenna formed by the rolled conductive film 11 is formed.
    Type: Application
    Filed: November 4, 2005
    Publication date: January 3, 2008
    Inventors: Naoto Kusumoto, Takuya Tsurume
  • Publication number: 20080001148
    Abstract: An object of the present invention to provide a semiconductor device manufactured in short time by performing the step of forming the thin film transistor and the step of forming the photoelectric conversion layer in parallel, and to provide a manufacturing process thereof. According to the present invention, a semiconductor device is manufactured in such a way that a thin film transistor is formed over a first substrate, a photoelectric conversion element is formed over a second substrate, and the thin film transistor and the photoelectric conversion element are connected electrically by sandwiching a conductive layer between the first and second substrates opposed to each other so that the thin film transistor and the photoelectric conversion element are located between the first and second substrates. Thus, a method for manufacturing a semiconductor device which suppresses the increase in the number of steps and which increases the throughput can be provided.
    Type: Application
    Filed: May 16, 2005
    Publication date: January 3, 2008
    Inventors: Kazuo Nishi, Junya Maruyama, Naoto Kusumoto, Yuusuke Sugawara