JP2023509272A - 基板上に薄膜トランジスタの層を堆積する方法及びスパッタ堆積装置 - Google Patents
基板上に薄膜トランジスタの層を堆積する方法及びスパッタ堆積装置 Download PDFInfo
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- 239000000758 substrate Substances 0.000 title claims abstract description 111
- 238000004544 sputter deposition Methods 0.000 title claims abstract description 73
- 238000000151 deposition Methods 0.000 title claims abstract description 66
- 239000010409 thin film Substances 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 61
- 239000000463 material Substances 0.000 claims abstract description 98
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 78
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 78
- 239000013077 target material Substances 0.000 claims description 67
- 230000008021 deposition Effects 0.000 claims description 33
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 11
- 229910052733 gallium Inorganic materials 0.000 claims description 11
- 229910052738 indium Inorganic materials 0.000 claims description 11
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 11
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 239000011701 zinc Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 3
- 229910001887 tin oxide Inorganic materials 0.000 claims description 3
- 230000037230 mobility Effects 0.000 description 39
- 239000011248 coating agent Substances 0.000 description 14
- 238000000576 coating method Methods 0.000 description 14
- JAONJTDQXUSBGG-UHFFFAOYSA-N dialuminum;dizinc;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Al+3].[Zn+2].[Zn+2] JAONJTDQXUSBGG-UHFFFAOYSA-N 0.000 description 13
- 230000003647 oxidation Effects 0.000 description 12
- 238000007254 oxidation reaction Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 239000004065 semiconductor Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000035882 stress Effects 0.000 description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000969 carrier Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000001755 magnetron sputter deposition Methods 0.000 description 3
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000002800 charge carrier Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000005137 deposition process Methods 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000003574 free electron Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- RHZWSUVWRRXEJF-UHFFFAOYSA-N indium tin Chemical compound [In].[Sn] RHZWSUVWRRXEJF-UHFFFAOYSA-N 0.000 description 1
- HRHKULZDDYWVBE-UHFFFAOYSA-N indium;oxozinc;tin Chemical compound [In].[Sn].[Zn]=O HRHKULZDDYWVBE-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- KYKLWYKWCAYAJY-UHFFFAOYSA-N oxotin;zinc Chemical compound [Zn].[Sn]=O KYKLWYKWCAYAJY-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 238000001552 radio frequency sputter deposition Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
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Abstract
Description
Claims (15)
- 少なくとも1つの第1の電極対及び少なくとも1つの第2の電極対を含むスパッタ堆積源を使用して基板上に薄膜トランジスタの層を堆積する方法(480,580)であって、
前記基板を第1の真空チャンバへと移動させること(482,582);
前記少なくとも1つの第1の電極対に双極性パルスDC電圧を供給することによって前記基板上に前記層のうちの第1の層を堆積させることであって、前記第1の層の第1の材料が第1の金属酸化物を含む、第1の層を堆積させること(484,584);
真空破壊することなく、前記基板を前記第1の真空チャンバから第2の真空チャンバへと移動させること(486,586);並びに
前記少なくとも1つの第2の電極対に双極性パルスDC電圧を供給することによって前記第1の層上に前記層のうちの第2の層を堆積させることであって、前記第2の層の第2の材料が第2の金属酸化物を含み、前記第2の材料が前記第1の材料とは異なっている、第2の層を堆積させること(488,588)
を含む、方法。 - 前記第1の層が、前記薄膜トランジスタのチャネル、特に前記薄膜トランジスタのフロントチャネルを形成する、請求項1に記載の方法。
- 前記第2の層が前記薄膜トランジスタのバックチャネルを形成する、請求項1又は2に記載の方法。
- 前記第1の金属酸化物及び前記第2の金属酸化物の一方が、前記第1の金属酸化物及び前記第2の金属酸化物の他方に対して異なる金属を含む、請求項1から3のいずれか一項に記載の方法。
- 前記第1の金属酸化物が、元素を第1の化学量論で含み、前記第2の金属酸化物が、前記元素を第2の化学量論で含み、前記第2の化学量論が前記第1の化学量論とは異なっている、請求項1から4のいずれか一項に記載の方法。
- 前記元素が、インジウム、ガリウム、及び亜鉛からなる群より選択される少なくとも2つを含む、請求項5に記載の方法。
- 前記第1の材料が、前記第2の材料に対して異なるキャリア移動度を有する、請求項1から6のいずれか一項に記載の方法。
- 前記第1の材料が、前記第2の材料に対して異なるキャリア濃度を有する、請求項1から7のいずれか一項に記載の方法。
- 前記第1の材料及び前記第2の材料の一方が、さらなる金属酸化物をさらに含むか、あるいは、前記第1の材料及び前記第2の材料が、異なる内容のさらなる金属酸化物を含み、前記さらなる金属酸化物が、酸化スズ、酸化アルミニウム、及び透明な導電性酸化物(特に、ITO、IZO、又はAZO)のうちの少なくとも1つを含む、請求項1から8のいずれか一項に記載の方法。
- 前記第1の金属酸化物及び前記第2の金属酸化物の少なくとも一方が、IGZO、IZTO、IGZTO、IZO、ITO、又はAZOである、請求項1から9のいずれか一項に記載の方法。
- 前記基板が、前記第1の層の堆積中及び前記第2の層の堆積中に連続的に移動する、請求項1から10のいずれか一項に記載の方法。
- 前記第1の層が、ゲート絶縁層上に堆積される、請求項1から11のいずれか一項に記載の方法。
- 前記方法が、
真空破壊することなく、前記基板を前記第2の真空チャンバから第3の真空チャンバへと移動させること(590);及び
特に少なくとも1つの第3の電極対を使用して、前記第2の層上に前記層のうちの第3の層を堆積させること(592)
をさらに含む、請求項1から12のいずれか一項に記載の方法。 - スパッタ堆積装置(100)、特に、基板(110)上に薄膜トランジスタの層を堆積するためのスパッタ堆積装置であって、
真空破壊することなく、前記基板が前記第1の真空チャンバ(130)と前記第2の真空チャンバ(140)との間で移送可能になるように配置されている、第1の真空チャンバ(130)及び第2の真空チャンバ(140);並びに
スパッタ堆積源であって、
少なくとも1つの第1の電極対(132)及び少なくとも1つの第2の電極対(142)であって、前記少なくとも1つの第1の電極対(132)が前記第1の真空チャンバ(130)内に配置され、前記少なくとも1つの第2の電極対(142)が前記第2の真空チャンバ(140)内に配置される、少なくとも1つの第1の電極対(132)及び少なくとも1つの第2の電極対(142);並びに
前記少なくとも1つの第1の電極対(132)及び前記少なくとも1つの第2の電極対(142)に双極性パルスDC電圧を供給するように構成された電源配置(120);
を含む、スパッタ堆積源
を含み、
前記少なくとも1つの第1の電極対(132)が第1のターゲット材料を有する第1のターゲット(134)を含み、前記第1のターゲット材料が第1の金属酸化物を含み;かつ
前記少なくとも1つの第2の電極対(142)が第2のターゲット材料を有する第2のターゲット(144)を含み、前記第2のターゲット材料が第2の金属酸化物を含み、かつ前記第2のターゲット材料が前記第1のターゲット材料とは異なっている、
スパッタ堆積源
を含む、スパッタ堆積装置(100)。 - 前記第1のターゲット(134)及び前記第2のターゲット(144)が回転式ターゲットである、請求項14に記載のスパッタ堆積装置(100)。
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