JP7168616B2 - メモリデバイス及びそれを形成する方法 - Google Patents
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- 238000000034 method Methods 0.000 title claims description 53
- 239000000463 material Substances 0.000 claims description 86
- 239000004020 conductor Substances 0.000 claims description 58
- 239000004065 semiconductor Substances 0.000 claims description 50
- 239000011810 insulating material Substances 0.000 claims description 46
- 230000008569 process Effects 0.000 claims description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 238000004891 communication Methods 0.000 claims description 13
- 150000004767 nitrides Chemical class 0.000 claims description 11
- 229910052721 tungsten Inorganic materials 0.000 claims description 11
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 10
- 239000010937 tungsten Substances 0.000 claims description 10
- 235000012239 silicon dioxide Nutrition 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 7
- 229910052681 coesite Inorganic materials 0.000 claims description 5
- 229910052906 cristobalite Inorganic materials 0.000 claims description 5
- 229910052682 stishovite Inorganic materials 0.000 claims description 5
- 229910052905 tridymite Inorganic materials 0.000 claims description 5
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims 4
- 229910007277 Si3 N4 Inorganic materials 0.000 claims 1
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- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 4
- 229920005591 polysilicon Polymers 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-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
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 description 2
- 238000000231 atomic layer deposition Methods 0.000 description 2
- IVHJCRXBQPGLOV-UHFFFAOYSA-N azanylidynetungsten Chemical compound [W]#N IVHJCRXBQPGLOV-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000012777 electrically insulating material Substances 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
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- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000003486 chemical etching Methods 0.000 description 1
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- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
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- 238000001465 metallisation Methods 0.000 description 1
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- 238000000059 patterning Methods 0.000 description 1
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- 238000007747 plating Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76802—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics
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Description
本願は、「CONDUCTIVE STRUCTURES, SYSTEMS AND DEVICES INCLUDING CONDUCTIVE STRUCTURES AND RELATED METHODS」と題して2016年3月11日に出願された米国特許出願第15/068,329号に基づく出願日の利益を請求する。
本開示の実施形態は、導電性構造(例えば、細長い階段状導電性構造)であって導電性構造の少なくとも一部を通って延びる複数の接点(コンタクト)を有するもの、このような導電性構造を含む装置、このような導電性構造を含むシステム、このような導電性構造を製造する方法、および細長い階段状導電性構造のための電気接続を形成する方法に関する。
例えば、金属材料(例えば、W、Ni、窒化タンタル(TaN)、Pt、窒化タングステン(WN)、Au、窒化チタン(TiN)、または窒化チタンアルミニウム(TiAlN))、ポリシリコン、他の導電性材料またはこれらの組み合わせの材料から作られ得る。
いくつかの実施形態においては、内側スタックスロット要素238は、階段状構造206、208、210のサブブロック(例えば、副段、副階層、サブプレート)を画定するよう機能してもよい。
101 制御装置
102 半導体デバイス
103 導電性材料
104 基板
105 絶縁性材料
106、107、108、109、110、111 階段状構造
112 ランディング
114、116、118、120、122 段(ステップ)
126 コンタクトホール
128 導電性接点(導電性コンタクト)
130 制御部
132 アクセス線
136 選択ゲート
200 導電性構造
202 半導体デバイス
206、207、208、209、210 211 階段状構造
212 ランディング
238、240 スタックスロット要素
300 材料の積層
302 基板
304 絶縁性材料
306 犠牲材料
308 スロット
310 導電性材料
312 スロット
314 絶縁性材料
Claims (16)
- メモリデバイスであって、
垂直方向に絶縁性酸化物材料と交互に配置された導電性材料を含むスタック内の複数の階段状構造であって、前記複数の階段状構造の各々は少なくとも2つの導電性ステップを含み、前記少なくとも2つの導電性ステップのうちの各導電性ステップは、前記絶縁性酸化物材料によって、前記少なくとも2つの導電性ステップのうちの隣接する導電性ステップから少なくとも部分的に分離されている、複数の階段状構造と、
前記複数の階段状構造のうちの第1の階段状構造と前記複数の階段状構造のうちの第2の階段状構造との間に水平方向に挟まれ、且つ、前記第1の階段状構造と前記第2の階段状構造とを分離するランディングであって、該ランディングは、
垂直方向に前記絶縁性酸化物材料と交互に配置された前記導電性材料を含む前記スタックの一部分を含む外側領域と、
前記外側領域によって水平方向に包囲された内部領域であって、垂直方向に前記絶縁性酸化物材料と交互に配置された絶縁性窒化物材料と、前記絶縁性窒化物材料及び前記絶縁性酸化物材料の中を通って垂直方向に延びる複数のビアとを有する内部領域と、
を含む、ランディングと、
前記ランディングの前記内部領域の前記複数のビア内の導電性コンタクトと、
複数のアクセス線であって、前記複数のアクセス線の各々が、前記複数の階段状構造のうちの1つの前記少なくとも2つの導電性ステップのうちの1つの導電性ステップの導電性部分から、前記複数のビアのうちの1つのビア内の前記導電性コンタクトのうちの1つまで延びている、複数のアクセス線と、
前記階段状構造又は前記ランディングのうちの少なくとも一方に近接して配置された少なくとも1つの制御部であって、前記複数のビア内の前記導電性コンタクトのうちの少なくとも幾つかに動作可能に結合された少なくとも1つの制御部と、
を備えるメモリデバイス。 - 前記少なくとも1つの制御部は、ストリングドライバ回路、パスゲート、ゲートを選択するための回路、前記アクセス線を選択するための回路、信号を増幅するための回路、又は信号を検知するための回路、のうちの少なくとも1つを含む、請求項1に記載のメモリデバイス。
- 前記少なくとも1つの制御部は、前記導電性ステップのうちの所望の1つを選択するための、前記アクセス線に電気的に結合されたパスゲートを含む、請求項1に記載のメモリデバイス。
- 前記複数の階段状構造のうちの少なくとも幾つかはワード線プレート構造の一部分を含む、請求項1に記載のメモリデバイス。
- 前記ワード線プレート構造は、タングステンを含有する材料を含む、請求項4に記載のメモリデバイス。
- 前記ワード線プレート構造に電気的に接続されたワード線ドライバを更に備える、請求項4に記載のメモリデバイス。
- 前記複数の階段状構造のうちの1つの階段状構造はドレイン選択ゲート(SGD)構造の一部分を含む、請求項1に記載のメモリデバイス。
- 前記スタックの前記導電性材料はタングステン(W)を含み、前記ランディングの前記内部領域内の前記絶縁性窒化物材料は、前記導電性材料の垂直方向レベルに配置され、且つ、窒化シリコン(Si3N4)を含む、請求項1に記載のメモリデバイス。
- メモリデバイスであって、
複数の階層を含むスタックであって、前記複数の階層の各々が、タングステン(W)と、前記タングステンに垂直方向に隣接する二酸化シリコン(SiO2)とを含む、スタックと、
前記スタック内にあって、且つ、前記複数の階層の一部分によって画定された複数のステップを含む複数の階段状構造であって、前記複数の階段状構造の各々が、前記複数のステップのうちの少なくとも2つを含む、複数の階段状構造と、
前記複数の階段状構造のうちの2つの間に挟まれたランディングであって、該ランディングは、
前記複数の階層を含む前記スタックの一部分を含む外側領域であって、前記複数の階層の各々が、前記タングステン(W)と、前記タングステンに垂直方向に隣接する前記二酸化シリコン(SiO2)とを含む、外側領域と、
前記外側領域によって水平方向に包囲された内部領域であって、
追加の複数の階層であって、その各々が、窒化シリコン(Si3N4)と、垂直方向に前記窒化シリコンと交互に配置された追加の二酸化シリコン(SiO2)とを含む、追加の複数の階層と、
前記窒化シリコン(Si3N4)及び前記追加の二酸化シリコン(SiO2)の中を通って垂直方向に延びる複数のビアと、
を含む内部領域と、
を含む、ランディングと、
前記ランディングの前記内部領域の前記複数のビアの中を通って延び、且つ、前記ビアを充填する導電性コンタクトであって、該導電性コンタクトは、メモリセルに電気的に結合されたアクセス線に電気的に結合されている、導電性コンタクトと、
前記メモリセルを制御するための少なくとも1つの制御部であって、該少なくとも1つの制御部は、前記ランディングに近接して配置され、且つ、前記ランディング内の前記複数のビアのうちの1つ以上の中の前記導電性コンタクトのうちの1つ以上に電気的に結合されている、少なくとも1つの制御部と、
を備えるメモリデバイス。 - 前記スタックの前記複数の階層を通って延びる半導体ピラーを更に備える、請求項9に記載のメモリデバイス。
- 前記複数の階層のうちの少なくとも幾つかの前記タングステン(W)は複数のワード線プレートを形成する、請求項10に記載のメモリデバイス。
- 前記少なくとも1つの制御部はワード線ドライバを含む、請求項11に記載のメモリデバイス。
- 前記階段状構造に沿って延びるスタックスロット要素を更に備える、請求項9に記載のメモリデバイス。
- 前記スタックスロット要素は、置換ゲート工程において堆積された追加の導電性材料上に配置された追加の絶縁性材料を含む、請求項13に記載のメモリデバイス。
- メモリデバイスであって、
メモリセルのアレイと、
ワード線プレートの一部分を含む複数の階段状構造であって、前記ワード線プレートは前記アレイの前記メモリセルと電気的に通じている、複数の階段状構造と、
前記アレイの前記メモリセルを選択するための少なくとも1つの制御デバイスと、
前記複数の階段状構造のうちの第1の階段状構造と、前記複数の階段状構造のうちの第2の階段状構造との間に配置された少なくとも1つのランディングであって、該少なくとも1つのランディングは、
垂直方向に絶縁性酸化物材料と交互に配置された前記ワード線プレートの追加部分を含む外側領域と、
前記外側領域によって水平方向に包囲された内部領域であって、
前記ワード線プレートの垂直方向レベルに配置され、且つ、垂直方向に追加の絶縁性酸化物材料と交互に配置された絶縁性窒化物材料と、
前記絶縁性窒化物材料及び前記追加の絶縁性酸化物材料の中を通って延び、且つ、前記少なくとも1つの制御デバイスと電気的に通じている、導電的に充填された複数のビアと、
を含む内部領域と、
を含む、少なくとも1つのランディングと、
前記複数の階段状構造の前記ワード線プレートと、前記複数のビアの第1の端部とに結合されたアクセス線であって、前記複数のビアの第2の端部が前記少なくとも1つの制御デバイスに電気的に結合されている、アクセス線と、
を備えるメモリデバイス。 - メモリデバイスを形成する方法であって、
2つの階段状構造の間のランディングの中を通る複数の開口を形成することであって、前記2つの階段状構造の各々は、メモリセルと電気的に通じている導電性構造によって画定された複数のステップを有し、前記ランディングは、
前記導電性構造の一部分と、垂直方向に前記導電性構造の前記一部分と交互に配置された絶縁性酸化物材料の一部分とを含む外側領域と、
前記外側領域によって水平方向に包囲され、且つ、絶縁性窒化物材料の一部分と、垂直方向に前記絶縁性窒化物材料の前記一部分と交互に配置された前記絶縁性酸化物材料の追加部分とを含む内部領域であって、前記複数の開口は前記ランディングの前記内部領域内に配置される、内部領域と、
を含む、ことと、
前記ランディングの前記内部領域内に配置された前記複数の開口中にコンタクトを形成することと、
前記2つの階段状構造のうちの少なくとも1つの前記複数のステップのうちの少なくとも1つを画定する前記導電性構造のうちの少なくとも1つを、前記コンタクトのうちの少なくとも1つによって制御部に電気的に結合することと、
を含む方法。
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