公开(公告)号：US20230413530A1

公开(公告)日：2023-12-21

申请号：US18178474

申请日：2023-03-03

Applicant: Kioxia Corporation

Inventor： Akifumi GAWASE ,  Shuntaro YAMASHITA

IPC: H10B12/00

CPC classification number: H10B12/33 ,  H10B12/05

Abstract: According to one embodiment, a semiconductor device includes first and second electrodes comprising a metal oxide an oxide semiconductor layer between the first and second electrodes, a gate electrode surrounding the oxide semiconductor layer, a gate insulating layer, a first insulating layer between the first and gate electrodes, a second insulating layer between the second and gate electrodes, a first conductive layer contacting the surface of the first electrode, a second conductive layer contacting the surface of second electrode, a first layer surrounding the first electrode, a second layer surrounding the second electrode, a third insulating layer between the first electrode and the first insulating layer and contacting the gate insulating layer and the first layer, and a fourth insulating layer between the second electrode and the second insulating layer and contacting the gate insulating layer and the second layer.

公开(公告)号：US20230030121A1

公开(公告)日：2023-02-02

申请号：US17964375

申请日：2022-10-12

Applicant: Kioxia Corporation

Inventor： Akifumi GAWASE ,  Atsuko SAKATA

IPC: H01L29/786 ,  H01L27/108 ,  H01L29/66 ,  H01L21/02 ,  H01L29/24

Abstract: Provided is a semiconductor device of the embodiment including: an oxide semiconductor layer; a gate electrode; a first electrode electrically connected to one portion of the oxide semiconductor layer, the first electrode including a first region, second region, a third region, and a fourth region, the first region disposed between the first portion and the second region, the first region disposed between the third region and the fourth region, the first region containing at least one element of In, Zn, Sn or Cd, and oxygen, the second region containing at least one metal element of Ti, Ta, W, or Ru, the third region and the fourth region containing the at least one metal element and oxygen, the third region and the fourth region having an atomic concentration of oxygen higher than that of the second region; and a second electrode electrically connected to another portion of the oxide semiconductor layer.

公开(公告)号：US20210305431A1

公开(公告)日：2021-09-30

申请号：US17022328

申请日：2020-09-16

Applicant: Kioxia Corporation

Inventor： Tomoki ISHIMARU ,  Shinji MORI ,  Kazuhiro MATSUO ,  Keiichi SAWA ,  Akifumi GAWASE

IPC: H01L29/786 ,  H01L27/108 ,  H01L29/08 ,  H01L29/417 ,  H01L29/40 ,  H01L29/267

Abstract: A semiconductor device of an embodiment includes a first electrode, a second electrode, a first metallic region provided between the first electrode and the second electrode and includes at least one metallic element selected from the group consisting of indium (In), gallium (Ga), zinc (Zn), aluminum (Al), magnesium (Mg), manganese (Mn), titanium (Ti), tungsten (W), molybdenum (Mo), and tin (Sn), a second metallic region provided between the first metallic region and the second electrode and includes the at least one metallic element, a semiconductor region provided between the first metallic region and the second metallic region and includes the at least one metallic element and oxygen (O), an insulating region provided between the first metallic region and the second metallic region and is surrounded by the semiconductor region, a gate electrode surrounding the semiconductor region, and a gate insulating layer provided between the semiconductor region and the gate electrode.

公开(公告)号：US20250098248A1

公开(公告)日：2025-03-20

申请号：US18828277

申请日：2024-09-09

Applicant: Kioxia Corporation

Inventor： Masaya NAKATA ,  Kota TAKAHASHI ,  Yusuke MIKI ,  Takuma DOI ,  Kazuhiro MATSUO ,  Akifumi GAWASE ,  Kenichiro TORATANI

IPC: H01L29/26 ,  C23C16/52 ,  H01J37/32 ,  H01L21/02 ,  H01L21/3213 ,  H01L29/66

Abstract: A semiconductor device manufacturing method of embodiments includes: forming a first conductive film containing indium on a substrate; forming a first insulating film; forming a second conductive film; forming a second insulating film; forming an opening penetrating the second insulating film, the second conductive film, and the first insulating film to reach the first conductive film; forming a third insulating film in the opening so as to be in contact with bottom and side surfaces of the opening; removing the third insulating film at a bottom of the opening to expose the first conductive film at the bottom of the opening; performing a first treatment using a first gas containing silicon or a second treatment using a second gas containing oxygen; and forming a semiconductor film in the opening without exposing the substrate to an atmosphere with a pressure equal to or more than atmospheric pressure.

公开(公告)号：US20240098962A1

公开(公告)日：2024-03-21

申请号：US18165595

申请日：2023-02-07

Applicant: Kioxia Corporation

Inventor： Daisuke WATANABE ,  Akifumi GAWASE ,  Takeshi IWASAKI ,  Kazuhiro KATONO ,  Yusuke MUTO ,  Yusuke MIKI ,  Akinori KIMURA

IPC: H10B10/00 ,  H01L29/786

CPC classification number: H10B10/125 ,  H01L29/78693

Abstract: A semiconductor device including a first electrode, a second electrode, an oxide semiconductor disposed between the first electrode and the second electrode, and a first oxide layer containing a predetermined element, oxygen, and an additional element and disposed between the first electrode and the oxide semiconductor, wherein the predetermined element is at least one of tantalum, boron, hafnium, silicon, zirconium, or niobium, and the additional element is at least one of phosphorus, sulfur, copper, zinc, gallium, germanium, arsenic, selenium, silver, indium, tin, antimony, tellurium, or bismuth.

公开(公告)号：US20240097044A1

公开(公告)日：2024-03-21

申请号：US18456419

申请日：2023-08-25

Applicant: Kioxia Corporation

Inventor： Yusuke KASAHARA ,  Kappei IMAMURA ,  Akifumi GAWASE ,  Shinji MORI ,  Akihiro KAJITA

IPC: H01L29/786 ,  H01L29/417 ,  H10B12/00

CPC classification number: H01L29/78696 ,  H01L29/41733 ,  H01L29/78642 ,  H01L29/7869 ,  H10B12/05 ,  H10B12/33

Abstract: According to one embodiment, a semiconductor device includes a first conductive layer between first and second insulating layers with an oxide semiconductor column extending in the first direction through these layers. A third insulating layer covers the column. The column has a first semiconductor portion at a first position matching the first insulating layer, a second semiconductor portion at a second position matching second insulating layer, and a third semiconductor portion at a third position matching the first conductive layer. The first semiconductor portion is continuous along a second direction between the third insulating layer, the second semiconductor portion is continuous along the second direction between the third insulating layer, but the third semiconductor portion is not continuous between the third insulating layer.

公开(公告)号：US20230200050A1

公开(公告)日：2023-06-22

申请号：US17841129

申请日：2022-06-15

Applicant: Kioxia Corporation

Inventor： Akifumi GAWASE ,  Ha HOANG ,  Atsuko SAKATA ,  Yuta KAMIYA ,  Kazuhiro MATSUO ,  Keiichi SAWA ,  Kota TAKAHASHI ,  Kenichiro TORATANI ,  Yimin LIU

IPC: H01L27/108 ,  H01L29/786 ,  H01L29/66

CPC classification number: H01L27/10805 ,  H01L29/78642 ,  H01L29/7869 ,  H01L29/66969 ,  H01L27/10873

Abstract: A semiconductor device of embodiments includes: a first electrode; a second electrode; an oxide semiconductor layer between the first electrode and the second electrode; a gate electrode surrounding the oxide semiconductor layer; a gate insulating layer between the gate electrode and the oxide semiconductor layer; a first insulating layer provided between the first electrode and the gate electrode; and a second insulating layer provided between the second electrode and the gate electrode. In a cross section parallel to a first direction from the first electrode to the second electrode, a first portion of the oxide semiconductor layer is provided between the gate insulating layer and the first electrode. In the cross section, a second portion of the oxide semiconductor layer is provided between the gate insulating layer and the second electrode.

公开(公告)号：US20220302320A1

公开(公告)日：2022-09-22

申请号：US17447330

申请日：2021-09-10

Applicant: Kioxia Corporation

Inventor： Akifumi GAWASE ,  Atsuko SAKATA

IPC: H01L29/786 ,  H01L27/108 ,  H01L29/24 ,  H01L21/02 ,  H01L29/66

Abstract: Provided is a semiconductor device of the embodiment including: an oxide semiconductor layer; a gate electrode; a first electrode electrically connected to one portion of the oxide semiconductor layer, the first electrode including a first region, second region, a third region, and a fourth region, the first region disposed between the first portion and the second region, the first region disposed between the third region and the fourth region, the first region containing at least one element of In, Zn, Sn or Cd, and oxygen, the second region containing at least one metal element of Ti, Ta, W, or Ru, the third region and the fourth region containing the at least one metal element and oxygen, the third region and the fourth region having an atomic concentration of oxygen higher than that of the second region; and a second electrode electrically connected to another portion of the oxide semiconductor layer.