JP5100057B2 - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- JP5100057B2 JP5100057B2 JP2006223530A JP2006223530A JP5100057B2 JP 5100057 B2 JP5100057 B2 JP 5100057B2 JP 2006223530 A JP2006223530 A JP 2006223530A JP 2006223530 A JP2006223530 A JP 2006223530A JP 5100057 B2 JP5100057 B2 JP 5100057B2
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- 239000004065 semiconductor Substances 0.000 title claims description 55
- 238000004519 manufacturing process Methods 0.000 title claims description 50
- 238000000034 method Methods 0.000 claims description 116
- 238000005530 etching Methods 0.000 claims description 106
- 238000004380 ashing Methods 0.000 claims description 93
- 230000008569 process Effects 0.000 claims description 77
- 238000006884 silylation reaction Methods 0.000 claims description 65
- 238000011084 recovery Methods 0.000 claims description 55
- 238000004140 cleaning Methods 0.000 claims description 40
- 239000007788 liquid Substances 0.000 claims description 19
- 229940070337 ammonium silicofluoride Drugs 0.000 claims description 14
- 238000009832 plasma treatment Methods 0.000 claims description 14
- KZFNONVXCZVHRD-UHFFFAOYSA-N dimethylamino(dimethyl)silicon Chemical compound CN(C)[Si](C)C KZFNONVXCZVHRD-UHFFFAOYSA-N 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 10
- 239000012298 atmosphere Substances 0.000 claims description 9
- KAHVZNKZQFSBFW-UHFFFAOYSA-N n-methyl-n-trimethylsilylmethanamine Chemical compound CN(C)[Si](C)(C)C KAHVZNKZQFSBFW-UHFFFAOYSA-N 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 9
- GJWAPAVRQYYSTK-UHFFFAOYSA-N [(dimethyl-$l^{3}-silanyl)amino]-dimethylsilicon Chemical group C[Si](C)N[Si](C)C GJWAPAVRQYYSTK-UHFFFAOYSA-N 0.000 claims description 7
- XCOBLONWWXQEBS-KPKJPENVSA-N N,O-bis(trimethylsilyl)trifluoroacetamide Chemical compound C[Si](C)(C)O\C(C(F)(F)F)=N\[Si](C)(C)C XCOBLONWWXQEBS-KPKJPENVSA-N 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- QULMGWCCKILBTO-UHFFFAOYSA-N n-[dimethylamino(dimethyl)silyl]-n-methylmethanamine Chemical compound CN(C)[Si](C)(C)N(C)C QULMGWCCKILBTO-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- NRKYWOKHZRQRJR-UHFFFAOYSA-N 2,2,2-trifluoroacetamide Chemical compound NC(=O)C(F)(F)F NRKYWOKHZRQRJR-UHFFFAOYSA-N 0.000 claims 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 claims 1
- 239000007789 gas Substances 0.000 description 159
- 235000012431 wafers Nutrition 0.000 description 120
- 239000003795 chemical substances by application Substances 0.000 description 25
- 239000010949 copper Substances 0.000 description 18
- 239000011229 interlayer Substances 0.000 description 13
- 238000011068 loading method Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- 239000011248 coating agent Substances 0.000 description 11
- 238000000576 coating method Methods 0.000 description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 9
- 230000009977 dual effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000009713 electroplating Methods 0.000 description 7
- 239000010410 layer Substances 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 7
- 239000012159 carrier gas Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 5
- 238000004544 sputter deposition Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 4
- 230000001737 promoting effect Effects 0.000 description 4
- 239000006200 vaporizer Substances 0.000 description 4
- 125000000217 alkyl group Chemical group 0.000 description 3
- 238000001020 plasma etching Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 244000132059 Carica parviflora Species 0.000 description 1
- 235000014653 Carica parviflora Nutrition 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000005441 aurora Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920003209 poly(hydridosilsesquioxane) Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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Description
まず、エッチングユニット151について説明する。
このエッチングユニット151は、層間絶縁膜として形成されたSi含有低誘電率膜(以下、Si含有Low−k膜と記す)に対しプラズマエッチングを行うものであり、図3に示すように、略円筒状に形成された処理チャンバ211を具備し、その内部の底部には、絶縁板213を介して、サセプタ支持台214が配置され、その上に、サセプタ215が配置されている。サセプタ215は下部電極を兼ねたものであり、その上面に静電チャック220を介してウエハWが載置されるようになっている。符号216はハイパスフィルタ(HPF)である。
チャンバ内圧力:10Pa(75mTorr)
上部高周波電力(60MHz):1500W
下部高周波電力(2MHz):100W
エッチングガス:
CF4ガス=80mL/min(sccm)
Arガス=160mL/min(sccm)
エッチング時間:10sec
・O2アッシング
チャンバ内圧力:1.3Pa(10mTorr)
上部高周波電力(60MHz):300W
下部高周波電力(2MHz):300W
アッシングガス:
O2ガス=300mL/min(sccm)
アッシング時間:26sec
・NH3アッシング
チャンバ内圧力:40Pa(300mTorr)
上部高周波電力(60MHz):0W
下部高周波電力(2MHz):300W
アッシングガス:
NH3ガス=700mL/min(sccm)
アッシング時間:100sec
・ベーク処理
チャンバ内圧力:1333Pa(10Torr)
雰囲気ガス:
Arガス=2000mL/min(sccm)
ウエハ載置台温度:200℃
処理時間:150sec
・H2プラズマ処理:
チャンバ内圧力:13.3Pa(100mTorr)
上部高周波電力(60MHz):300W
下部高周波電力(2MHz):0W(バイアスなし)
プラズマガス:
H2ガス=400mL/min(sccm)
処理時間:15sec
・Arプラズマ処理
チャンバ内圧力:13.3Pa(100mTorr)
上部高周波電力(60MHz):300W
下部高周波電力(2MHz):300W(バイアスあり)
プラズマガス:
Arガス=400mL/min(sccm)
処理時間:15sec
・シリル化処理
シリル化剤:TMSDMA
チャンバ内圧力:6650Pa(50Torr)
ウエハ載置台温度:150℃
処理時間:15sec
101;SOD装置
102;レジスト塗布/現像装置
103;露光装置
104;エッチング・アッシング・生成物除去・回復処理システム
105;洗浄処理装置
106;スパッタ装置
107;電解メッキ装置
108;CMP装置
110;メイン制御部
111;プロセスコントローラ
112;ユーザーインターフェース
113;記憶部
120;絶縁膜
122;下部配線
123;ストッパ膜
124;Si含有Low−k膜
125a;反射防止膜
125b;レジスト膜
128a:ビア
128b;トレンチ
129a,129b;ダメージ部
130a,130b;生成物
131;保護膜
151;エッチングユニット
152;アッシングユニット
153;生成物除去ユニット
154;シリル化処理ユニット
153a;ベーク処理ユニット
153b;洗浄処理ユニット
W;ウエハ(基板)
Claims (14)
- 半導体基板に形成された被エッチング膜としてのSi含有低誘電率膜に所定の回路パターンを有するエッチングマスクを形成する工程と、
前記エッチングマスクを介して前記Si含有低誘電率膜をF含有ガスによりエッチングすることにより、前記Si含有低誘電率膜に溝または孔を形成する工程と、
前記エッチングの後、アッシングにより前記エッチングマスクを除去する工程と、
前記エッチングマスクを除去する工程までの工程によりSi含有低誘電率膜に入ったダメージを所定の回復ガスを供給することにより回復させる回復工程とを有し、
前記エッチング工程から前記エッチングマスクを除去する工程が終了するまでの間に前記Si含有低誘電率膜の被エッチング部分がNH3ガスに曝される半導体装置の製造方法であって、
前記回復工程に先立って、前記NH3ガスに曝されることによって前記Si含有低誘電率膜の前記F含有ガスのFが残留した被エッチング部分に形成された珪フッ化アンモニウム系化合物からなる生成物を除去する工程をさらに有することを特徴とする半導体装置の製造方法。 - 前記エッチングマスクを除去する工程は、NH3ガスを含むガスによるアッシングによって行われ、これにより前記Si含有低誘電率膜の被エッチング部分がNH3ガスに曝されることを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記生成物を除去する工程は、プラズマ処理により行われることを特徴とする請求項1または請求項2に記載の半導体装置の製造方法。
- 前記プラズマ処理は、真空中でArガスまたはH2ガスまたはHeガスをプラズマ化することにより実施されることを特徴とする請求項3に記載の半導体装置の製造方法。
- 前記生成物を除去する工程と、前記エッチングマスクを除去する工程とは、同一の処理室内で行われることを特徴とする請求項3または請求項4に記載の半導体装置の製造方法。
- 前記生成物を除去する工程と、前記エッチングマスクを除去する工程と、前記回復工程とは、同一の処理室内で行われることを特徴とする請求項3または請求項4に記載の半導体装置の製造方法。
- 前記生成物を除去する工程は、熱処理によって行われることを特徴とする請求項1または請求項2に記載の半導体装置の製造方法。
- 前記熱処理は、150〜350℃の範囲で行われることを特徴とする請求項7に記載の半導体装置の製造方法。
- 前記エッチング工程と、前記エッチングマスクを除去する工程と、前記生成物を除去する工程と、前記回復工程とは、真空雰囲気で各工程を行う複数の処理室と、真空を破らずに各処理室間で半導体基板を搬送する搬送機構とを有するクラスター化された処理システムにより行われることを特徴とする請求項1から請求項8のいずれか1項に記載の半導体装置の製造方法。
- 前記生成物を除去する工程は、洗浄液による洗浄によって行われることを特徴とする請求項1または請求項2に記載の半導体装置の製造方法。
- 前記回復工程は、回復ガスとしてシリル化ガスを用いたシリル化処理により行われることを特徴とする請求項1から請求項10のいずれか1項に記載の半導体装置の製造方法。
- 前記シリル化処理は、回復ガスとして、分子内にシラザン結合(Si−N)を有する化合物を用いて行なうことを特徴とする請求項11に記載の半導体装置の製造方法。
- 前記分子内にシラザン結合を有する化合物が、TMDS(1,1,3,3-Tetramethyldisilazane)、TMSDMA(Dimethylaminotrimethylsilane)、DMSDMA(Dimethylsilyldimethylamine)、TMSPyrole(1-Trimethylsilylpyrole)、BSTFA(N,O-Bis(trimethylsilyl)trifluoroacetamide)、BDMADMS(Bis(dimethylamino)dimethylsilane)であることを特徴とする請求項12に記載の半導体装置の製造方法。
- コンピュータ上で動作する制御プログラムが記憶されたコンピュータ読取可能な記憶媒体であって、
前記制御プログラムは、実行時に、請求項1から請求項13のいずれか1項に記載の製造方法が行われるように、コンピュータに製造システムを制御させることを特徴とするコンピュータ読取可能な記憶媒体。
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JP5261291B2 (ja) * | 2009-06-01 | 2013-08-14 | 東京エレクトロン株式会社 | 処理方法および記憶媒体 |
JP5544893B2 (ja) * | 2010-01-20 | 2014-07-09 | 東京エレクトロン株式会社 | 基板処理方法及び記憶媒体 |
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