JP2022505844A - ライナーレス連続アモルファス金属膜 - Google Patents
ライナーレス連続アモルファス金属膜 Download PDFInfo
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- JP2022505844A JP2022505844A JP2021522522A JP2021522522A JP2022505844A JP 2022505844 A JP2022505844 A JP 2022505844A JP 2021522522 A JP2021522522 A JP 2021522522A JP 2021522522 A JP2021522522 A JP 2021522522A JP 2022505844 A JP2022505844 A JP 2022505844A
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- Prior art keywords
- metal
- amorphous silicon
- thin film
- layer
- silicon layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000005300 metallic glass Substances 0.000 title 1
- 229910052751 metal Inorganic materials 0.000 claims abstract description 117
- 239000002184 metal Substances 0.000 claims abstract description 117
- 238000000034 method Methods 0.000 claims abstract description 71
- 229910021417 amorphous silicon Inorganic materials 0.000 claims abstract description 66
- 239000010409 thin film Substances 0.000 claims abstract description 54
- 238000011282 treatment Methods 0.000 claims abstract description 23
- 239000000758 substrate Substances 0.000 claims description 42
- 239000002243 precursor Substances 0.000 claims description 22
- 230000008569 process Effects 0.000 claims description 21
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 14
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 12
- 229910052721 tungsten Inorganic materials 0.000 claims description 12
- 239000010937 tungsten Substances 0.000 claims description 12
- 238000000151 deposition Methods 0.000 abstract description 16
- 238000010586 diagram Methods 0.000 abstract description 12
- 238000006243 chemical reaction Methods 0.000 abstract description 9
- 230000006911 nucleation Effects 0.000 abstract 1
- 238000010899 nucleation Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 103
- 239000010408 film Substances 0.000 description 41
- 239000012528 membrane Substances 0.000 description 19
- 230000004888 barrier function Effects 0.000 description 11
- 238000012545 processing Methods 0.000 description 11
- 238000005229 chemical vapour deposition Methods 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
- 239000010703 silicon Substances 0.000 description 7
- 238000000231 atomic layer deposition Methods 0.000 description 6
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 5
- 230000008021 deposition Effects 0.000 description 5
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000001678 elastic recoil detection analysis Methods 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000005001 rutherford backscattering spectroscopy Methods 0.000 description 2
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000003877 atomic layer epitaxy Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004886 process control Methods 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
- 239000002210 silicon-based material Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- NXHILIPIEUBEPD-UHFFFAOYSA-H tungsten hexafluoride Chemical compound F[W](F)(F)(F)(F)F NXHILIPIEUBEPD-UHFFFAOYSA-H 0.000 description 1
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- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76871—Layers specifically deposited to enhance or enable the nucleation of further layers, i.e. seed layers
- H01L21/76876—Layers specifically deposited to enhance or enable the nucleation of further layers, i.e. seed layers for deposition from the gas phase, e.g. CVD
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Abstract
Description
[0002] 回路の集積化が高まると、層の厚さに関する均一性とプロセス制御を高める必要性が増す。その結果、層の特性に対する制御を維持しつつ、コスト効率のよい方法で基板上に層を堆積するための様々な技術が開発されてきた。化学気相堆積(CVD)は、基板上での層の堆積に用いられる最も一般的な堆積処理の一つである。CVDは、均一な厚さの所望の層を生成するために、基板温度および処理チャンバに導入される前駆体の正確な制御を必要とするフラックス依存の堆積技術である。これらの要件は、基板サイズが増大するにつれて、より重要になり、十分な均一性を維持するためには、チャンバ設計およびガス流技術をより複雑なものにする必要性が生じる。
[0032] 2WF6 + 3Si → 2W + 3SiF4
Claims (15)
- 基板の表面上に形成された特徴を充填する方法であって、
前記基板の前記表面上に形成された前記特徴の上に連続金属層を形成することであって、前記連続金属層を形成する処理は、
(a)アモルファスシリコン層を前記特徴の露出した表面上に形成することと、
(b)形成された前記アモルファスシリコン層を金属薄膜に変換することであって、前記アモルファスシリコン層を変換する処理は、前記アモルファスシリコン層中の実質的にすべてのシリコン原子が金属含有前駆体中に見出される1つまたは複数の金属原子によって置換されるまで、前記アモルファスシリコン層を前記金属含有前駆体に曝露することを含む、形成された前記アモルファスシリコン層を金属薄膜に変換することと、
(c)(a)および(b)を、少なくとも2回、かつ前記金属原子を含む連続薄膜が前記特徴の前記表面上に形成されるまで、反復することと、
を含む、連続金属層を形成すること、および、
形成された前記連続薄膜上にバルク金属層を形成すること、
を含む、基板の表面上に形成された特徴を充填する方法。 - 前記処理が、約5Torrから約20Torrの間の圧力で実施される、請求項6に記載の方法。
- 処理中に前記基板の温度が、約250℃から約500℃の間の温度で維持される、請求項1に記載の方法。
- 前記処理は、約50Wから約500Wの間のRF電力範囲で行われる、請求項1に記載の方法。
- 基板の表面上に薄膜を形成するための方法であって、
前記基板の前記表面上に形成された特徴の上に連続金属層を形成することであって、前記連続金属層を形成する処理は、
(a)アモルファスシリコン層を前記特徴の露出した表面上に形成することと、
(b)形成された前記アモルファスシリコン層を金属薄膜に変換することであって、前記アモルファスシリコン層を変換する処理は、前記アモルファスシリコン層中の実質的にすべてのシリコン原子が金属含有前駆体中に見出される1つまたは複数の金属原子によって置換されるまで、前記アモルファスシリコン層を前記金属含有前駆体に曝露することを含む、形成された前記アモルファスシリコン層を金属薄膜に変換することと、
(c)(a)および(b)を、少なくとも2回、かつ前記金属原子を含む連続薄膜が前記特徴の前記表面上に形成され、前記薄膜が約10オングストロームから約100オングストロームの間になるまで、反復することと、
を含む、連続金属層を形成すること、および、
形成された前記連続薄膜上にバルク金属層を形成することによって、前記基板の前記表面上に形成された前記特徴を充填すること、
を含む、基板の表面上に薄膜を形成するための方法。 - 前記処理は、約5Torrから約20Torrの間の圧力で実施される、請求項5に記載の方法。
- 前記処理は、約50Wから約500Wの間のRF電力範囲で行われる、請求項5に記載の方法。
- 前記処理中に前記基板の温度が、約250℃から約500℃の間の温度で維持される、請求項5に記載の方法。
- 前記バルク金属は約20μΩ・cm以下の抵抗率を有する、請求項5に記載の方法。
- 薄膜を形成するための方法であって、
基板の表面上に形成された特徴の上に連続金属層を形成することであって、前記連続金属層を形成する処理は、
(a)約10オングストロームから約40オングストロームの間であるアモルファスシリコン層を前記特徴の露出した表面上に形成することと、
(b)形成された前記アモルファスシリコン層を金属薄膜に変換することであって、前記アモルファスシリコン層を変換する前記処理は、前記アモルファスシリコン層中の実質的にすべてのシリコン原子が、金属含有前駆体中に見出される1つまたは複数の金属原子によって置換されるまで、前記アモルファスシリコン層を前記金属含有前駆体に曝露することを含む、形成された前記アモルファスシリコン層を金属薄膜に変換することと、
(c)(a)および(b)を、少なくとも2回、かつ前記金属原子を含む連続薄膜が前記特徴の前記表面上に形成され、前記薄膜が約10オングストロームから約100オングストロームの間の厚さを有するまで、反復することと、
を含む、連続金属層を形成すること、および、
形成された前記連続薄膜上にバルク金属層を形成することによって、前記基板の前記表面上に形成された前記特徴を充填すること、
を含む、薄膜を形成するための方法。 - 前記処理が、約5Torrから約20Torrの間の圧力で実施される、請求項10に記載の方法。
- 前記処理中に前記基板の温度が、約250℃から約500℃の間の温度で維持される、請求項10に記載の方法。
- 前記処理は、約50Wから約500Wの間のRF電力範囲で行われる、請求項10に記載の方法。
- 前記金属薄膜はタングステンから作られる、請求項10に記載の方法。
- 前記バルク金属は約20μΩ・cm以下の抵抗率を有する、請求項10に記載の方法。
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