JP2014509454A - 電荷蓄積装置、システム、および方法 - Google Patents
電荷蓄積装置、システム、および方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000004065 semiconductor Substances 0.000 claims abstract description 106
- 239000000463 material Substances 0.000 claims abstract description 16
- 230000005641 tunneling Effects 0.000 claims abstract description 12
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 150
- 229920005591 polysilicon Polymers 0.000 claims description 150
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 62
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 34
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 34
- 239000000377 silicon dioxide Substances 0.000 claims description 31
- 235000012239 silicon dioxide Nutrition 0.000 claims description 31
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 28
- 229910052710 silicon Inorganic materials 0.000 claims description 28
- 239000010703 silicon Substances 0.000 claims description 28
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 17
- 229910052796 boron Inorganic materials 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 16
- 239000002019 doping agent Substances 0.000 claims description 13
- 239000011800 void material Substances 0.000 claims description 8
- 239000003989 dielectric material Substances 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 27
- 239000000758 substrate Substances 0.000 description 12
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 10
- 239000010408 film Substances 0.000 description 9
- 238000001020 plasma etching Methods 0.000 description 6
- 210000000352 storage cell Anatomy 0.000 description 6
- 230000015654 memory Effects 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 238000001039 wet etching Methods 0.000 description 4
- 210000004027 cell Anatomy 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 2
- 239000000908 ammonium hydroxide Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013144 data compression Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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Abstract
【選択図】図19
Description
Claims (30)
- 半導体材料の層および誘電体の層の中に開口部を形成することと、
一部分が前記層内の残りの半導体材料とは異なってドープされるように、前記開口部によって露出される半導体材料の前記層の前記一部分を処理することと、
半導体材料の前記層の前記異なってドープされる一部分が電荷蓄積構造を備える、前記層内の残りの半導体材料の少なくとも実質的に全てを除去することと、
前記電荷蓄積構造の第1の表面上にトンネリング誘電体を形成することと、
前記電荷蓄積構造の第2の表面上にインターゲート誘電体を形成することと、を含む、方法。 - 半導体材料の層および誘電体の層の中に開口部を形成することが、ポリシリコンおよび誘電体の交互層内に前記開口部を形成することを含み、一部分が前記層内の残りのポリシリコンとは異なってドープされるように、前記開口部によって露出されるポリシリコンの前記層の前記一部分を処理することが、各一部分が前記層内の残りのポリシリコンとは異なってドープされるように、前記開口部によって露出されるポリシリコンの前記層のそれぞれの前記各一部分を処理することを含む、請求項1の方法。
- 一部分が前記層内の残りの半導体材料とは異なってドープされるように、前記開口部によって露出される半導体材料の前記層の前記一部分を処理することが、ポリシリコンの層の一部分をドープすることを含み、前記層の残りのポリシリコンが、ドープされていないポリシリコンを含む、請求項1に記載の方法。
- ポリシリコンの前記層の前記一部分をドープすることが、P型ドーパントを前記開口部を通して前記開口部によって露出されるポリシリコンの前記一部分に添加することを含む、請求項3に記載の方法。
- ポリシリコンの前記層の前記一部分をドープすることが、前記開口部内にP型ポリシリコンプラグを形成することと、前記プラグから前記一部分にP型ドーパントを拡散することと、を含む、請求項3に記載の方法。
- ポリシリコンの前記層の前記一部分をドープすることが、ホウ素を埋め込むことを含む、請求項3に記載の方法。
- 開口部を形成することが、空孔を形成することを含む、請求項1に記載の方法。
- それぞれの電荷蓄積構造が、半導体構造の垂直な開口部を少なくとも部分的に包囲し、それぞれの電荷蓄積構造が、第1の誘電体によって隣接した電荷蓄積構造から分離される、複数の電荷蓄積構造を形成することと、
前記開口部内のそれぞれの電荷蓄積構造上に第2の誘電体を形成することと、
前記第2の誘電体が前記電荷蓄積構造を前記シリコンから分離する、前記垂直な開口部内の前記第2の誘電体上にシリコンを形成することと、
それぞれの電荷蓄積構造上に第3の誘電体を形成することと、
を含む、方法。 - それぞれの第3の誘電体上に金属ゲートを形成することをさらに含む、請求項8に記載の方法。
- 前記開口部が、実質的に正方形、楕円形、または円形形状を有する、請求項8に記載の方法。
- シリコンを形成することが、約3ナノメートル〜約15ナノメートルの厚さのシリコン膜を前記垂直な開口部内に形成することを含む、請求項8に記載の方法。
- 第2の誘電体を形成することが、二酸化ケイ素または窒化ケイ素を形成し、
第3の誘電体を形成することが、二酸化ケイ素および窒化ケイ素のうちの1つ以上を形成する、請求項8に記載の方法。 - 半導体構造がドープされていないポリシリコンおよび誘電体の交互層を備える、前記半導体構造内に開口部を形成することと、
前記開口部を少なくとも部分的に包囲するドープされていないポリシリコンの前記層の各一部分にドーパントを添加することと、
前記層の残りのドープされていないポリシリコンの少なくとも実質的に全てを除去することと、
ドープされたポリシリコンの前記一部分のそれぞれの対向する表面上に誘電体を形成することと、
を含む、方法。 - 前記開口部内にシリコン膜を形成することをさらに含む、請求項13に記載の方法。
- ドープされたポリシリコンの前記一部分のそれぞれに隣接する導電ゲートを形成することをさらに含む、請求項13に記載の方法。
- シリコン膜と、
第1の位置で前記シリコン膜を少なくとも部分的に包囲する第1の電荷蓄積構造と、
第2の位置で前記シリコン膜を少なくとも部分的に包囲する第2の電荷蓄積構造と、
前記第1の電荷蓄積構造と前記シリコン膜との間、および前記第2の電荷蓄積構造と前記シリコン膜との間に誘電体と、
を備える、装置。 - シリコン膜が、NANDストリングの複数の電荷蓄積トランジスタにチャネルを提供するために、約3ナノメートル〜約15ナノメートルの厚さであり、前記電荷蓄積トランジスタのうちの第1の1つが、前記第1の電荷蓄積構造と、第1のワード線の少なくとも一部分と、を備え、前記電荷蓄積トランジスタのうちの第2の1つが、前記第2の電荷蓄積構造と、第2のワード線の少なくとも一部分と、を備える、請求項16に記載の装置。
- 前記第1の電荷蓄積構造を少なくとも部分的に包囲する導電性ワード線をさらに備える、請求項16に記載の装置。
- 前記第1の電荷蓄積構造と前記ワード線との間にIGDをさらに備える、請求項18に記載の装置。
- 前記誘電体が、トンネリング誘電体を備える、請求項16に記載の装置。
- 前記シリコン膜の横断面がU字形である、請求項16に記載の装置。
- 前記第1の電荷蓄積構造と前記第2の電荷蓄積構造との間に分離誘電体をさらに備える、請求項20に記載の装置。
- 前記第1の電荷蓄積構造が、前記第1の位置の前記シリコン膜の周囲にドープされたポリシリコンの環を備える、請求項16に記載の装置。
- 前記誘電体がトンネリング誘電体を備え、前記ドープされたポリシリコンの環を少なくとも部分的に包囲するインターゲート誘電体(IGD)をさらに備える、請求項23に記載の装置。
- 前記ドープされたポリシリコンの環を少なくとも部分的に包囲するワード線をさらに備え、前記IGDが、前記ワード線と前記ドープされたポリシリコンの環との間にある、請求項24に記載の装置。
- 前記垂直な開口部内にシリコンを形成することが、U字形パイプ内にシリコンを形成することを含み、前記U字形パイプの一部分が前記垂直な開口部を備える、請求項8に記載の方法。
- 開口部を通って一対の第1の誘電体内に延在するシリコン膜と、
前記一対の第1の誘電体間の前記シリコン膜を少なくとも部分的に包囲するポリシリコンゲートと、
前記ポリシリコンゲートと前記シリコン膜との間の第2の誘電体と、
前記ポリシリコンゲートと制御ゲートとの間の第3の誘電体と、
を備える、装置。 - 前記一対の第1の誘電体が、二酸化ケイ素の一対の層を備え、
前記第2の誘電体が、二酸化ケイ素または窒化ケイ素を含み、
前記第3の誘電体が、二酸化ケイ素、窒化ケイ素、および二酸化ケイ素を含む、請求項27に記載の装置。 - 前記シリコン膜が、約3ナノメートル〜約15ナノメートルの厚さである、請求項27に記載の装置。
- 前記ポリシリコンゲートが、P型ポリシリコン、N型ポリシリコン、またはドープされていないポリシリコンを備える、請求項27に記載の装置。
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CN103403861B (zh) | 2017-05-17 |
CN103403861A (zh) | 2013-11-20 |
US20230269937A1 (en) | 2023-08-24 |
EP2678882B1 (en) | 2020-08-05 |
WO2012116207A2 (en) | 2012-08-30 |
US9754953B2 (en) | 2017-09-05 |
US20200303391A1 (en) | 2020-09-24 |
TWI515802B (zh) | 2016-01-01 |
US20160118392A1 (en) | 2016-04-28 |
EP2678882A4 (en) | 2017-01-04 |
JP5877210B2 (ja) | 2016-03-02 |
EP2678882A2 (en) | 2014-01-01 |
WO2012116207A3 (en) | 2012-12-06 |
US20140302650A1 (en) | 2014-10-09 |
US20170365614A1 (en) | 2017-12-21 |
US11581324B2 (en) | 2023-02-14 |
TW201246396A (en) | 2012-11-16 |
US10586802B2 (en) | 2020-03-10 |
US8759895B2 (en) | 2014-06-24 |
US9231117B2 (en) | 2016-01-05 |
KR101571944B1 (ko) | 2015-11-25 |
US20120217564A1 (en) | 2012-08-30 |
KR20140016301A (ko) | 2014-02-07 |
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