Patents by Inventor Tohru Anezaki

Tohru Anezaki 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: 8674421
    Abstract: The semiconductor device includes a first conductor formed over a semiconductor substrate; a first insulator formed over the first conductor; a second insulator formed over the first insulator, the second insulator having an etching characteristic different from an etching characteristic of the first insulator; a second conductor formed on the second insulator, the second conductor being in contact with the second insulator; a third insulator formed over the second conductor, the third insulator having an etching characteristic different from the etching characteristic of the second insulator; a first contact hole formed through the third insulator and the second conductor, the first contact hole reaching the second insulator; a third conductor formed in the first contact hole, wherein a side wall of the third conductor is electrically connected to a side wall of the second conductor; a second contact hole formed through the third insulator and the first insulator, the second contact hole reaching the first c
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: March 18, 2014
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Taiji Ema, Tohru Anezaki
  • Patent number: 8404554
    Abstract: The method of manufacturing a semiconductor device includes a first conductor over a semiconductor substrate; forming a first insulator over the first conductor; forming a second insulator, having an etching characteristic different from an etching characteristic of the first insulator, over the first insulator; forming a second conductor on the second insulator, the second conductor being in contact with the second insulator; forming a third insulator, having an etching characteristic different from the etching characteristic of the second insulator, over the second conductor; forming a first contact hole though the third insulator and the second conductor, the first contact hole exposing the second insulator; forming a second contact hole through the third insulator and the first insulator, the second contact hole exposing the first conductor; forming a third conductor in the first contact hole, wherein a side wall of the third conductor is electrically connected to a side wall of the second conductor; form
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: March 26, 2013
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Taiji Ema, Tohru Anezaki
  • Publication number: 20100285653
    Abstract: The method of manufacturing a semiconductor device includes a first conductor over a semiconductor substrate; forming a first insulator over the first conductor; forming a second insulator, having an etching characteristic different from an etching characteristic of the first insulator, over the first insulator; forming a second conductor on the second insulator, the second conductor being in contact with the second insulator; forming a third insulator, having an etching characteristic different from the etching characteristic of the second insulator, over the second conductor; forming a first contact hole though the third insulator and the second conductor, the first contact hole exposing the second insulator; forming a second contact hole through the third insulator and the first insulator, the second contact hole exposing the first conductor; forming a third conductor in the first contact hole, wherein a side wall of the third conductor is electrically connected to a side wall of the second conductor; form
    Type: Application
    Filed: July 20, 2010
    Publication date: November 11, 2010
    Applicant: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Taiji Ema, Tohru Anezaki
  • Publication number: 20100283092
    Abstract: The semiconductor device includes a first conductor formed over a semiconductor substrate; a first insulator formed over the first conductor; a second insulator formed over the first insulator, the second insulator having an etching characteristic different from an etching characteristic of the first insulator; a second conductor formed on the second insulator, the second conductor being in contact with the second insulator; a third insulator formed over the second conductor, the third insulator having an etching characteristic different from the etching characteristic of the second insulator; a first contact hole formed through the third insulator and the second conductor, the first contact hole reaching the second insulator; a third conductor formed in the first contact hole, wherein a side wall of the third conductor is electrically connected to a side wall of the second conductor; a second contact hole formed through the third insulator and the first insulator, the second contact hole reaching the first c
    Type: Application
    Filed: July 20, 2010
    Publication date: November 11, 2010
    Applicant: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Taiji Ema, Tohru Anezaki
  • Patent number: 7795147
    Abstract: The semiconductor storage device comprises memory cell transistors formed on a semiconductor substrate 10; first insulation films 42 covering the top surfaces and the side surfaces of gate electrodes 20 of the memory cell transistors; through-holes 40 opened on first diffused layers 24; a second insulation film 36 with through-holes 40 opened on first diffused layers 24 and through-holes 38 opened on second diffused layers 26 formed in; capacitors formed on the inside walls and the bottoms of the through-holes 40 and including capacitor storage electrodes 46, connected to the first diffused layers 24; capacitor dielectric films 48 covering the capacitor storage electrodes 46, and capacitor-opposed electrodes 54 covering at least a part of the capacitor dielectric films 48; and, contact conducting films 44 formed on the inside walls and bottoms of the through-holes 38, and connected to the second diffused layers.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: September 14, 2010
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Taiji Ema, Tohru Anezaki
  • Publication number: 20080009135
    Abstract: The semiconductor storage device comprises memory cell transistors formed on a semiconductor substrate 10; first insulation films 42 covering the top surfaces and the side surfaces of gate electrodes 20 of the memory cell transistors; through-holes 40 opened on first diffused layers 24; a second insulation film 36 with through-holes 40 opened on second diffused layers 26 formed in; capacitors formed on the inside walls and the bottoms of the through-holes 40 and including capacitor storage electrodes 46, connected to the first diffused layers 24; capacitor dielectric films 48 covering the capacitor storage electrodes 46, and capacitor-opposed electrodes 54 covering at least a part of the capacitor dielectric films 48; and, contact conducting films 44 formed on the inside walls and bottoms of the through-holes 38, and connected to the second diffused layers.
    Type: Application
    Filed: May 16, 2007
    Publication date: January 10, 2008
    Applicant: FUJITSU LIMITED
    Inventors: Taiji Ema, Tohru Anezaki
  • Patent number: 6992347
    Abstract: The semiconductor storage device comprises memory cell transistors formed on a semiconductor substrate 10; first insulation films 42 covering the top surfaces and the side surfaces of gate electrodes 20 of the memory cell transistors; through-holes 40 opened on first diffused layers 24; a second insulation film 36 with through-holes 40 opened on first diffused layers 24 and through-holes 38 opened on second diffused layers 26 formed in; capacitors formed on the inside walls and the bottoms of the through-holes 40 and including capacitor storage electrodes 46, connected to the first diffused layers 24; capacitor dielectric films 48 covering the capacitor storage electrodes 46, and capacitor-opposed electrodes 54 covering at least a part of the capacitor dielectric films 48; and, contact conducting films 44 formed on the inside walls and bottoms of the through-holes 38, and connected to the second diffused layers.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: January 31, 2006
    Assignee: Fujitsu Limited
    Inventors: Taiji Ema, Tohru Anezaki
  • Patent number: 6791187
    Abstract: A semiconductor device includes a semiconductor substrate; an insulating laminate formed over the semiconductor substrate, and including a lower part and a higher part formed over the lower part; a first conductor formed in the higher part of the insulating laminate, an insulator, having an etching characteristic different from the lower part and the higher part of the insulating laminate, formed between the lower part of the insulating laminate and the first conductor, a first contact hole formed through the higher part of the insulating laminate, penetrating inside peripheral edges of the first conductor, reaching the insulator; and a second conductor filled in the first contact hole and electrically connected to the first conductor at its side wall exposed in the first contact hole.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: September 14, 2004
    Assignee: Fujitsu Limited
    Inventors: Taiji Ema, Tohru Anezaki
  • Publication number: 20040175952
    Abstract: The semiconductor storage device comprises memory cell transistors formed on a semiconductor substrate 10; first insulation films 42 covering the top surfaces and the side surfaces of gate electrodes 20 of the memory cell transistors; through-holes 40 opened on first diffused layers 24; a second insulation film 36 with through-holes 40 opened on first diffused layers 24 and through-holes 38 opened on second diffused layers 26 formed in; capacitors formed on the inside walls and the bottoms of the through-holes 40 and including capacitor storage electrodes 46, connected to the first diffused layers 24; capacitor dielectric films 48 covering the capacitor storage electrodes 46, and capacitor-opposed electrodes 54 covering at least a part of the capacitor dielectric films 48; and, contact conducting films 44 formed on the inside walls and bottoms of the through-holes 38, and connected to the second diffused layers.
    Type: Application
    Filed: March 11, 2004
    Publication date: September 9, 2004
    Applicant: FUJITSU LIMITED
    Inventors: Taiji Ema, Tohru Anezaki
  • Publication number: 20040173832
    Abstract: The semiconductor storage device comprises memory cell transistors formed on a semiconductor substrate 10; first insulation films 42 covering the top surfaces and the side surfaces of gate electrodes 20 of the memory cell transistors; through-holes 40 opened on first diffused layers 24; a second insulation film 36 with through-holes 40 opened on first diffused layers 24 and through-holes 38 opened on second diffused layers 26 formed in; capacitors formed on the inside walls and the bottoms of the through-holes 40 and including capacitor storage electrodes 46, connected to the first diffused layers 24; capacitor dielectric films 48 covering the capacitor storage electrodes 46, and capacitor-opposed electrodes 54 covering at least a part of the capacitor dielectric films 48; and, contact conducting films 44 formed on the inside walls and bottoms of the through-holes 38, and connected to the second diffused layers.
    Type: Application
    Filed: March 11, 2004
    Publication date: September 9, 2004
    Applicant: FUJITSU LIMITED
    Inventors: Taiji Ema, Tohru Anezaki
  • Patent number: 6744091
    Abstract: A semiconductor device with a self-aligned opening and a method for fabricating the same, the semiconductor device including a first conductor pattern formed over a semiconductor substrate; a first insulation film formed over the first conductor pattern; a second insulation firm formed over the first insulation film, the second insulation film having a substantially flat surface and having etching characteristics different from those of the first insulation film; a third insulation film formed over the second insulation film, the third insulation film having etching characteristics different from those of the second insulation film; a fourth insulation film formed over the third insulation film, the fourth insulation film having etching characteristics different from those of the third insulation film; an opening formed in the fourth insulation film, the third insulation film, the second insulation film, and the first insulation film, the opening being self-aligned with the first conductor pattern, a second c
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: June 1, 2004
    Assignee: Fujitsu Limited
    Inventors: Taiji Ema, Tohru Anezaki
  • Patent number: 6730574
    Abstract: The semiconductor device includes a MOSFET including a pair of impurity diffused regions formed on both sides of a gate formed on a semiconductor substrate; an insulation film covering a top of the MOSFET and having a through-hole opened on one of the impurity diffused regions formed in; and a capacitor formed at at least a part of an inside of the through-hole, the through-hole having a larger diameter inside than at a surface thereof or having a larger diameter at an intermediate part between the surface thereof and a bottom thereof than the surface and the bottom thereof.
    Type: Grant
    Filed: October 12, 2001
    Date of Patent: May 4, 2004
    Assignee: Fujitsu Limited
    Inventors: Taiji Ema, Tohru Anezaki, Junichi Mitani
  • Publication number: 20020153614
    Abstract: The semiconductor storage device comprises memory cell transistors formed on a semiconductor substrate 10; first insulation films 42 covering the top surfaces and the side surfaces of gate electrodes 20 of the memory cell transistors; through-holes 40 opened on first diffused layers 24; a second insulation film 36 with through-holes 40 opened on first diffused layers 24 and through-holes 38 opened on second diffused layers 26 formed in; capacitors formed on the inside walls and the bottoms of the through-holes 40 and including capacitor storage electrodes 46, connected to the first diffused layers 24; capacitor dielectric films 48 covering the capacitor storage electrodes 46, and capacitor-opposed electrodes 54 covering at least a part of the capacitor dielectric films 48; and, contact conducting films 44 formed on the inside walls and bottoms of the through-holes 38, and connected to the second diffused layers.
    Type: Application
    Filed: June 12, 2002
    Publication date: October 24, 2002
    Applicant: FUJITSU LIMITED
    Inventors: Taiji Ema, Tohru Anezaki
  • Patent number: 6395599
    Abstract: The semiconductor storage device comprises memory cell transistors formed on a semiconductor substrate 10; first insulation films 42 covering the top surfaces and the side surfaces of gate electrodes 20 of the memory cell transistors; through-holes 40 opened on first diffused layers 24; a second insulation film 36 with through-holes 40 opened on first diffused layers 24 and through-holes 38 opened on second diffused layers 26 formed in; capacitors formed on the inside walls and the bottoms of the though-holes 40 and including capacitor storage electrodes 46, connected to the first diffused layers 24; capacitor dielectric films 48 covering the capacitor storage electrodes 46, and capacitor-opposed electrodes 54 covering at least a part of the capacitor dielectric films 48; and, contact conducting films 44 formed on the inside walls and bottoms of the through-holes 38, and connected to the second diffused layers.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: May 28, 2002
    Assignee: Fujitsu Limited
    Inventors: Taiji Ema, Tohru Anezaki
  • Publication number: 20020024077
    Abstract: The semiconductor device comprises a MOSFET including a pair of impurity diffused regions formed on both sides of a gate formed on a semiconductor substrate; an insulation film covering a top of the MOSFET and having a through-hole opened on one of the impurity diffused regions formed in; and a capacitor formed at at least a part of an inside of the through-hole, the through-hole having a larger diameter inside than at a surface thereof or having a larger diameter at an intermediate part between the surface thereof and a bottom thereof than the surface and the bottom thereof.
    Type: Application
    Filed: October 12, 2001
    Publication date: February 28, 2002
    Applicant: Fujitsu Limited
    Inventors: Taiji Ema, Tohru Anezaki, Junichi Mitani
  • Publication number: 20020003248
    Abstract: The semiconductor device comprises a MOSFET including a pair of impurity diffused regions formed on both sides of a gate formed on a semiconductor substrate; an insulation film covering a top of the MOSFET and having a through-hole opened on one of the impurity diffused regions formed in; and a capacitor formed at at least a part of an inside of the through-hole, the through-hole having a larger diameter inside than at a surface thereof or having a larger diameter at an intermediate part between the surface thereof and a bottom thereof than the surface and the bottom thereof.
    Type: Application
    Filed: September 12, 1997
    Publication date: January 10, 2002
    Inventors: TAIJI EMA, TOHRU ANEZAKI, JUNICHI MITANI
  • Patent number: 5874756
    Abstract: The semiconductor storage device comprises memory cell transistors formed on a semiconductor substrate 10; first insulation films 42 covering the top surfaces and the side surfaces of gate electrodes 20 of the memory cell transistors; through-holes 40 opened on first diffused layers 24; a second insulation film 36 with through-holes 40 opened on first diffused layers 24 and through-holes 38 opened on second diffused layers 26 formed in; capacitors formed on the inside walls and the bottoms of the through-holes 40 and including capacitor storage electrodes 46, connected to the first diffused layers 24; capacitor dielectric films 48 covering the capacitor storage electrodes 46, and capacitor-opposed electrodes 54 covering at least a part of the capacitor dielectric films 48; and, contact conducting films 44 formed on the inside walls and bottoms of the through-holes 38, and connected to the second diffused layers.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: February 23, 1999
    Assignee: Fujitsu Limited
    Inventors: Taiji Ema, Tohru Anezaki