Patents by Inventor Yukio Hayakawa

Yukio Hayakawa 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: 8143661
    Abstract: A memory cell system is provided including a first insulator layer over a semiconductor substrate, a charge trap layer over the first insulator layer, and slot where the charge trap layer includes a second insulator layer having the characteristic of being grown.
    Type: Grant
    Filed: October 10, 2006
    Date of Patent: March 27, 2012
    Assignees: Spansion LLC, Advanced Micro Devices, Inc.
    Inventors: Shenqing Fang, Rinji Sugino, Jayendra Bhakta, Takashi Orimoto, Hiroyuki Nansei, Yukio Hayakawa, Takayuki Maruyama, Hidehiko Shiraiwa, Kuo-Tung Chang, Lei Xue, Meng Ding, Amol Ramesh Joshi, YouSeok Suh, Harpreet Sachar
  • Publication number: 20120069632
    Abstract: Provided is a current steering element that can prevent write didturb even when an electrical pulse with different polarities is applied and that can cause a large current to flow through a variable resistance element. The current steering element includes a first electrode (32), a second electrode (31), and a current steering layer (33). The current steering layer (33) comprises SiNx (where 0<x?0.85) added with hydrogen or fluorine. When D (D=D0×1022 atoms/cm3) represents a density of hydrogen or fluorine, d (nm) represents a thickness of the current steering layer (33), and V0 (V) represents a maximum value applicable to between the first electrode (32) and the second electrode (31), D, x, d, and V0 satisfy the following Formulae. (ln(10000(C·exp(?·d)exp(?·x))?1)?)2?V0 (ln(1000(C·exp(?·d)exp(?·x))?1)?)2?(ln(10000(C·exp(?·d)exp(?·x))?1)?)2/2?0 wherein C=k1×D0k2, and ?, ?, ?, k1, and k2 are constants.
    Type: Application
    Filed: March 10, 2011
    Publication date: March 22, 2012
    Inventors: Yukio Hayakawa, Koji Arita, Takumi Mikawa, Takeki Ninomiya
  • Publication number: 20120068148
    Abstract: A variable resistance nonvolatile memory element capable of suppressing a variation in resistance values is provided.
    Type: Application
    Filed: March 7, 2011
    Publication date: March 22, 2012
    Inventors: Yoshio Kawashima, Takumi Mikawa, Yukio Hayakawa
  • Publication number: 20120063201
    Abstract: A nonvolatile memory element which can be initialized at low voltage includes a variable resistance layer (116) located between a lower electrode (105) and an upper electrode (107) and having a resistance value that reversibly changes based on electrical signals applied between these electrodes. The variable resistance layer (116) includes at least two layers: a first variable resistance layer (1161) including a first transition metal oxide (116b); and a second variable resistance layer (1162) including a second transition metal oxide (116a) and a third transition metal oxide (116c). The second transition metal oxide (116a) has an oxygen deficiency higher than either oxygen deficiency of the first transition metal oxide (116b) or the third transition metal oxide (116c), and the second transition metal oxide (116a) and the third transition metal oxide (116c) are in contact with the first variable resistance layer (1161).
    Type: Application
    Filed: March 16, 2011
    Publication date: March 15, 2012
    Inventors: Yukio Hayakawa, Takumi Mikawa, Yoshio Kawashima, Takeki Ninomiya
  • Publication number: 20110233651
    Abstract: Devices and methods for isolating adjacent charge accumulation layers in a semiconductor device are disclosed. In one embodiment, a semiconductor device comprises a bit line formed in a semiconductor substrate, a charge accumulation layer formed on the semiconductor substrate, a word line formed on the charge accumulation layer across the bit line, and a channel region formed in the semiconductor substrate below the word line and between the bit line and its adjacent bit line. For the semiconductor device, the charge accumulation layer is formed above the channel region in a widthwise direction of the word line, and a width of the word line is set to be narrower than a distance between an end of the channel region and a central part of the channel region in a lengthwise direction of the word line.
    Type: Application
    Filed: June 8, 2011
    Publication date: September 29, 2011
    Inventors: Fumihiko INOUE, Haruki SOUMA, Yukio HAYAKAWA
  • Patent number: 8003468
    Abstract: Devices and methods for isolating adjacent charge accumulation layers in a semiconductor device are disclosed. In one embodiment, a semiconductor device comprises a bit line formed in a semiconductor substrate, a charge accumulation layer formed on the semiconductor substrate, a word line formed on the charge accumulation layer across the bit line, and a channel region formed in the semiconductor substrate below the word line and between the bit line and its adjacent bit line. For the semiconductor device, the charge accumulation layer is formed above the channel region in a widthwise direction of the word line, and a width of the word line is set to be narrower than a distance between an end of the channel region and a central part of the channel region in a lengthwise direction of the word line.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: August 23, 2011
    Assignee: Spansion LLC
    Inventors: Fumihiko Inoue, Haruki Souma, Yukio Hayakawa
  • Publication number: 20110141807
    Abstract: A semiconductor device includes an insulation layer (14) provided on a semiconductor substrate (12), a p-type semiconductor region (16) provided on the insulation layer, an isolation region (18) provided that surrounds the p-type semiconductor region to reach the insulation layer, an n-type source region (20) and an n-type drain region (22) provided on the p-type semiconductor region, a charge storage region (30) provided above the p-type semiconductor region between the n-type source region and the n-type drain region, and an voltage applying portion that applies a different voltage to the p-type semiconductor region while any of programming, erasing and reading a different data of a memory cell that has the charge storage region is being preformed.
    Type: Application
    Filed: February 11, 2011
    Publication date: June 16, 2011
    Inventor: Yukio HAYAKAWA
  • Publication number: 20110116323
    Abstract: The present invention provides a system comprising a semiconductor device, a method of controlling the semiconductor device in the system, and a method of manufacturing the semiconductor device in the system. The semiconductor device includes: a semiconductor region located in a semiconductor layer formed on an isolating layer; an ONO film on the semiconductor region; bit lines on either side of the semiconductor region, which are located in the semiconductor layer, and are in contact with the isolating layer; a device isolating region on two different sides of the semiconductor region from the sides on which the bit lines are located, the device isolating region being in contact with the isolating layer; and a first voltage applying unit that is coupled to the semiconductor region. In this semiconductor device, the semiconductor region is surrounded by the bit lines and the device isolating region, and is electrically isolated from other semiconductor regions.
    Type: Application
    Filed: January 24, 2011
    Publication date: May 19, 2011
    Inventor: Yukio HAYAKAWA
  • Patent number: 7928018
    Abstract: The application of oxynitriding treatment to electronic appliances involve the problem that N2 ions are formed to thereby damage any oxynitride film. It is intended to provide a method of plasma treatment capable of realizing high-quality oxynitriding and to provide a process for producing an electronic appliance in which use is made of the method of plasma treatment. There is provided a method of plasma treatment, comprising generating plasma with a gas for plasma excitation and introducing a treating gas in the plasma to thereby treat a treatment subject, wherein the treating gas contains nitrous oxide gas, this nitrous oxide gas introduced in a plasma of <2.24 eV electron temperature, so that the generation of ions tending to damage any insulating film is reduced to thereby realize high-quality oxynitriding. Further, there is provided a process for producing an electronic appliance in which use is made of the method of plasma treatment.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: April 19, 2011
    Assignee: Foundation for Advancement of International Science
    Inventors: Tadahiro Ohmi, Akinobu Teramoto, Hiroshi Yamauchi, Yukio Hayakawa
  • Patent number: 7915663
    Abstract: A semiconductor device includes an insulation layer (14) provided on a semiconductor substrate (12), a p-type semiconductor region (16) provided on the insulation layer, an isolation region (18) provided that surrounds the p-type semiconductor region to reach the insulation layer, an n-type source region (20) and an n-type drain region (22) provided on the p-type semiconductor region, a charge storage region (30) provided above the p-type semiconductor region between the n-type source region and the n-type drain region, and an voltage applying portion that applies a different voltage to the p-type semiconductor region while any of programming, erasing and reading a different data of a memory cell that has the charge storage region is being preformed.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: March 29, 2011
    Assignee: Spansion LLC
    Inventor: Yukio Hayakawa
  • Patent number: 7902590
    Abstract: The present invention provides a system comprising a semiconductor device, a method of controlling the semiconductor device in the system, and a method of manufacturing the semiconductor device in the system. The semiconductor device includes: a semiconductor region located in a semiconductor layer formed on an isolating layer; an ONO film on the semiconductor region; bit lines on either side of the semiconductor region, which are located in the semiconductor layer, and are in contact with the isolating layer; a device isolating region on two different sides of the semiconductor region from the sides on which the bit lines are located, the device isolating region being in contact with the isolating layer; and a first voltage applying unit that is coupled to the semiconductor region. In this semiconductor device, the semiconductor region is surrounded by the bit lines and the device isolating region, and is electrically isolated from other semiconductor regions.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: March 8, 2011
    Assignee: Spansion LLC
    Inventor: Yukio Hayakawa
  • Publication number: 20090206388
    Abstract: Devices and methods for isolating adjacent charge accumulation layers in a semiconductor device are disclosed. In one embodiment, a semiconductor device comprises a bit line formed in a semiconductor substrate, a charge accumulation layer formed on the semiconductor substrate, a word line formed on the charge accumulation layer across the bit line, and a channel region formed in the semiconductor substrate below the word line and between the bit line and its adjacent bit line. For the semiconductor device, the charge accumulation layer is formed above the channel region in a widthwise direction of the word line, and a width of the word line is set to be narrower than a distance between an end of the channel region and a central part of the channel region in a lengthwise direction of the word line.
    Type: Application
    Filed: August 20, 2008
    Publication date: August 20, 2009
    Inventors: Fumihiko INOUE, Haruki SOUMA, Yukio HAYAKAWA
  • Publication number: 20080268657
    Abstract: The application of oxynitriding treatment to electronic appliances involve the problem that N2 ions are formed to thereby damage any oxynitride film. It is intended to provide a method of plasma treatment capable of realizing high-quality oxynitriding and to provide a process for producing an electronic appliance in which use is made of the method of plasma treatment. There is provided a method of plasma treatment, comprising generating plasma with a gas for plasma excitation and introducing a treating gas in the plasma to thereby treat a treatment subject, wherein the treating gas contains nitrous oxide gas, this nitrous oxide gas introduced in a plasma of <2.24 eV electron temperature, so that the generation of ions tending to damage any insulating film is reduced to thereby realize high-quality oxynitriding. Further, there is provided a process for producing an electronic appliance in which use is made of the method of plasma treatment.
    Type: Application
    Filed: March 31, 2005
    Publication date: October 30, 2008
    Inventors: Tadahiro Ohmi, Akinobu Teramoto, Hiroshi Yamauchi, Yukio Hayakawa
  • Publication number: 20080224275
    Abstract: A semiconductor device includes bit lines provided in a semiconductor substrate; an ONO film that is provided along the surface of the semiconductor substrate and is made of a tunnel oxide film, a trap layer, and a top oxide film; and an oxide film that is provided on the surface of the semiconductor substrate in the middle between the bit lines and contacts the side face of the ONO film, in which the film thickness of the oxide film is larger than the sum of the thicknesses of the tunnel oxide film and the top oxide film, and smaller than the thickness of the ONO film.
    Type: Application
    Filed: March 14, 2008
    Publication date: September 18, 2008
    Applicant: SPANSION LLC
    Inventors: Yukio Hayakawa, Yukihiro Utsuno
  • Publication number: 20080217673
    Abstract: A semiconductor device includes a stack structure in which multiple channel layers are stacked on a substrate so as to be sandwiched between bit line layers, a gate electrode that is provided to the side of the lateral surface of an interior of a groove portion formed within the stack structure, and a charge storage layer that is provided between the gate electrode and the channel layer.
    Type: Application
    Filed: February 5, 2008
    Publication date: September 11, 2008
    Applicant: Spansion LLC
    Inventors: Takayuki Maruyama, Yukio Hayakawa, Hiroyuki Nansei
  • Publication number: 20080166853
    Abstract: A method of manufacturing a semiconductor device includes forming a silicon nitride film having an opening portion on a semiconductor substrate, forming a silicon oxide film on the silicon nitride film and on a side face of the opening portion, performing an etching treatment to the silicon oxide film so that a sidewall is formed on the side face of the opening portion, forming a trench on the semiconductor substrate with use of the sidewall and the silicon nitride film as a mask, and forming an insulating layer in the trench. The step of forming the silicon oxide film includes oxidizing the silicon nitride film with a plasma oxidation method or a radical oxidation method.
    Type: Application
    Filed: December 21, 2007
    Publication date: July 10, 2008
    Applicant: SPANSION LLC
    Inventors: Fumihiko INOUE, Yukio HAYAKAWA
  • Publication number: 20080157183
    Abstract: The present invention provides a semiconductor device that has a shorter distance between the bit lines and easily achieves higher storage capacity and density, and a method of manufacturing such a semiconductor device. The semiconductor device includes: first bit lines formed on a substrate; an insulating layer that is provided between the first bit lines on the substrate, and has a higher upper face than the first bit lines; channel layers that are provided on both side faces of the insulating layer, and are coupled to the respective first bit lines; and charge storage layers that are provided on the opposite side faces of the channel layers from the side faces on which the insulating layers are formed.
    Type: Application
    Filed: December 17, 2007
    Publication date: July 3, 2008
    Inventors: Yukio Hayakawa, Hiroyuki Nansei
  • Publication number: 20080157259
    Abstract: The present invention provides a system comprising a semiconductor device, a method of controlling the semiconductor device in the system, and a method of manufacturing the semiconductor device in the system. The semiconductor device includes: a semiconductor region located in a semiconductor layer formed on an isolating layer; an ONO film on the semiconductor region; bit lines on either side of the semiconductor region, which are located in the semiconductor layer, and are in contact with the isolating layer; a device isolating region on two different sides of the semiconductor region from the sides on which the bit lines are located, the device isolating region being in contact with the isolating layer; and a first voltage applying unit that is coupled to the semiconductor region. In this semiconductor device, the semiconductor region is surrounded by the bit lines and the device isolating region, and is electrically isolated from other semiconductor regions.
    Type: Application
    Filed: December 21, 2007
    Publication date: July 3, 2008
    Inventor: Yukio Hayakawa
  • Publication number: 20080142874
    Abstract: A method for forming an integrated circuit system is provided including forming a substrate; forming a stack over the substrate, the stack having a sidewall and formed from a charge trap layer and a semi-conducting layer; and slot plane antenna oxidizing the stack for forming a protection enclosure having a protection layer along the sidewall.
    Type: Application
    Filed: December 16, 2006
    Publication date: June 19, 2008
    Applicants: Spansion LLC, Advanced Micro Devices, Inc.
    Inventors: Shenqing Fang, Rinji Sugino, Jayendra Bhakta, Takashi Orimoto, Hiroyuki Nansei, Yukio Hayakawa, Hidehiko Shiraiwa, Takayuki Maruyama, Kuo-Tung Chang, YouSeok Suh, Amol Ramesh Joshi, Harpreet Sachar, Simon Siu-Sing Chan
  • Publication number: 20080083946
    Abstract: A memory cell system is provided including forming a first insulator layer over a semiconductor substrate, forming a charge trap layer over the first insulator layer, and slot plane antenna plasma oxidizing the charge trap layer for forming a second insulator layer.
    Type: Application
    Filed: October 10, 2006
    Publication date: April 10, 2008
    Applicants: SPANSION LLC, ADVANCED MICRO DEVICES, INC.
    Inventors: Shenqing Fang, Rinji Sugino, Jayendra Bhakta, Takashi Orimoto, Hiroyuki Nansei, Yukio Hayakawa, Takayuki Maruyama, Hidehiko Shiraiwa, Kuo-Tung Chang, Lei Xue, Meng Ding, Amol Ramesh Joshi, YouSeok Suh, Harpreet Sachar