Patents by Inventor Makoto Kawai

Makoto Kawai 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: 8314006
    Abstract: Provided is a method for manufacturing a bonded wafer with a good thin film over the entire substrate surface, especially in the vicinity of the lamination terminal point. The method for manufacturing a bonded wafer comprises at least the following steps of: forming an ion-implanted region by implanting a hydrogen ion or a rare gas ion, or the both types of ions from a surface of a first substrate which is a semiconductor substrate; subjecting at least one of an ion-implanted surface of the first substrate and a surface of a second substrate to be attached to a surface activation treatment; laminating the ion-implanted surface of the first substrate and the surface of the second substrate in an atmosphere with a humidity of 30% or less and/or a moisture content of 6 g/m3 or less; and a splitting the first substrate at the ion-implanted region so as to reduce thickness of the first substrate, thereby manufacturing a bonded wafer with a thin film on the second substrate.
    Type: Grant
    Filed: April 10, 2009
    Date of Patent: November 20, 2012
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yuji Tobisaka, Yoshihiro Kubota, Atsuo Ito, Kouichi Tanaka, Makoto Kawai, Shoji Akiyama, Hiroshi Tamura
  • Patent number: 8268700
    Abstract: There is disclosed a method for manufacturing an SOI wafer comprising at least: implanting a hydrogen ion, a rare gas ion, or both the ions into a donor wafer formed of a silicon wafer or a silicon wafer having an oxide film formed on a surface thereof from a surface of the donor wafer, thereby forming an ion implanted layer; performing a plasma activation treatment with respect to at least one of an ion implanted surface of the donor wafer and a surface of a handle wafer, the surface of the handle wafer is to be bonded to the ion implanted surface; closely bonding these surfaces to each other; mechanically delaminating the donor wafer at the ion implanted layer as a boundary and thereby reducing a film thickness thereof to provide an SOI layer, and performing a heat treatment at 600 to 1000° C.; and polishing a surface of the SOI layer for 10 to 50 nm based on chemical mechanical polishing.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: September 18, 2012
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Shoji Akiyama, Yoshihiro Kubota, Atsuo Ito, Koichi Tanaka, Makoto Kawai, Yuuji Tobisaka
  • Publication number: 20120228730
    Abstract: A plasma treatment or an ozone treatment is applied to the respective bonding surfaces of the single-crystal Si substrate in which the ion-implanted layer has been formed and the quartz substrate, and the substrates are bonded together. Then, a force of impact is applied to the bonded substrate to peel off a silicon thin film from the bulk portion of single-crystal silicon along the hydrogen ion-implanted layer, thereby obtaining an SOI substrate having an SOI layer on the quartz substrate. A concave portion, such as a hole or a micro-flow passage, is formed on a surface of the quartz substrate of the SOI substrate thus obtained, so that processes required for a DNA chip or a microfluidic chip are applied. A silicon semiconductor element for the analysis/evaluation of a sample attached/held to this concave portion is formed in the SOI layer.
    Type: Application
    Filed: May 21, 2012
    Publication date: September 13, 2012
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Shoji AKIYAMA, Yoshihiro Kubota, Atsuo Ito, Koichi Tanaka, Makoto Kawai, Yuuji Tobisaka
  • Patent number: 8263478
    Abstract: Hydrogen ions are implanted to a surface (main surface) of the single crystal Si substrate 10 at a dosage of 1.5×1017 atoms/cm2 or higher to form the hydrogen ion implanted layer (ion-implanted damage layer) 11. As a result of the hydrogen ion implantation, the hydrogen ion implanted boundary 12 is formed. The single crystal Si substrate 10 and the low melting glass substrate 20 are bonded together. The bonded substrate is heated at relatively low temperature, 120° C. or higher and 250° C. or lower (below a melting point of the support substrate). Further, an external shock is applied to delaminate the Si crystal film along the hydrogen ion implanted boundary 12 of the single crystal Si substrate 10 out of the heat-treated bonded substrate. Then, the surface of the resultant silicon thin film 13 is polished to remove a damaged portion, so that a semiconductor substrate can be fabricated.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: September 11, 2012
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Shoji Akiyama, Yoshihiro Kubota, Atsuo Ito, Koichi Tanaka, Makoto Kawai, Yuuji Tobisaka
  • Patent number: 8227290
    Abstract: A method for producing a single crystal silicon solar cell including the steps of: implanting ions into a single crystal silicon substrate through an ion implanting surface thereof; closely contacting the single crystal silicon substrate and a transparent insulator substrate with each other via a transparent adhesive while using the ion implanting surface as a bonding surface; curing the transparent adhesive; applying an impact to the ion implanted layer to mechanically delaminate the single crystal silicon substrate; forming a plurality of diffusion regions having a second conductivity type at the delaminated surface side of the single crystal silicon layer, such that a plurality of first conductivity-type regions and second conductivity-type regions are present at the delaminated surface of the single crystal silicon layer; forming pluralities of individual electrodes on the pluralities of first and second conductivity-type regions, respectively; and forming collector electrodes for the individual electrode
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: July 24, 2012
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Atsuo Ito, Shoji Akiyama, Masahiro Furuya, Makoto Kawai, Koichi Tanaka, Yoshihiro Kubota, Yuuji Tobisaka
  • Patent number: 8227289
    Abstract: A method for producing a single crystal silicon solar cell including the steps of: implanting ions into a single crystal silicon substrate; conducting a surface activating treatment for at least one of: the ion implanting surface of the single crystal silicon substrate, and a surface of the transparent insulator substrate; bonding the ion implanting surface of the single crystal silicon substrate and the transparent insulator substrate to each other, such that the surface(s) subjected to the surface activating treatment is/are used as a bonding surface(s); applying an impact to the ion implanted layer; and forming a plurality of diffusion regions having a second conductivity type at the delaminated surface side of the single crystal silicon layer, such that a plurality of first conductivity-type regions and second conductivity-type regions are present at the delaminated surface of the single crystal silicon layer.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: July 24, 2012
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Atsuo Ito, Shoji Akiyama, Makoto Kawai, Koichi Tanaka, Yuuji Tobisaka, Yoshihiro Kubota
  • Publication number: 20120184734
    Abstract: This invention provides compounds having antiviral activities especially inhibiting activity for influenza virus, more preferably provides substituted 3-hydroxy-4-pyridone derivatives having cap-dependent endonuclease inhibitory activity.
    Type: Application
    Filed: June 14, 2010
    Publication date: July 19, 2012
    Inventors: Toshiyuki Akiyama, Kenji Takaya, Makoto Kawai, Yoshiyuki Taoda, Minako Mikamiyama, Kenji Morimoto, Chika Kageyama, Kenji Tomita, Hidenori Mikamiyama, Naoyuki Suzuki
  • Publication number: 20120126362
    Abstract: A bonded SOS substrate having a semiconductor film on or above a surface of a sapphire substrate is obtained by a method with the steps of implanting ions from a surface of a semiconductor substrate to form an ion-implanted layer; activating at least a surface from which the ions have been implanted; bonding the surface of the semiconductor substrate and the surface of the sapphire substrate at a temperature of 50° C. to 350° C.; heating the bonded substrates at a maximum temperature from 200° C. to 350° C. to form a bonded body; and irradiating visible light from a sapphire substrate side or a semiconductor substrate side to the ion-implanted layer of the semiconductor substrate for embrittling an interface of the ion-implanted layer, while keeping the bonded body at a temperature higher than the temperature at which the surfaces of the semiconductor substrate and the sapphire substrate were bonded.
    Type: Application
    Filed: May 25, 2010
    Publication date: May 24, 2012
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Shoji Akiyama, Atsuo Ito, Yuji Tobisaka, Makoto Kawai
  • Publication number: 20120119323
    Abstract: A method of making bonded SOS substrate with a semiconductor film on or above a sapphire substrate by implanting ions from a surface of the semiconductor substrate to form an ion-implanted layer; activating at least a surface of one of the sapphire substrate and the semiconductor substrate from which the ions have been implanted; bonding the surface of the semiconductor substrate and the surface of the sapphire substrate at a temperature of from 50° C. to 350° C.; heating the bonded substrates at a maximum temperature of from 200° C. to 350° C.; and irradiating visible light from a sapphire substrate side or a semiconductor substrate side to the ion-implanted layer of the semiconductor substrate to make the interface of the ion-implanted layer brittle at a temperature of the bonded body higher than the temperature at which the surfaces were bonded, to transfer the semiconductor film to the sapphire substrate.
    Type: Application
    Filed: May 25, 2010
    Publication date: May 17, 2012
    Applicant: Shin-etsu Chemical Co., Ltd.
    Inventors: Shoji Akiyama, Atsuo Ito, Yuji Tobisaka, Makoto Kawai
  • Publication number: 20120118354
    Abstract: A single crystal silicon solar cell including a stack having at least a light-reflecting film, a single crystal silicon layer, a transparent adhesive layer, and a transparent insulator substrate; a plurality of areas of a first conductivity type and a plurality of areas of a second conductivity type formed in a surface of the silicon layer near the light-reflecting film; a plurality of pn junctions formed in a plane direction of the silicon layer; a plurality of first individual electrodes, each being formed on each one of the plurality of areas of the first conductivity type, and a plurality of second individual electrodes, each being formed on each one of the plurality of areas of the second conductivity type; and a first collector electrode for connecting the plurality of first individual electrodes and a second collector electrode for connecting the plurality of second individual electrodes.
    Type: Application
    Filed: December 23, 2011
    Publication date: May 17, 2012
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Atsuo ITO, Shoji AKIYAMA, Makoto KAWAI, Kouichi TANAKA, Yuuji TOBISAKA, Yoshihiro KUBOTA
  • Patent number: 8138177
    Abstract: This invention relates to compounds of the formula (I): or pharmaceutically acceptable salts thereof, wherein: A, B, R1, R2 and R3 are each as described herein, and compositions containing such compounds and the use of such compounds in the treatment of a condition mediated by CB2 receptor binding activity such as, but not limited to, inflammatory pain, nociceptive pain, neuropathic pain, fibromyalgia, chronic low back pain, visceral pain, acute cerebral ischemia, pain, chronic pain, acute pain, post herpetic neuralgia, neuropathies, neuralgia, diabetic neuropathy, HIV-related neuropathy, nerve injury, rheumatoid arthritic pain, osteoarthritic pain, back pain, cancer pain, dental pain, fibromyalgia, neuritis, sciatica, inflammation, neurodegenerative disease, cough, broncho constriction, irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), colitis, cerebrovascular ischemia, emesis such as cancer chemotherapy-induced emesis, rheumatoid arthritis, asthma, Crohn's disease, ulcerative colitis, asthma
    Type: Grant
    Filed: March 2, 2006
    Date of Patent: March 20, 2012
    Assignee: Pfizer Inc.
    Inventors: Kazuo Ando, Makoto Kawai, Tsutomu Masuda, Hirofumi Omura
  • Patent number: 8138064
    Abstract: A method for producing a silicon film-transferred insulator wafer is disclosed. The method includes a surface activation step of performing a surface activation treatment on at least one of a surface of an insulator wafer and a hydrogen ion-implanted surface of a single crystal silicon wafer into which a hydrogen ion has been implanted to form a hydrogen ion-implanted layer; a bonding step that bonds the hydrogen ion-implanted surface to the surface of the insulator wafer to obtain bonded wafers; a first heating step that heats the bonded wafers; a grinding and/or etching step of grinding and/or etching a surface of a single crystal silicon wafer side of the bonded wafers; a second heating step that heats the bonded wafers; and a detachment step to detach the hydrogen ion-implanted layer by applying a mechanical impact to the hydrogen ion-implanted layer of the bonded wafers thus heated at the second temperature.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: March 20, 2012
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Shoji Akiyama, Yoshihiro Kubota, Atsuo Ito, Makoto Kawai, Kouichi Tanaka, Yuji Tobisaka, Yoshihiro Nojima
  • Publication number: 20120058622
    Abstract: When a thermal expansion coefficient of a handle substrate is higher than that of a donor substrate, delamination is provided without causing a crack in the substrates. A method for producing a bonded wafer, with at least the steps of: implanting ions into a donor substrate (3) from a surface thereof to form an ion-implanted interface (5); bonding a handle substrate (7) with a thermal expansion coefficient higher than that of the donor substrate (3) onto the ion-implanted surface of the donor substrate to provide bonded substrates, subjecting the bonded substrates to a heat treatment to provide an assembly (1), and delaminating the donor substrate (3) of the assembly (1) at the ion-implanted interface wherein the assembly (1) has been cooled to a temperature not greater than room temperature by a cooling apparatus (20), so that a donor film is transferred onto the handle substrate (7).
    Type: Application
    Filed: April 30, 2010
    Publication date: March 8, 2012
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Makoto Kawai, Yuji Tobisaka, Shoji Akiyama
  • Patent number: 8129612
    Abstract: There is disclosed a method for manufacturing a single-crystal silicon solar cell including the steps of: implanting a hydrogen ion or a rare gas ion into a single-crystal silicon substrate; forming a transparent insulator layer on a metal substrate; performing a surface activation treatment with respect to at least one of the ion implanted surface and a surface of the transparent insulator layer; bonding these surfaces; mechanically delaminating the single-crystal silicon substrate to provide a single-crystal silicon layer; forming a plurality of second conductivity type diffusion regions in the delaminated surface side of the single-crystal silicon layer so that a plurality of first conductivity type regions and the plurality of second conductivity regions are present in the delaminated surface of the single-crystal silicon layer; respectively forming a plurality of individual electrodes on the plurality of first and second conductivity type regions of the single-crystal silicon layer; forming respective co
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: March 6, 2012
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Atsuo Ito, Shoji Akiyama, Makoto Kawai, Koichi Tanaka, Yuuji Tobisaka, Yoshihiro Kubota
  • Patent number: 8119903
    Abstract: There is disclosed a single crystal silicon solar cell includes the steps of: implanting hydrogen ions or rare gas ions to a single crystal silicon substrate; performing surface activation on at least one of an ion-implanted surface of the single crystal silicon substrate and a surface of a transparent insulator substrate; bonding the ion-implanted surface of the single crystal silicon substrate and the transparent insulator substrate with the surface-activated surface being set as a bonding surface; applying an impact onto the ion implanted layer to mechanically delaminate the single crystal silicon substrate to form a single crystal silicon layer; forming a plurality of diffusion regions having a second conductivity type on the delaminated plane side of the single crystal silicon layer; forming a plurality of first conductivity type regions and a plurality of second conductivity type regions on the delaminated plane of the single crystal silicon layer; and forming a light reflection film that covers the plu
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: February 21, 2012
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Atsuo Ito, Shoji Akiyama, Makoto Kawai, Koichi Tanaka, Yuuji Tobisaka, Yoshihiro Kubota
  • Patent number: 8106290
    Abstract: A method for manufacturing a single crystal silicon solar cell includes implanting either hydrogen ions or rare-gas ions into a single crystal silicon substrate; bringing the single crystal silicon substrate in close contact with a transparent insulator substrate via a transparent adhesive, with the ion-implanted surface being a bonding surface; curing the transparent adhesive; mechanically delaminating the single crystal silicon substrate to form a single crystal silicon layer; forming a plurality of diffusion areas of a second conductivity type in the delaminated surface side of the single crystal silicon layer, and causing a plurality of areas of a first conductivity type and the plurality of areas of the second conductivity type to be present in the delaminated surface of the single crystal silicon layer; forming each of a plurality of individual electrodes on each one of the plurality of areas of the first conductivity type and on each one of the plurality of areas of the second conductivity type; formin
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: January 31, 2012
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Atsuo Ito, Shoji Akiyama, Makoto Kawai, Kouichi Tanaka, Yuuji Tobisaka, Yoshihiro Kubota
  • Publication number: 20120022255
    Abstract: This invention provides compounds having antiviral activities especially inhibiting activity for influenza virus, more preferably provides substituted 3-hydroxy-4-pyridone derivatives having cap-dependent endonuclease inhibitory activity.
    Type: Application
    Filed: March 23, 2010
    Publication date: January 26, 2012
    Inventors: Toshio Fujishita, Minako Mikamiyama, Makoto Kawai, Toshiyuki Akiyama
  • Patent number: 8088670
    Abstract: When manufacturing a bonded substrate using an insulator substrate as a handle wafer, there is provided a method for manufacturing a bonded substrate which can be readily removed after carried and after mounted by roughening a back surface of the bonded substrate (corresponding to a back surface of the insulator substrate) and additionally whose front surface can be easily identified like a process of a silicon semiconductor wafer in case of the bonded substrate using a transparent insulator substrate as a handle wafer. There is provided a method for manufacturing a bonded substrate in which an insulator substrate is used as a handle wafer and a donor wafer is bonded to a front surface of the insulator substrate, the method comprises at least that a sandblast treatment is performed with respect to a back surface of the insulator substrate.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: January 3, 2012
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Shoji Akiyama, Yoshihiro Kubota, Atsuo Ito, Kouichi Tanaka, Makoto Kawai, Yuuji Tobisaka
  • Publication number: 20110290320
    Abstract: A method for producing a single crystal silicon solar cell including the steps of: implanting ions into a single crystal silicon substrate through an ion implanting surface thereof to form an ion implanted layer in the single crystal silicon substrate; forming a transparent electroconductive film on a surface of a transparent insulator substrate; conducting a surface activating treatment for the ion implanting surface of the single crystal silicon substrate and/or a surface of the transparent electroconductive film on the transparent insulator substrate; bonding the ion implanting surface of the single crystal silicon substrate and the surface of the transparent electroconductive film on the transparent insulator substrate to each other; applying an impact to the ion implanted layer; and forming a p-n junction in the single crystal silicon layer.
    Type: Application
    Filed: July 28, 2011
    Publication date: December 1, 2011
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Atsuo Ito, Shoji Akiyama, Makoto Kawai, Koichi Tanaka, Yuuji Tobisaka, Yoshihiro Kubota
  • Publication number: 20110290321
    Abstract: A method for producing a single crystal silicon solar cell including the steps of: implanting ions into a single crystal silicon substrate through an ion implanting surface thereof; closely contacting the single crystal silicon substrate and a transparent insulator substrate with each other via a transparent electroconductive adhesive while using the ion implanting surface as a bonding surface; curing and maturing the transparent electroconductive adhesive into a transparent electroconductive film; applying an impact to the ion implanted layer to mechanically delaminate the single crystal silicon substrate to leave a single crystal silicon layer; and forming a p-n junction in the single crystal silicon layer.
    Type: Application
    Filed: August 3, 2011
    Publication date: December 1, 2011
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Atsuo Ito, Shoji Akiyama, Makoto Kawai, Koichi Tanaka, Yuuji Tobisaka, Yoshihiro Kubota