JP5705990B2 - 3次元構造のメモリ素子を製造する方法 - Google Patents
3次元構造のメモリ素子を製造する方法 Download PDFInfo
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- JP5705990B2 JP5705990B2 JP2013531511A JP2013531511A JP5705990B2 JP 5705990 B2 JP5705990 B2 JP 5705990B2 JP 2013531511 A JP2013531511 A JP 2013531511A JP 2013531511 A JP2013531511 A JP 2013531511A JP 5705990 B2 JP5705990 B2 JP 5705990B2
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- 238000004519 manufacturing process Methods 0.000 title claims description 33
- 238000000034 method Methods 0.000 title claims description 29
- 239000000758 substrate Substances 0.000 claims description 91
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 42
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 40
- 239000007789 gas Substances 0.000 claims description 33
- 238000005530 etching Methods 0.000 claims description 26
- 238000000151 deposition Methods 0.000 claims description 16
- MROCJMGDEKINLD-UHFFFAOYSA-N dichlorosilane Chemical compound Cl[SiH2]Cl MROCJMGDEKINLD-UHFFFAOYSA-N 0.000 claims description 12
- 238000010030 laminating Methods 0.000 claims description 10
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 9
- 229910052796 boron Inorganic materials 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 5
- AUEPDNOBDJYBBK-UHFFFAOYSA-N [Si].[C-]#[O+] Chemical compound [Si].[C-]#[O+] AUEPDNOBDJYBBK-UHFFFAOYSA-N 0.000 claims description 5
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 2
- 239000010408 film Substances 0.000 description 23
- 239000004065 semiconductor Substances 0.000 description 13
- 239000010409 thin film Substances 0.000 description 13
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 6
- 229910000077 silane Inorganic materials 0.000 description 6
- 238000003860 storage Methods 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 239000012495 reaction gas Substances 0.000 description 3
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- KPSZQYZCNSCYGG-UHFFFAOYSA-N [B].[B] Chemical compound [B].[B] KPSZQYZCNSCYGG-UHFFFAOYSA-N 0.000 description 1
- QVMHUALAQYRRBM-UHFFFAOYSA-N [P].[P] Chemical compound [P].[P] QVMHUALAQYRRBM-UHFFFAOYSA-N 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009826 distribution Methods 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
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Description
Claims (8)
- 3次元構造のメモリ素子を製造する方法において,
基板上に1つ以上の絶縁層及び1つ以上の犠牲層を交互に積層するステップ;
前記絶縁層及び前記犠牲層を貫通する貫通孔を形成するステップ;
前記貫通孔を埋めるパターンを形成するステップ;
前記絶縁層及び前記犠牲層を貫通する開口を形成するステップ;及び
前記開口を介してエッチャントを供給して前記犠牲層を除去するステップを含み,
前記絶縁層を積層するステップは,前記基板にSiH4,Si2H6,Si3H8,Si4H10を含む群から選択された1つ以上のガスとエチル系のガスを供給して第1シリコン酸化膜を蒸着するステップを含み,
前記犠牲層を積層するステップは,前記基板にジクロロシラン(SiCl2H2)を供給して第2シリコン酸化膜を蒸着するステップを含み,
前記第1シリコン酸化膜は,SiCO(Silicon Carbon Oxide)であり,
前記エッチャントは,HF又はBOEのうちいずれか1つを含み,
前記絶縁層の前記第1シリコン酸化膜及び前記犠牲層の前記第2シリコン酸化膜は,前記エッチャントに対してエッチング選択比(etch selectivity)を有し,
前記犠牲層のエッチング率は,前記絶縁層のエッチング率に比べて大きいことを特徴とする3次元構造のメモリ素子を製造する方法。 - 3次元構造のメモリ素子を製造する方法において,
基板上に1つ以上の絶縁層及び1つ以上の犠牲層を交互に積層するステップ;
前記絶縁層及び前記犠牲層を貫通する貫通孔を形成するステップ;
前記貫通孔を埋めるパターンを形成するステップ;
前記絶縁層及び前記犠牲層を貫通する開口を形成するステップ;及び
前記開口を介してエッチャントを供給して前記犠牲層を除去するステップを含み,
前記絶縁層を積層するステップは,前記基板にSiH4,Si2H6,Si3H8,Si4H10を含む群から選択された1つ以上のガスとエチル系及びメチル系のガスを含む群から選択された1以上のガスを供給して第1シリコン酸化膜を蒸着するステップを含み,
前記犠牲層を積層するステップは,前記基板にジクロロシラン(SiCl2H2)を供給して第2シリコン酸化膜を蒸着するステップを含み,
前記第1シリコン酸化膜は,SiCO(Silicon Carbon Oxide)であり,
前記絶縁層の前記第1シリコン酸化膜及び前記犠牲層の前記第2シリコン酸化膜は,前記エッチャントに対してエッチング選択比(etch selectivity)を有し,
前記犠牲層のエッチング率は,前記絶縁層のエッチング率に比べて大きいことを特徴とする3次元構造のメモリ素子を製造する方法。 - 前記基板の温度は,300乃至790℃を維持し,
前記基板の工程圧力は,10mTorr乃至250Torrを維持することを特徴とする請求項1又は2記載の3次元構造のメモリ素子を製造する方法。 - 前記第1シリコン酸化膜と前記第2シリコン酸化膜は,互いに異なる厚さを有することを特徴とする請求項1又は2記載の3次元構造のメモリ素子を製造する方法。
- 前記絶縁層及び犠牲層を交互に積層するステップは,エッジリングを用いて前記基板のエッジ部を加圧するステップをさらに含むことを特徴とする請求項1又は2記載の3次元構造のメモリ素子を製造する方法。
- 前記基板のエッジ部は,前記基板のエッジから約0.5mm乃至3mmの範囲で前記基板の内側に対して一致させることを特徴とする請求項5記載の3次元構造のメモリ素子を製造する方法。
- 前記エッジリングは,セラミック材料であることを特徴とする請求項5又は6記載の3次元構造のメモリ素子を製造する方法。
- 3次元構造のメモリ素子を製造する方法において,
基板上に1つ以上の絶縁層及び1つ以上の犠牲層を交互に積層するステップ;
前記絶縁層及び前記犠牲層を貫通する貫通孔を形成するステップ;
前記貫通孔を埋めるパターンを形成するステップ;
前記絶縁層及び前記犠牲層を貫通する開口を形成するステップ;及び
前記開口を介してエッチャントを供給して前記犠牲層を除去するステップを含み,
前記絶縁層を積層するステップは,前記基板にSiH4,Si2H6,Si3H8,Si4H10を含む群から選択された1つ以上のガスとエチル系及びメチル系のガスを含む群から選択された1以上のガスを供給して第1シリコン酸化膜を蒸着するステップを含み,
前記犠牲層を積層するステップは,前記基板にSiH4,Si2H6,Si3H8,Si4H10,ジクロロシラン(SiCl2H2)を含む群から選択された1つ以上のガスとB2H6,PH3を含む群から選択された1つ以上のガスを供給してホウ素(boron)又は燐(phosphorus)が注入された第2シリコン酸化膜を蒸着するステップを含み,
前記第1シリコン酸化膜は,SiCO(Silicon Carbon Oxide)であり,
前記絶縁層の前記第1シリコン酸化膜及び前記犠牲層の前記第2シリコン酸化膜は,前記エッチャントに対してエッチング選択比(etch selectivity)を有し,
前記犠牲層のエッチング率は,前記絶縁層のエッチング率に比べて大きいことを特徴とする3次元構造のメモリ素子を製造する方法。
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