Patents by Inventor Isamu Asano

Isamu Asano 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: 20060024875
    Abstract: In a process for manufacturing a semiconductor integrated circuit device having a MISFET, in order that a shallow junction between the source/drain of the MISFET and a semiconductor substrate may be realized by reducing the number of heat treatment steps, all conductive films to be deposited on the semiconductor substrate are deposited at a temperature of 500° C. or lower at a step after the MISFET has been formed. Moreover, all insulating films to be deposited over the semiconductor substrate are deposited at a temperature of 500° C. or lower at a step after the MISFET has been formed.
    Type: Application
    Filed: September 26, 2005
    Publication date: February 2, 2006
    Inventors: Makoto Yoshida, Takahiro Kumauchi, Yoshitaka Tadaki, Kazuhiko Kajigaya, Hideo Aoki, Isamu Asano
  • Patent number: 6987069
    Abstract: With a view to preventing the oxidation of a metal film at the time of light oxidation treatment after gate patterning and at the same time to making it possible to control the reproducibility of oxide film formation and homogeneity of oxide film thickness at gate side-wall end portions, in a gate processing step using a poly-metal, a gate electrode is formed by patterning a gate electrode material which has been deposited over a semiconductor wafer 1A having a gate oxide film formed thereon and has a poly-metal structure and then, the principal surface of the semiconductor wafer 1A heated to a predetermined temperature or vicinity thereof is supplied with a hydrogen gas which contains water at a low concentration, the water having been formed from hydrogen and oxygen by a catalytic action, to selectively oxidize the principal surface of the semiconductor wafer 1A, whereby the profile of the side-wall end portions of the gate electrode is improved.
    Type: Grant
    Filed: April 12, 2004
    Date of Patent: January 17, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Yoshikazu Tanabe, Isamu Asano, Makoto Yoshida, Naoki Yamamoto, Masayoshi Saito, Nobuyoshi Natsuaki
  • Publication number: 20050266630
    Abstract: With a view to preventing the oxidation of a metal film at the time of light oxidation treatment after gate patterning and at the same time to making it possible to control the reproducibility of oxide film formation and homogeneity of oxide film thickness at gate side-wall end portions, in a gate processing step using a poly-metal, a gate electrode is formed by patterning a gate electrode material which has been deposited over a semiconductor wafer 1A having a gate oxide film formed thereon and has a poly-metal structure and then, the principal surface of the semiconductor wafer 1A heated to a predetermined temperature or vicinity thereof is supplied with a hydrogen gas which contains water at a low concentration, the water having been formed from hydrogen and oxygen by a catalytic action, to selectively oxidize the principal surface of the semiconductor wafer 1A, whereby the profile of the side-wall end portions of the gate electrode is improved
    Type: Application
    Filed: August 4, 2005
    Publication date: December 1, 2005
    Inventors: Yoshikazu Tanabe, Isamu Asano, Makoto Yoshida, Naoki Yamamoto, Masayoshi Saito, Nobuyoshi Natsuaki
  • Patent number: 6965140
    Abstract: It is an object of the present invention to provide a high-reliability semiconductor device having a storage capacitor and wiring using copper for a main conductive film. Under the above object, the present invention provides a semiconductor device comprising: a semiconductor substrate; a storage capacitor formed on the main surface side of the semiconductor substrate and being a first electrode and a second electrode arranged so as to put a capacitor insulation film; a wiring conductor formed on the main surface side of the semiconductor substrate and including the copper (Cu) element; and a first film formed on the surface of the wiring conductor; wherein a material configuring the first film and a material configuring the first electrode and/or the second electrode include the same element.
    Type: Grant
    Filed: September 25, 2003
    Date of Patent: November 15, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Yukihiro Kumagai, Hideo Miura, Hiroyuki Ohta, Tomio Iwasaki, Isamu Asano
  • Patent number: 6927439
    Abstract: A semiconductor device equipped with information storage capacitor comprising a first capacitor electrode, an oxide film, a second capacitor electrode and insulating films containing silicon as a main constituting element, wherein at least one of first and second capacitor electrodes contains as a main constituting element at least one element selected from rhodium, ruthenium, iridium, osmium and platinum, and as an adding element at least one element selected from palladium, nickel, cobalt and titanium, is excellent in adhesiveness between the capacitor electrodes and the insulating films.
    Type: Grant
    Filed: August 23, 2004
    Date of Patent: August 9, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Moriya, Tomio Iwasaki, Hiroyuki Ohta, Shinpei Iijima, Isamu Asano, Yuzuru Ohji, Yoshitaka Nakamura
  • Publication number: 20050118762
    Abstract: After an upper electrode protective film is formed such that it is in a firm contact with ruthenium film of the upper electrode without damaging the ruthenium film, the upper electrode is etched, thereby, a MIM capacitor is obtained in which leak current is not increased due to oxidation of the ruthenium film of the upper electrode.
    Type: Application
    Filed: November 30, 2004
    Publication date: June 2, 2005
    Applicant: ELPIDA MEMORY, INC.
    Inventors: Yoshitaka Nakamura, Tsuyoshi Kawagoe, Hiroshi Sakuma, Isamu Asano, Keiji Kuroki, Hidekazu Goto, Shinpei Iijima
  • Patent number: 6894334
    Abstract: Herein disclosed is a semiconductor integrated circuit device fabricating process for forming MISFETs over the principal surface in those active regions of a substrate, which are surrounded by inactive regions formed of an element separating insulating film and channel stopper regions, comprising: the step of for forming a first mask by a non-oxidizable mask and an etching mask sequentially over the principal surface of the active regions of the substrate; the step of forming a second mask on and in self-alignment with the side walls of the first mask by a non-oxidizable mask thinner than the non-oxidizable mask of the first mask and an etching mask respectively; the step of etching the principal surface of the inactive regions of the substrate by using the first mask and the second mask; the step of forming the element separating insulating film over the principal surface of the inactive regions of the substrate by an oxidization using the first mask and the second mask; and the step of forming the channel s
    Type: Grant
    Filed: March 3, 2003
    Date of Patent: May 17, 2005
    Assignees: Hitachi, Ltd., Hitachi VLSI Engineering Corp.
    Inventors: Jun Sugiura, Osamu Tsuchiya, Makoto Ogasawara, Fumio Ootsuka, Kazuyoshi Torii, Isamu Asano, Nobuo Owada, Mitsuaki Horiuchi, Tsuyoshi Tamaru, Hideo Aoki, Nobuhiro Otsuka, Seiichirou Shirai, Masakazu Sagawa, Yoshihiro Ikeda, Masatoshi Tsuneoka, Toru Kaga, Tomotsugu Shimmyo, Hidetsugu Ogishi, Osamu Kasahara, Hiromichi Enami, Atsushi Wakahara, Hiroyuki Akimori, Sinichi Suzuki, Keisuke Funatsu, Yoshinao Kawasaki, Tunehiko Tubone, Takayoshi Kogano, Ken Tsugane
  • Publication number: 20050042822
    Abstract: In a process for manufacturing a semiconductor integrated circuit device having a MISFET, in order that a shallow junction between the source/drain of the MISFET and a semiconductor substrate may be realized by reducing the number of heat treatment steps, all conductive films to be deposited on the semiconductor substrate are deposited at a temperature of 500° C. or lower at a step after the MISFET has been formed. Moreover, all insulating films to be deposited over the semiconductor substrate are deposited at a temperature of 500° C. or lower at a step after the MISFET has been formed.
    Type: Application
    Filed: September 28, 2004
    Publication date: February 24, 2005
    Inventors: Makoto Yoshida, Takahiro Kumauchi, Yoshitaka Tadaki, Kazuhiko Kajigaya, Hideo Aoki, Isamu Asano
  • Publication number: 20050040452
    Abstract: The semiconductor device is formed according to the following steps. A TiN film 71 and a W film 72 are deposited on a silicon oxide film 64 including the inside of a via-hole 66 by the CVD method and thereafter, the W film 72 and TiN film 71 on the silicon oxide film 64 are etched back to leave only the inside of the via-hole 66 and form a plug 73. Then, a TiN film 74, Al-alloy film 75, and Ti film 76 are deposited on the silicon oxide film 64 including the surface of the plug 73 by the sputtering method and thereafter, the Ti film 76, Al-alloy film 75, and TiN film 74 are patterned to form second-layer wirings 77 and 78.
    Type: Application
    Filed: October 7, 2004
    Publication date: February 24, 2005
    Inventors: Yoshitaka Nakamura, Tsuyoshi Tamaru, Naoki Fukuda, Hidekazu Goto, Isamu Asano, Hideo Aoki, Keizo Kawakita, Satoru Yamada, Katsuhiko Tanaka, Hiroshi Sakuma, Masayoshi Hirasawa
  • Patent number: 6853081
    Abstract: The semiconductor device is formed according to the following steps. A TiN film 71 and a W film 72 are deposited on a silicon oxide film 64 including the inside of a via-hole 66 by the CVD method and thereafter, the W film 72 and TiN film 71 on the silicon oxide film 64 are etched back to leave only the inside of the via-hole 66 and form a plug 73. Then, a TiN film 74, Al-alloy film 75, and Ti film 76 are deposited on the silicon oxide film 64 including the surface of the plug 73 by the sputtering method and thereafter, the Ti film 76, Al-alloy film 75, and TiN film 74 are patterned to form second-layer wirings 77 and 78.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: February 8, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Yoshitaka Nakamura, Tsuyoshi Tamaru, Naoki Fukuda, Hidekazu Goto, Isamu Asano, Hideo Aoki, Keizo Kawakita, Satoru Yamada, Katsuhiko Tanaka, Hiroshi Sakuma, Masayoshi Hirasawa
  • Publication number: 20050024811
    Abstract: A semiconductor device equipped with information storage capacitor comprising a first capacitor electrode, an oxide film, a second capacitor electrode and insulating films containing silicon as a main constituting element, wherein at least one of first and second capacitor electrodes contains as a main constituting element at least one element selected from rhodium, ruthenium, iridium, osmium and platinum, and as an adding element at least one element selected from palladium, nickel, cobalt and titanium, is excellent in adhesiveness between the capacitor electrodes and the insulating films.
    Type: Application
    Filed: August 23, 2004
    Publication date: February 3, 2005
    Inventors: Hiroshi Moriya, Tomio Iwasaki, Hiroyuki Ohta, Shinpei Iijima, Isamu Asano, Yuzuru Ohji, Yoshitaka Nakamura
  • Publication number: 20040261931
    Abstract: This invention relates to a method of manufacturing a thermal laminate by laminating a first substrate film layer and a second substrate film layer through an adhesive resin layer, which comprises
    Type: Application
    Filed: April 26, 2004
    Publication date: December 30, 2004
    Inventors: Toshiyuki Narumiya, Isamu Asano, Hiroshi Kasahara, Ryoji Tanaka
  • Publication number: 20040248362
    Abstract: A semiconductor device includes memory cells each having an MISFET for memory selection formed on one major surface of a semiconductor substrate and a capacitive element comprised of a lower electrode electrically connected at a bottom portion to one of a source and drain of the MISFET for memory selection via a first metal layer and an upper electrode formed on the lower electrode via a capacitive insulating film. The lower electrode has a thickness of 30 nm or greater at the bottom portion thereof. Sputtering with a high ionization ratio and high directivity, such as PCM, is adapted to the formation of the lower electrode to make only the bottom portion of a capacitor thicker.
    Type: Application
    Filed: February 13, 2004
    Publication date: December 9, 2004
    Applicants: ELPIDA MEMORY, INC., Hitachi ULSI Systems, Co., Ltd., HITACHI LTD.
    Inventors: Yoshitaka Nakamura, Hidekazu Goto, Isamu Asano, Mitsuhiro Horikawa, Keiji Kuroki, Hiroshi Sakuma, Kenichi Koyanagi, Tsuyoshi Kawagoe
  • Patent number: 6815762
    Abstract: In a process for manufacturing a semiconductor integrated circuit device having a MISFET, in order that a shallow junction between the source/drain of the MISFET and a semiconductor substrate may be realized by reducing the number of heat treatment steps, all conductive films to be deposited on the semiconductor substrate are deposited at a temperature of 500° C. or lower at a step after the MISFET has been formed. Moreover, all insulating films to be deposited over the semiconductor substrate are deposited at a temperature of 500° C. or lower at a step after the MISFET has been formed.
    Type: Grant
    Filed: October 13, 1999
    Date of Patent: November 9, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Makoto Yoshida, Takahiro Kumauchi, Yoshitaka Tadaki, Kazuhiko Kajigaya, Hideo Aoki, Isamu Asano
  • Patent number: 6809364
    Abstract: A DRAM of an open bit line structure has a cell area smaller than that of a DRAM of a folded bit line structure and is susceptible to noise. A conventional DRAM of an open bit line structure has a large bit line capacitance and is susceptible to noise or has a large cell area. There has been no DRAM of an open bit line structure having a small bit line capacitance, unsusceptible to noise and having a small cell area. The present invention forms capacitor lower electrode plug holes not aligned with bit lines to reduce bit line capacitance. Bit lines are formed in a small width, capacitor lower electrode plugs are dislocated from positions corresponding to the centers of the bit lines in directions away from the bit lines and the contacts are formed in a reduced diameter to avoid increasing the cell area. Thus a semiconductor storage device of an open bit line structure resistant to noise and having a small cell area is provided.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: October 26, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Hideyuki Matsuoka, Satoru Yamada, Isamu Asano, Ryo Nagai, Tomonori Sekiguchi, Riichiro Takemura
  • Publication number: 20040198067
    Abstract: With a view to preventing the oxidation of a metal film at the time of light oxidation treatment after gate patterning and at the same time to making it possible to control the reproducibility of oxide film formation and homogeneity of oxide film thickness at gate side-wall end portions, in a gate processing step using a poly-metal, a gate electrode is formed by patterning a gate electrode material which has been deposited over a semiconductor wafer 1A having a gate oxide film formed thereon and has a poly-metal structure and then, the principal surface of the semiconductor wafer 1A heated to a predetermined temperature or vicinity thereof is supplied with a hydrogen gas which contains water at a low concentration, the water having been formed from hydrogen and oxygen by a catalytic action, to selectively oxidize the principal surface of the semiconductor wafer 1A, whereby the profile of the side-wall end portions of the gate electrode is improved.
    Type: Application
    Filed: April 12, 2004
    Publication date: October 7, 2004
    Inventors: Yoshikazu Tanabe, Isamu Asano, Makoto Yoshida, Naoki Yamamoto, Masayoshi Saito, Nobuyoshi Natsuaki
  • Patent number: 6784116
    Abstract: With a view to preventing the oxidation of a metal film at the time of light oxidation treatment after gate patterning and at the same time to making it possible to control the reproducibility of oxide film formation and homogeneity of oxide film thickness at gate side-wall end portions, in a gate processing step using a poly-metal, a gate electrode is formed by patterning a gate electrode material which has been deposited over a semiconductor wafer 1A having a gate oxide film formed thereon and has a poly-metal structure and then, the principal surface of the semiconductor wafer 1A heated to a predetermined temperature or vicinity thereof is supplied with a hydrogen gas which contains water at a low concentration, the water having been formed from hydrogen and oxygen by a catalytic action, to selectively oxidize the principal surface of the semiconductor wafer 1A, whereby the profile of the side-wall end portions of the gate electrode is improved.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: August 31, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Yoshikazu Tanabe, Isamu Asano, Makoto Yoshida, Naoki Yamamoto, Masayoshi Saito, Nobuyoshi Natsuaki
  • Patent number: 6781172
    Abstract: A semiconductor device equipped with information storage capacitor comprising a first capacitor electrode, an oxide film, a second capacitor electrode and insulating films containing silicon as a main constituting element, wherein at least one of first and second capacitor electrodes contains as a main constituting element at least one element selected from rhodium, ruthenium, iridium, osmium and platinum, and as an adding element at least one element selected from palladium, nickel, cobalt and titanium, is excellent in adhesiveness between the capacitor electrodes and the insulating films.
    Type: Grant
    Filed: March 8, 2001
    Date of Patent: August 24, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Moriya, Tomio Iwasaki, Hiroyuki Ohta, Shinpei Iijima, Isamu Asano, Yuzuru Ohji, Yoshitaka Nakamura
  • Publication number: 20040155289
    Abstract: A method of manufacturing a semiconductor integrated circuit device having a switching MISFET and a capacitor element formed over a semiconductor substrate, such as a DRAM, is disclosed. The dielectric film of the capacitor element is formed to be co-extensive with the capacitor electrode layer over it. The upper electrode of the capacitor element is formed to be larger than the lower electrode.
    Type: Application
    Filed: February 10, 2004
    Publication date: August 12, 2004
    Inventors: Jun Murata, Yoshitaka Tadaki, Isamu Asano, Mitsuaki Horiuchi, Jun Sugiura, Hiroko Kaneko, Shinji Shimizu, Atsushi Hiraiwa, Hidetsugu Ogishi, Masakazu Sagawa, Masami Ozawa, Toshihiro Sekiguchi
  • Patent number: 6756262
    Abstract: Conduction reliability between a capacitor upper electrode and a plug connected to an upper layer wire is kept high to prevent connection defects and to reduce the resistance of the capacitor upper electrode. In a capacitor of a DRAM comprising a lower electrode 45 made of ruthenium, a capacitor insulating film 50 made of BST and an upper electrode 49, the upper electrode 49 has a laminate structure comprising a ruthenium film 47 formed on the side of the capacitor insulating film 50 and a tungsten film 48 formed over the former.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: June 29, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Yoshitaka Nakamura, Isamu Asano, Satoru Yamada, Tsugio Takahashi, Yuzuru Ohji, Masayoshi Hirasawa, Takashi Yunogami, Tomonori Sekiguchi