Patents by Inventor Naohiro Hosoda

Naohiro Hosoda 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: 20240179906
    Abstract: A semiconductor structure includes an alternating stack of insulating layers and electrically conductive layers, memory openings vertically extending through the alternating stack, and memory opening fill structures located in the memory openings and including a respective vertical semiconductor channel and a respective vertical stack of memory cells. An integrated line-and-via structure is provided, which is a unitary structure including a metallic plate portion that is a portion of or laterally contacts an electrically conductive layer, and a metallic via portion that vertically extends through dielectric material plates that overlie the metallic plate portion.
    Type: Application
    Filed: July 14, 2023
    Publication date: May 30, 2024
    Inventors: Naohiro HOSODA, Kazuki ISOZUMI, Takayuki MAEKURA, Hiroyuki OGAWA, Koichi MATSUNO
  • Publication number: 20240179908
    Abstract: A memory device includes a first-tier alternating stack of first insulating layers and first electrically conductive layers, a source layer overlying the first-tier alternating stack, a second-tier alternating stack of second insulating layers and second electrically conductive layers overlying the source layer, a memory opening vertically extending through the first-tier alternating stack, the source layer, and the second-tier alternating stack, and a memory opening fill structure located in the memory opening. The memory opening fill structure includes a vertical semiconductor channel that extends through the first-tier alternating stack, the source layer, and the second-tier alternating stack. The vertical semiconductor channel has sidewall in contact with the source layer.
    Type: Application
    Filed: July 17, 2023
    Publication date: May 30, 2024
    Inventors: Naohiro HOSODA, Kazuki ISOZUMI, Masanori TSUTSUMI
  • Patent number: 11894298
    Abstract: A semiconductor structure includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, memory openings vertically extending through the alternating stack, memory opening fill structures located in the memory openings, where each of the memory opening fill structures contains a memory film and a vertical semiconductor channel that extend vertically, and each memory film includes a crystalline blocking dielectric metal oxide layer, and a metal oxide amorphous dielectric nucleation layer located between each of the vertically neighboring electrically conductive layers and insulating layers, and located between each of the crystalline blocking dielectric metal oxide layers and each of the electrically conductive layers.
    Type: Grant
    Filed: March 22, 2022
    Date of Patent: February 6, 2024
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Masanori Tsutsumi, Naohiro Hosoda, Shuichi Hamaguchi, Kazuki Isozumi, Genta Mizuno, Yusuke Mukae, Ryo Nakamura, Yu Ueda
  • Publication number: 20240038667
    Abstract: A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers, a composite insulating cap layer located over the alternating stack, memory openings vertically extending through the composite insulating cap layer and the alternating stack, and memory opening fill structures located in the memory openings. Each of the memory opening fill structures includes a vertical semiconductor channel and a vertical stack of memory elements. The composite insulating layer includes a bottom insulating cap layer, a top insulating cap layer, and an etch-stop dielectric layer located between the bottom insulating cap layer and the top insulating cap layer.
    Type: Application
    Filed: July 26, 2022
    Publication date: February 1, 2024
    Inventors: Ryo Nakamura, Naohiro Hosoda
  • Publication number: 20220270967
    Abstract: A semiconductor structure includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, memory openings vertically extending through the alternating stack, memory opening fill structures located in the memory openings, where each of the memory opening fill structures includes a memory film and a vertical semiconductor channel that extend vertically, and each memory film includes a first metal oxide blocking dielectric layer, and a second metal oxide blocking dielectric layer located between each of the vertically neighboring electrically conductive layers and insulating layers, and located between each of the first metal oxide blocking dielectric layers and each of the electrically conductive layers.
    Type: Application
    Filed: May 12, 2022
    Publication date: August 25, 2022
    Inventors: Naohiro HOSODA, Masanori TSUTSUMI
  • Patent number: 11417621
    Abstract: A memory die includes an alternating stack of insulating layers and electrically conductive layers located between a drain-side dielectric layer and a source-side dielectric layer. Memory openings vertically extend through the alternating stack. Each of the memory openings has a greater lateral dimension an interface with the source-side dielectric layer than at an interface with the drain-side dielectric layer. Memory opening fill structures are located in the memory openings. Each of the memory opening fill structures includes a vertical semiconductor channel, a vertical stack of memory elements, and a drain region. A logic die may be bonded to a source-side dielectric layer side of the memory die.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: August 16, 2022
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Naohiro Hosoda, Masanori Tsutsumi, Sayako Nagamine
  • Publication number: 20220216145
    Abstract: A semiconductor structure includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, memory openings vertically extending through the alternating stack, memory opening fill structures located in the memory openings, where each of the memory opening fill structures contains a memory film and a vertical semiconductor channel that extend vertically, and each memory film includes a crystalline blocking dielectric metal oxide layer, and a metal oxide amorphous dielectric nucleation layer located between each of the vertically neighboring electrically conductive layers and insulating layers, and located between each of the crystalline blocking dielectric metal oxide layers and each of the electrically conductive layers.
    Type: Application
    Filed: March 22, 2022
    Publication date: July 7, 2022
    Inventors: Masanori TSUTSUMI, Naohiro HOSODA, Shuichi HAMAGUCHI, Kazuki ISOZUMI, Genta MIZUNO, Yusuke MUKAE, Ryo NAKAMURA, Yu UEDA
  • Patent number: 11367733
    Abstract: A memory die includes an alternating stack of insulating layers and electrically conductive layers located between a drain-side dielectric layer and a source-side dielectric layer. Memory openings vertically extend through the alternating stack. Each of the memory openings has a greater lateral dimension an interface with the source-side dielectric layer than at an interface with the drain-side dielectric layer. Memory opening fill structures are located in the memory openings. Each of the memory opening fill structures includes a vertical semiconductor channel, a vertical stack of memory elements, and a drain region. A logic die may be bonded to a source-side dielectric layer side of the memory die.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: June 21, 2022
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Naohiro Hosoda, Masanori Tsutsumi, Kota Funayama
  • Publication number: 20220181343
    Abstract: A memory die includes an alternating stack of insulating layers and electrically conductive layers located between a drain-side dielectric layer and a source-side dielectric layer. Memory openings vertically extend through the alternating stack. Each of the memory openings has a greater lateral dimension an interface with the source-side dielectric layer than at an interface with the drain-side dielectric layer. Memory opening fill structures are located in the memory openings. Each of the memory opening fill structures includes a vertical semiconductor channel, a vertical stack of memory elements, and a drain region. A logic die may be bonded to a source-side dielectric layer side of the memory die.
    Type: Application
    Filed: December 7, 2020
    Publication date: June 9, 2022
    Inventors: Naohiro HOSODA, Masanori TSUTSUMI, Kota FUNAYAMA
  • Publication number: 20220181283
    Abstract: A memory die includes an alternating stack of insulating layers and electrically conductive layers located between a drain-side dielectric layer and a source-side dielectric layer. Memory openings vertically extend through the alternating stack. Each of the memory openings has a greater lateral dimension an interface with the source-side dielectric layer than at an interface with the drain-side dielectric layer. Memory opening fill structures are located in the memory openings. Each of the memory opening fill structures includes a vertical semiconductor channel, a vertical stack of memory elements, and a drain region. A logic die may be bonded to a source-side dielectric layer side of the memory die.
    Type: Application
    Filed: December 7, 2020
    Publication date: June 9, 2022
    Inventors: Naohiro HOSODA, Masanori TSUTSUMI, Sayako NAGAMINE
  • Patent number: 11289416
    Abstract: A semiconductor structure includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, memory openings vertically extending through the alternating stack, memory opening fill structures located in the memory openings, where each of the memory opening fill structures contains a memory film and a vertical semiconductor channel that extend vertically, and each memory film includes a crystalline blocking dielectric metal oxide layer, and a metal oxide amorphous dielectric nucleation layer located between each of the vertically neighboring electrically conductive layers and insulating layers, and located between each of the crystalline blocking dielectric metal oxide layers and each of the electrically conductive layers.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: March 29, 2022
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Masanori Tsutsumi, Naohiro Hosoda, Shuichi Hamaguchi, Kazuki Isozumi, Genta Mizuno, Yusuke Mukae, Ryo Nakamura, Yu Ueda
  • Publication number: 20210159167
    Abstract: A semiconductor structure includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, memory openings vertically extending through the alternating stack, memory opening fill structures located in the memory openings, where each of the memory opening fill structures contains a memory film and a vertical semiconductor channel that extend vertically, and each memory film includes a crystalline blocking dielectric metal oxide layer, and a metal oxide amorphous dielectric nucleation layer located between each of the vertically neighboring electrically conductive layers and insulating layers, and located between each of the crystalline blocking dielectric metal oxide layers and each of the electrically conductive layers.
    Type: Application
    Filed: November 26, 2019
    Publication date: May 27, 2021
    Inventors: Masanori TSUTSUMI, Naohiro HOSODA, Shuichi HAMAGUCHI, Kazuki ISOZUMI, Genta MIZUNO, Yusuke MUKAE, Ryo NAKAMURA, Yu Yu UEDA
  • Patent number: 11018152
    Abstract: First memory openings are formed through a first alternating stack of first insulating layers and first spacer material layers. Each first memory opening is filled with a first memory film, a sacrificial dielectric liner, and a first-tier opening fill material portion. Second memory openings are formed through a second alternating stack of second insulating layers and second spacer material layers. A second memory film is formed in each second memory opening. The first-tier opening fill material portions are removed selective to the sacrificial dielectric liners. The sacrificial dielectric liners are removed selective to the second memory films and the first memory films. A vertical semiconductor channel can be formed on each vertical stack of a first memory film and a second memory film.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: May 25, 2021
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Tatsuya Hinoue, Kengo Kajiwara, Ryousuke Itou, Naohiro Hosoda
  • Patent number: 11011506
    Abstract: A bonded assembly includes a memory die including a three-dimensional memory array located on a first single crystalline semiconductor substrate, and a logic die including a peripheral circuitry located on a second single crystalline semiconductor substrate and bonded to the memory die. The three-dimensional memory array includes word lines and bit lines. The logic die includes field effect transistors having semiconductor channels configured to flow electrical current along a channel direction that is parallel to the bit lines or word lines. Different crystallographic orientations are used for the first and second single crystalline semiconductor substrates. The crystallographic orientations of the first single crystalline semiconductor substrate are selected to minimize stress deformation of the memory chip, while the crystallographic orientations of the second single crystalline semiconductor substrate are selected to maximize device performance of the peripheral circuitry.
    Type: Grant
    Filed: April 14, 2020
    Date of Patent: May 18, 2021
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Naohiro Hosoda, Kazuma Shimamoto, Tetsuya Shirasu, Yuji Fukano, Akio Nishida
  • Patent number: 10903237
    Abstract: Memory stack structures and dielectric wall structures are formed through a vertically alternating sequence of continuous insulating layers and continuous sacrificial material layers. Backside trenches are formed to divide the vertically alternating sequence into multiple alternating stacks. First portions of the continuous sacrificial material layers are replaced with electrically conductive layers. A connection region including a pair of dielectric wall structures is provided between a first memory array region and a second memory array region of a first alternating stack. Second portions of the continuous sacrificial material layers remain between the pair of dielectric wall structures as a vertical stack of dielectric plates. An upper subset of the first electrically conductive layers is patterned and is divided into multiple discrete portions. The multiple discrete portions are electrically connected by a respective set of connection metal interconnect structures.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: January 26, 2021
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Naohiro Hosoda, Hiroyuki Ogawa, Yuki Mizutani
  • Publication number: 20210005627
    Abstract: First memory openings are formed through a first alternating stack of first insulating layers and first spacer material layers. Each first memory opening is filled with a first memory film, a sacrificial dielectric liner, and a first-tier opening fill material portion. Second memory openings are formed through a second alternating stack of second insulating layers and second spacer material layers. A second memory film is formed in each second memory opening. The first-tier opening fill material portions are removed selective to the sacrificial dielectric liners. The sacrificial dielectric liners are removed selective to the second memory films and the first memory films. A vertical semiconductor channel can be formed on each vertical stack of a first memory film and a second memory film.
    Type: Application
    Filed: July 5, 2019
    Publication date: January 7, 2021
    Inventors: Tatsuya HINOUE, Kengo KAJIWARA, Ryosuke ITOU, Naohiro HOSODA, Yohei MASAMORI, Kota FUNAYAMA, Keisuke TSUKAMOTO, Hirofumi WATATANI
  • Publication number: 20200258876
    Abstract: A bonded assembly includes a memory die including a three-dimensional memory array located on a first single crystalline semiconductor substrate, and a logic die including a peripheral circuitry located on a second single crystalline semiconductor substrate and bonded to the memory die. The three-dimensional memory array includes word lines and bit lines. The logic die includes field effect transistors having semiconductor channels configured to flow electrical current along a channel direction that is parallel to the bit lines or word lines. Different crystallographic orientations are used for the first and second single crystalline semiconductor substrates. The crystallographic orientations of the first single crystalline semiconductor substrate are selected to minimize stress deformation of the memory chip, while the crystallographic orientations of the second single crystalline semiconductor substrate are selected to maximize device performance of the peripheral circuitry.
    Type: Application
    Filed: April 14, 2020
    Publication date: August 13, 2020
    Inventors: Naohiro HOSODA, Kazuma SHIMAMOTO, Tetsuya SHIRASU, Yuji FUKANO, Akio NISHIDA
  • Patent number: 10665580
    Abstract: A bonded assembly includes a memory die including a three-dimensional memory array located on a first single crystalline semiconductor substrate, and a logic die including a peripheral circuitry located on a second single crystalline semiconductor substrate and bonded to the memory die. The three-dimensional memory array includes word lines and bit lines. The logic die includes field effect transistors having semiconductor channels configured to flow electrical current along a channel direction that is parallel to the bit lines or word lines. Different crystallographic orientations are used for the first and second single crystalline semiconductor substrates. The crystallographic orientations of the first single crystalline semiconductor substrate are selected to minimize stress deformation of the memory chip, while the crystallographic orientations of the second single crystalline semiconductor substrate are selected to maximize device performance of the peripheral circuitry.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: May 26, 2020
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Naohiro Hosoda, Kazuma Shimamoto, Tetsuya Shirasu, Yuji Fukano, Akio Nishida
  • Patent number: 10453798
    Abstract: A three-dimensional memory device includes laterally spaced apart vertically alternating stacks of insulating strips and word line electrically conductive strips located over a substrate, memory stack structures extending through the multiple vertically alternating stacks, word line contact via structures contacting a top surface of the respective word line electrically conductive strips, field effect transistors overlying the word line contact via structures, and connector line structures which are electrically connected to respective subsets of the word line electrically conductive strips in different vertically alternating stacks through the field effect transistors.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: October 22, 2019
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Masanori Tsutsumi, Naohiro Hosoda
  • Patent number: 10347647
    Abstract: A memory device contains a stack of insulating layers and electrically conductive word line layers, at least one first drain select gate electrode located over the stack and extending through a first drain select transistor and a second drain select transistor, at least one second drain select gate electrode located between the first drain select electrode and the stack, and extending through a third drain select transistor and a fourth drain select transistor. The first drain select transistor and the third drain select transistor are located in a first NAND memory string. The second drain select transistor and the fourth drain select transistor are located in a second NAND memory string different from the first NAND memory string. The first drain select transistor has a higher threshold voltage than the second drain select transistor. The third drain select transistor has a lower threshold voltage than the fourth drain select transistor.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: July 9, 2019
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Naohiro Hosoda, Keisuke Shigemura, Junichi Ariyoshi, Kazuki Kajitani, Yuji Fukano