JP2021527948A - メモリセルのための電極の製造 - Google Patents
メモリセルのための電極の製造 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title abstract description 117
- 238000000034 method Methods 0.000 claims abstract description 268
- 239000007772 electrode material Substances 0.000 claims description 156
- 239000000463 material Substances 0.000 claims description 110
- 150000004770 chalcogenides Chemical class 0.000 claims description 100
- 230000008569 process Effects 0.000 claims description 83
- 230000003746 surface roughness Effects 0.000 claims description 70
- 238000005498 polishing Methods 0.000 claims description 64
- 229910052751 metal Inorganic materials 0.000 claims description 35
- 239000002184 metal Substances 0.000 claims description 35
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 30
- 229910002090 carbon oxide Inorganic materials 0.000 claims description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 27
- 229910052799 carbon Inorganic materials 0.000 claims description 27
- 238000003860 storage Methods 0.000 claims description 23
- 230000008859 change Effects 0.000 claims description 16
- 238000000151 deposition Methods 0.000 claims description 16
- 238000005137 deposition process Methods 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 230000006399 behavior Effects 0.000 abstract description 13
- 238000009499 grossing Methods 0.000 description 28
- 239000004020 conductor Substances 0.000 description 24
- 239000000758 substrate Substances 0.000 description 22
- 229910052714 tellurium Inorganic materials 0.000 description 20
- 238000000231 atomic layer deposition Methods 0.000 description 12
- 238000005229 chemical vapour deposition Methods 0.000 description 12
- 238000005240 physical vapour deposition Methods 0.000 description 12
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 10
- 239000000956 alloy Substances 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 10
- 230000003647 oxidation Effects 0.000 description 10
- 238000007254 oxidation reaction Methods 0.000 description 10
- 238000007517 polishing process Methods 0.000 description 10
- 229910052787 antimony Inorganic materials 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 8
- 229910052711 selenium Inorganic materials 0.000 description 8
- 239000004065 semiconductor Substances 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 229910052785 arsenic Inorganic materials 0.000 description 6
- 230000008901 benefit Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 229910052763 palladium Inorganic materials 0.000 description 6
- 229910052717 sulfur Inorganic materials 0.000 description 6
- 229910018110 Se—Te Inorganic materials 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 4
- 238000011109 contamination Methods 0.000 description 4
- 229910052733 gallium Inorganic materials 0.000 description 4
- 229910052732 germanium Inorganic materials 0.000 description 4
- 229910044991 metal oxide Inorganic materials 0.000 description 4
- 150000004706 metal oxides Chemical class 0.000 description 4
- 230000000737 periodic effect Effects 0.000 description 4
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910002601 GaN Inorganic materials 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 2
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 2
- 229910005936 Ge—Sb Inorganic materials 0.000 description 2
- 229910005939 Ge—Sn Inorganic materials 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910020938 Sn-Ni Inorganic materials 0.000 description 2
- 229910020923 Sn-O Inorganic materials 0.000 description 2
- 229910018731 Sn—Au Inorganic materials 0.000 description 2
- 229910008937 Sn—Ni Inorganic materials 0.000 description 2
- 229910008772 Sn—Se Inorganic materials 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000003491 array Methods 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 229910052797 bismuth Inorganic materials 0.000 description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 239000013626 chemical specie Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000002178 crystalline material Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000005468 ion implantation Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000012782 phase change material Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
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Abstract
Description
本特許出願は、2018年6月6日に出願された「Fabrication of Electrodes for Memory Cells」という名称の、Zhengらによる米国特許出願第16/001,795号に対する優先権を主張するものであり、米国特許出願第16/001,795号は本発明の譲受人に譲渡され、参照によりその全体が本明細書に組み込まれる。
本特許出願は、2018年6月6日に出願された「Fabrication of Electrodes for Memory Cells」という名称の、Zhengらによる米国特許出願第16/001,795号に対する優先権を主張する、2019年5月20日に出願された「Fabrication of Electrodes for Memory Cells」という名称の、ZhengらによるPCT出願番号第PCT/US2019/033062号に対する優先権を主張するものであり、その米国特許出願およびPCT出願の各々は本発明の譲受人に譲渡され、且つその米国特許出願およびPCT出願の各々は参照によりその全体が本明細書に明確に組み込まれる。
Claims (25)
- メモリセルのための第1のアクセスラインと、
前記メモリセルのための第1の電極であって、前記第1のアクセスラインの上方に配置され、酸化炭素を含む第1の電極と、
前記メモリセルのための能動素子であって、前記第1の電極と接触し、カルコゲナイドを含む能動素子と
を備える装置。 - 前記酸化炭素が、前記第1の電極に関連づけられた化学機械平坦化(CMP)プロセスに少なくとも部分的に基づいて酸化される、請求項1に記載の装置。
- 前記酸化炭素が、前記CMPプロセスに関連して真空シールを破ることに少なくとも部分的に基づいて酸化される、請求項2に記載の装置。
- 前記メモリセルのための前記能動素子が、前記メモリセルのための、選択コンポーネント、記憶コンポーネント、またはそれらの組み合わせを備える、請求項1に記載の装置。
- 前記メモリセルのための第2の電極と、
前記メモリセルのための第2の能動素子であって、前記第2の電極と接触し、カルコゲナイドを含む第2の能動素子と
をさらに備える、請求項1に記載の装置。 - 前記第1の電極が、前記能動素子と接触する第1の表面を備え、前記第1の表面が第1の粗さを有し、
前記第2の電極が、前記第2の能動素子と接触する第2の表面を備え、前記第2の表面が、前記第1の粗さよりも大きい第2の粗さを有する、
請求項5に記載の装置。 - 前記能動素子が第1のカルコゲナイド材料を含み、
前記第2の能動素子が第2のカルコゲナイド材料を含み、前記第2のカルコゲナイド材料が前記第1のカルコゲナイド材料と異なる、
請求項5に記載の装置。 - 前記能動素子と前記第2の能動素子が同じカルコゲナイド材料を含む、請求項5に記載の装置。
- 前記第2の電極が酸化炭素を含む、請求項5に記載の装置。
- 前記メモリセルのための第3の電極であって、前記第2の能動素子と接触する第3の電極と、
前記メモリセルのための第2のアクセスラインと
をさらに備える、請求項5に記載の装置。 - 前記第3の電極が酸化炭素を含む、請求項10に記載の装置。
- 前記第1の電極が2つの副層を備え、前記能動素子と接触する副層が炭素を含む、請求項1に記載の装置。
- アクセスラインのための金属層を形成することと、
前記金属層の上方に、メモリセルのための電極層を形成することであって、前記電極層の表面が初期表面粗さを有する、形成することと、
前記初期表面粗さを有することから、前記初期表面粗さよりも小さい後続表面粗さを有することに前記表面を変化させるために、前記電極層の前記表面を研磨することと、
前記研磨することの後で、前記電極層の前記表面と接触する活性層を形成することであって、前記活性層の厚さの均一性が前記後続表面粗さに少なくとも部分的に基づく、形成することと
を含む方法。 - 前記電極層の前記表面を研磨することが、
前記電極層の前記表面に化学機械平坦化(CMP)プロセスを適用すること
を含む、請求項13に記載の方法。 - 前記電極層を形成することが、堆積プロセスを介して電極材料を堆積させることを含み、
前記電極層の前記表面を研磨することが、前記堆積プロセスに関連づけられた真空シールを破ることを含む、
請求項13に記載の方法。 - 前記メモリセルのための第2の電極層を前記活性層の上方に形成することと、
第2の活性層を前記第2の電極層の上方に形成することと
をさらに含む、請求項13に記載の方法。 - 第2の初期表面粗さから、前記第2の初期表面粗さよりも小さい第2の後続表面粗さに前記第2の電極層の表面を変化させるために、前記第2の活性層を形成する前に、前記第2の電極層の前記表面を研磨すること
をさらに含む、請求項16に記載の方法。 - 前記第2の電極層を形成する前に前記活性層の表面を研磨すること、または
前記第2の活性層の表面を研磨すること
をさらに含む、請求項16に記載の方法。 - 前記メモリセルのための記憶コンポーネントが前記第2の活性層の少なくとも一部分を備える、請求項16に記載の方法。
- 前記活性層が第1のカルコゲナイド材料を含み、
前記第2の活性層が第2のカルコゲナイド材料を含み、前記第2のカルコゲナイド材料が前記第1のカルコゲナイド材料と異なり、
前記電極層および前記第2の電極層が各々、炭素を含む、
請求項16に記載の方法。 - 前記メモリセルのための第3の電極層を前記第2の活性層の上方に形成することと、
前記メモリセルのための第2のアクセスラインのための第2の金属層を形成することであって、前記第2の金属層が前記第3の電極層の上方にある、形成することと、
前記第2の金属層を形成する前に前記第3の電極層の表面を研磨することと
をさらに含む、請求項16に記載の方法。 - アクセスラインのための金属層を形成することと、
前記金属層の上方に、メモリセルのための炭素を含む第1の電極層を形成することと、
前記第1の電極層の上側表面に化学機械平坦化(CMP)プロセスを適用することによって、前記第1の電極層の前記上側表面の表面粗さを減少させることと、
前記CMPプロセスを適用した後、前記第1の電極層の前記上側表面と接触するカルコゲナイド層を形成することと。
前記カルコゲナイド層の上方に、前記メモリセルのための炭素を含む第2の電極層を形成することと
を含む方法。 - 前記第1の電極層を形成することが、堆積プロセスを介して電極材料を堆積させることを含み、
前記第1の電極層の前記上側表面に前記CMPプロセスを適用することが、前記堆積プロセスに関連づけられた真空シールを破ることを含む、
請求項22に記載の方法。 - 前記第2の電極層の上側表面に第2のCMPプロセスを適用することによって、前記第2の電極層の前記上側表面の表面粗さを減少させることと、
前記第2の電極層の前記上側表面と接触する第2のカルコゲナイド層を形成することであって、前記第2のカルコゲナイド層の厚さが、前記第2の電極層の前記上側表面の前記表面粗さを減少させることに少なくとも部分的に基づく、形成することと
をさらに含む、請求項22に記載の方法。 - 前記第2の電極層の前記上側表面と接触する第2のカルコゲナイド層を形成することであって、前記第2のカルコゲナイド層の厚さが、前記第2の電極層の前記上側表面の初期表面粗さに少なくとも部分的に基づく、形成すること
をさらに含む、請求項22に記載の方法。
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