JP5537657B2 - 配線構造の形成方法、半導体装置の製造方法、基板処理装置 - Google Patents
配線構造の形成方法、半導体装置の製造方法、基板処理装置 Download PDFInfo
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- JP5537657B2 JP5537657B2 JP2012521230A JP2012521230A JP5537657B2 JP 5537657 B2 JP5537657 B2 JP 5537657B2 JP 2012521230 A JP2012521230 A JP 2012521230A JP 2012521230 A JP2012521230 A JP 2012521230A JP 5537657 B2 JP5537657 B2 JP 5537657B2
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- 238000012545 processing Methods 0.000 title claims description 43
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- 239000007789 gas Substances 0.000 claims description 55
- 229910052751 metal Inorganic materials 0.000 claims description 52
- 239000002184 metal Substances 0.000 claims description 49
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 42
- 239000001301 oxygen Substances 0.000 claims description 42
- 229910052760 oxygen Inorganic materials 0.000 claims description 42
- 238000004140 cleaning Methods 0.000 claims description 36
- 238000005530 etching Methods 0.000 claims description 28
- 229910052731 fluorine Inorganic materials 0.000 claims description 24
- 239000011737 fluorine Substances 0.000 claims description 24
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- 239000012298 atmosphere Substances 0.000 claims description 13
- 238000005498 polishing Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000001312 dry etching Methods 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 4
- 238000000151 deposition Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 2
- 239000011229 interlayer Substances 0.000 description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 57
- 230000008569 process Effects 0.000 description 44
- 239000010949 copper Substances 0.000 description 43
- 238000009792 diffusion process Methods 0.000 description 39
- 239000010410 layer Substances 0.000 description 22
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 19
- 239000010936 titanium Substances 0.000 description 12
- 229920002120 photoresistant polymer Polymers 0.000 description 11
- 239000012071 phase Substances 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 230000003647 oxidation Effects 0.000 description 9
- 238000007254 oxidation reaction Methods 0.000 description 9
- 229910052710 silicon Inorganic materials 0.000 description 9
- 229910052721 tungsten Inorganic materials 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 8
- 238000010926 purge Methods 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 7
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 229910001873 dinitrogen Inorganic materials 0.000 description 7
- 238000001020 plasma etching Methods 0.000 description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 7
- 239000010937 tungsten Substances 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000000026 X-ray photoelectron spectrum Methods 0.000 description 6
- 238000009832 plasma treatment Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 239000001307 helium Substances 0.000 description 5
- 229910052734 helium Inorganic materials 0.000 description 5
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 5
- 239000003870 refractory metal Substances 0.000 description 5
- 229910052715 tantalum Inorganic materials 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 125000004429 atom Chemical group 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 150000004767 nitrides Chemical class 0.000 description 4
- 238000000206 photolithography Methods 0.000 description 4
- 238000004528 spin coating Methods 0.000 description 4
- 238000004544 sputter deposition Methods 0.000 description 4
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 4
- -1 CH 2 F 2 Chemical compound 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 125000001153 fluoro group Chemical group F* 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910052707 ruthenium Inorganic materials 0.000 description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 229910008284 Si—F Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
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- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
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- 229910052735 hafnium Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000014653 Carica parviflora Nutrition 0.000 description 1
- 241000243321 Cnidaria Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 229910008051 Si-OH Inorganic materials 0.000 description 1
- 229910006358 Si—OH Inorganic materials 0.000 description 1
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- 239000005441 aurora Substances 0.000 description 1
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- 230000008859 change Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
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- 239000000470 constituent Substances 0.000 description 1
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- 229910052802 copper Inorganic materials 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
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- 238000004377 microelectronic Methods 0.000 description 1
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- 125000005375 organosiloxane group Chemical group 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
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- 230000000630 rising effect Effects 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
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- H01L21/02057—Cleaning during device manufacture
- H01L21/0206—Cleaning during device manufacture during, before or after processing of insulating layers
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- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
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- H01L21/76822—Modification of the material of dielectric layers, e.g. grading, after-treatment to improve the stability of the layers, to increase their density etc.
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- H01L23/53204—Conductive materials
- H01L23/53209—Conductive materials based on metals, e.g. alloys, metal silicides
- H01L23/53228—Conductive materials based on metals, e.g. alloys, metal silicides the principal metal being copper
- H01L23/53238—Additional layers associated with copper layers, e.g. adhesion, barrier, cladding layers
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Description
以下、第1の実施形態による半導体装置の製造方法を、図1A〜図1Sを参照しながら説明する。
≡SiF+H2O→≡Si−OH+HF (式1)
を生じ、また生成したHFが触媒となって、直後に形成されるバリアメタル膜を酸化させてしまう恐れがある。ここで記号「≡Si」は、Si原子が層間絶縁膜中の酸素など、他の原子に結合していることを示している。なおこのような開口部46の側壁面や底面に残留する水は、層間絶縁膜38中に吸着されていた水分や水素などに起因するものである。
(第2の実施形態)
先の実施形態では、図1Sの洗浄工程において、雰囲気中の酸素濃度を0.4体積%に設定して行っていた。
12 素子分離領域
14 素子領域
16 ゲート絶縁膜
18 ゲート電極
20 ゲート側壁絶縁膜
24 トランジスタ
26,38,54,58 層間絶縁膜
28 研磨ストッパ膜
30 コンタクトホール
32 密着層
34 タングステンプラグ
36,40,52,56,60,78 絶縁性拡散バリア膜
42、62,68 レジスト膜
44,64 レジスト開口部
46 開口部
48,74 バリアメタル膜
50,76 Cu層
50A,76a Cu配線パタ―ン
66 ビアホール
72 配線溝
76b Cuビアコンタクト
100 基板処理装置
111 処理容器
111A 基板保持台
111H 加熱機構
111I 真空ゲージ
111O 酸素濃度計
111S プロセス空間
112A ターボ分子ポンプ
112B ロータリポンプ
112C バルブ
113N 窒素ガス源
113He ヘリウムガス源
113Ar アルゴンガス源
113H 水素ガス源
114N,114He,114Ar,114H MFC
115N,115He,115Ar,115H ガス供給ライン
116A 過熱水蒸気発生装置
116B 給水ポンプ
116C 水タンク
116H 電気炉
116h ヒータ
116Q 配管
Claims (9)
- 絶縁膜中に開口部を、フッ素を含むエッチングガスを使ったドライエッチングにより形成する工程と、
前記開口部の底面と側壁面を、酸素を含んだ、酸素濃度0.6体積%以下の雰囲気中で、過熱水蒸気に曝露して洗浄する洗浄工程と、
前記開口部の底面と側壁面をバリアメタル膜で覆う工程と、
前記絶縁膜上に導体膜を堆積し、前記開口部を、前記バリアメタル膜を介して前記導体膜で充填する工程と、
前記導体膜およびその下のバリアメタル膜を、前記絶縁膜の表面が露出するまで化学機械研磨法により研磨し、前記開口部に前記導体膜により、配線パタ―ンを形成する工程と、
を含むことを特徴とする配線構造の形成方法。 - 前記洗浄工程は、常圧、あるいはそれ以下の圧力で実行されることを特徴とする請求項1記載の配線構造の形成方法。
- 前記洗浄工程は、前記開口部の底面と側壁面を、100℃〜400℃の温度の過熱水蒸気で曝露することにより実行されることを特徴とする請求項1記載の配線構造の形成方法。
- 前記雰囲気は、不活性雰囲気あるいは還元性雰囲気であることを特徴とする請求項1記載の配線構造の形成方法。
- 前記開口部の形成工程の後、前記洗浄工程の前に、前記雰囲気中の酸素濃度を0.6体積%以下に低減する低減工程を含むことを特徴とする請求項1記載の配線構造の形成方法。
- 前記開口部を形成する工程は、前記開口部が前記絶縁膜の下のCu膜を露出するように実行されることを特徴とする請求項1記載の配線構造の形成方法。
- 前記絶縁膜はSiを含むことを特徴とする請求項1記載の配線構造の形成方法。
- 絶縁膜中に開口部を、フッ素を含むエッチングガスを使ったドライエッチングにより形成する工程と、
前記開口部の底面と側壁面を、酸素を含んだ、酸素濃度0.6体積%以下の雰囲気中で、過熱水蒸気に曝露して洗浄する洗浄工程と、
前記開口部の底面と側壁面をバリアメタル膜で覆う工程と、
前記絶縁膜上に導体膜を堆積し、前記開口部を、前記バリアメタル膜を介して前記導体膜で充填する工程と、
前記導体膜およびその下のバリアメタル膜を、前記絶縁膜の表面が露出するまで化学機械研磨法により研磨し、前記開口部に前記導体膜により、配線パタ―ンを形成することを特徴とする半導体装置の製造方法。 - 排気系により排気し、被処理基板を保持する基板保持台を収容した処理容器と、
前記処理容器に不活性ガスまたは還元性ガスを供給するガス供給装置と、
前記処理容器中の酸素濃度を測定する酸素濃度測定装置と、
前記酸素濃度測定装置により測定された前記処理容器に含まれる酸素の酸素濃度が0.6体積%以下になると、前記処理容器に過熱水蒸気を供給する過熱水蒸気発生装置と、
前記基板保持台中に設けられ、前記基板保持台上の被処理基板を、前記被処理基板が曝露される過熱水蒸気の温度まで加熱する加熱機構と、
を備え、
前記過熱水蒸気発生装置は前記過熱水蒸気を、前記基板保持台上の被処理基板の温度よりも高い温度で前記処理容器中に供給することを特徴とする基板処理装置。
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JP6206096B2 (ja) * | 2013-10-31 | 2017-10-04 | 富士通株式会社 | 半導体装置の製造方法 |
US9219033B2 (en) | 2014-03-21 | 2015-12-22 | Taiwan Semiconductor Manufacturing Co., Ltd. | Via pre-fill on back-end-of-the-line interconnect layer |
US9466488B2 (en) * | 2014-05-09 | 2016-10-11 | Taiwan Semiconductor Manufacturing Company, Ltd. | Metal-semiconductor contact structure with doped interlayer |
US9799603B2 (en) * | 2016-01-27 | 2017-10-24 | Taiwan Semiconductor Manufacturing Co., Ltd. | Semiconductor device structure and method for forming the same |
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