JP5119618B2 - 半導体装置の製造方法、半導体装置の製造装置及び記憶媒体 - Google Patents
半導体装置の製造方法、半導体装置の製造装置及び記憶媒体 Download PDFInfo
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- JP5119618B2 JP5119618B2 JP2006197671A JP2006197671A JP5119618B2 JP 5119618 B2 JP5119618 B2 JP 5119618B2 JP 2006197671 A JP2006197671 A JP 2006197671A JP 2006197671 A JP2006197671 A JP 2006197671A JP 5119618 B2 JP5119618 B2 JP 5119618B2
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- 239000004065 semiconductor Substances 0.000 title claims description 37
- 238000004519 manufacturing process Methods 0.000 title claims description 33
- 238000003860 storage Methods 0.000 title description 8
- 239000010949 copper Substances 0.000 claims description 162
- 229910052802 copper Inorganic materials 0.000 claims description 139
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 138
- 229910052751 metal Inorganic materials 0.000 claims description 77
- 239000002184 metal Substances 0.000 claims description 77
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 62
- 239000007789 gas Substances 0.000 claims description 50
- 238000010438 heat treatment Methods 0.000 claims description 34
- 239000002994 raw material Substances 0.000 claims description 26
- 230000003647 oxidation Effects 0.000 claims description 23
- 238000007254 oxidation reaction Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 22
- 239000010936 titanium Substances 0.000 claims description 21
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 19
- 229910052719 titanium Inorganic materials 0.000 claims description 19
- 239000000956 alloy Substances 0.000 claims description 17
- 229910045601 alloy Inorganic materials 0.000 claims description 17
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 13
- 229910052715 tantalum Inorganic materials 0.000 claims description 8
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 8
- 238000000151 deposition Methods 0.000 claims description 7
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 150000002894 organic compounds Chemical class 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 120
- 230000004888 barrier function Effects 0.000 description 53
- 230000015572 biosynthetic process Effects 0.000 description 25
- 239000012535 impurity Substances 0.000 description 20
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 13
- 229910052707 ruthenium Inorganic materials 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000012159 carrier gas Substances 0.000 description 6
- 230000008021 deposition Effects 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- -1 copper organic compound Chemical class 0.000 description 4
- 230000003028 elevating effect Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000006200 vaporizer Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-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
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- IUYOGGFTLHZHEG-UHFFFAOYSA-N copper titanium Chemical compound [Ti].[Cu] IUYOGGFTLHZHEG-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- VMDTXBZDEOAFQF-UHFFFAOYSA-N formaldehyde;ruthenium Chemical compound [Ru].O=C VMDTXBZDEOAFQF-UHFFFAOYSA-N 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 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
- 239000004332 silver Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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Description
前記処理容器内に水蒸気を供給する水蒸気供給工程と、
前記水蒸気供給工程で供給された水蒸気が存在する処理容器内に、前記水蒸気供給工程の開始と同時にまたはその後、銅の有機化合物からなる原料ガスを供給して、水蒸気によって酸化物層が形成された前記下地膜の表面に銅膜を成膜する銅膜成膜工程と、
この銅膜が成膜された基板に水素雰囲気下で熱処理を施して、前記酸化物層を、前記下地膜を構成する金属と銅との合金層に変換する変換工程と、を含む
ことを特徴とする。ここで、酸化傾向の高い金属は、チタンまたはタンタルとするとよい。さらに、前記水蒸気供給工程と前記銅膜成膜工程は真空雰囲気下で行われ、前記水蒸気供給工程と前記銅膜成膜工程の間も真空雰囲気が保たれることが好ましい。
また、他の発明によれば酸化傾向の低い金属からなる下地膜の上に銅膜を成膜するため、水蒸気の存在下で成膜を行っても下地膜の表面における酸化物層の形成が抑制され、下地膜との密着性の高い銅膜を成膜することができる。
第1の実施の形態にて説明した半導体製造装置の製造方法に基づいて、酸化傾向の高いチタンをバリアメタル層として被覆したウエハW上に銅膜を成膜した。バリアメタル層と銅膜との界面をSEMで撮影した結果を図8(a)に示す。なお、成膜条件は以下の通りである。
(銅膜の成膜条件)
バリアメタル層:チタン
銅原料:Cu(hfac)TMVS
成膜温度(ウエハの温度):150℃
水蒸気導入:有り
水蒸気を導入しなかった点以外は、(実施例1)と同様の条件で銅膜14aを成膜した。SEMの撮影結果を図8(b)に示す。
図8(a)に示すように、水蒸気を導入して水分子の存在下で銅膜を成膜した(実施例1)では、有機不純物層の厚さが1.5nmとなっており、有機不純物層は殆ど形成されなかった。これに対して、水蒸気を導入しなかった(比較例1)では、図8(b)に示すように、有機不純物層の厚さが6nmと水蒸気を導入した場合の4倍にもなっている。このような厚い有機物層が形成されることにより、バリアメタル層と銅膜との密着性を悪化しているものと考えられる。
(実施例1)にて得られたウエハWに熱処理を施した。銅膜とその下地との界面をSEMで撮影した結果を図9(a)に示す。熱処理の条件は以下の通りある。
(熱処理の条件)
処理雰囲気:水素雰囲気
熱処理温度:450℃
加熱時間:30分
(実施例1)にて得られたウエハWに熱処理を施す前のウエハWについて、銅膜とその下地との界面をSEMで撮影した結果を図9(b)に示す。
図9(a)に示すように、熱処理を施した(実施例2)では、バリアメタル層(Ti)と、銅膜との界面に5nm程の膜が形成されていることが分かる。この膜を更に拡大すると、Cu3Tiの結晶構造が確認され、銅とチタンとからなる合金層が形成されていることが分かる。これに対して、熱処理を施す前の(比較例2)でもバリアメタル層と、銅膜との間に1.5〜2.5nm程度の膜の形成が確認された。この膜を更に拡大すると、(実施例2)のような結晶構造は見られず、アモルファス状態となっていた。これは、水分子の存在下で銅膜を成膜したことによって形成されたチタンの酸化物層であると考えられる。
第2の実施の形態にて説明した半導体装置の製造方法に基づいて、90nm、80nmの2種類のトレンチ100にバリアメタル層として酸化傾向の低いルテニウムを被覆し、その後銅膜を作成してトレンチ100内に銅を埋め込んだ。夫々の結果を図10に示す。なお、上記のバリアメタル層は、下層側にイオン化PVDにより窒化チタンを被覆した2層構造とした。また、成膜条件は以下の通りである。
(バリアメタル層の成膜条件)
下層側:窒化チタン(イオン化PVDにより被覆)
上層側:ルテニウム(Ru3(CO)12を原料とするCVDにより被覆、成膜温度150℃)
(銅膜の成膜条件)
銅原料:Cu(hfac)TMVS
成膜温度(ウエハの温度):150℃
水蒸気導入:有り
図10に示すように、銅とルテニウムとの間には酸化物層の形成は確認されなかった。また、80nm、90nmいずれのトレンチ100についてもボイドが形成されたりすることなく均一に銅を埋め込むことができた。
2、2a CVD装置
3 熱処理装置
7 半導体製造装置
10、11 SiOC膜
12 SiN膜
13 バリアメタル層
13a 酸化物層
13b 合金層
14 銅配線
14a 銅膜
15 バリアメタル層
20 処理容器(真空チャンバ)
20a 大径円筒部
20b 小径円筒部
21 ステージ
21a ヒータ
22 支持部材
23 昇降ピン
24 支持部材
25 昇降機構
26 排気管
27 真空ポンプ
28 ゲートバルブ
29 搬送口
31 開口部
32 ガスシャワーヘッド
35a 下部ガス室
35b 上部ガス室
37a 原料ガス供給孔
37b 水蒸気供給孔
41、61 原料ガス供給路
42、62 原料貯留部
43 加圧部
44 流量調整部
45 ベーパライザ
46 キャリアガス供給源
47 流量調整部
51 水蒸気供給路
52 水蒸気供給源
53 流量調整部
63 Ar供給源
64 流量調整部
65 ヒータ
68 三方弁
70 制御部
71、72 キャリア室
73 第1の搬送室
74、75 予備真空室
76 第2の搬送室
77 第1の搬送手段
78 第2の搬送手段
100 トレンチ
Claims (6)
- 気密な処理容器内に、酸化傾向の高い金属からなる下地膜が被覆された基板を載置する工程と、
前記処理容器内に水蒸気を供給する水蒸気供給工程と、
前記水蒸気供給工程で供給された水蒸気が存在する処理容器内に、前記水蒸気供給工程の開始と同時にまたはその後、銅の有機化合物からなる原料ガスを供給して、水蒸気によって酸化物層が形成された前記下地膜の表面に銅膜を成膜する銅膜成膜工程と、
この銅膜が成膜された基板に水素雰囲気下で熱処理を施して、前記酸化物層を、前記下地膜を構成する金属と銅との合金層に変換する変換工程と、を含む
ことを特徴とする半導体装置の製造方法。 - 前記酸化傾向の高い金属は、チタンまたはタンタルであ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。
- 前記水蒸気供給工程と前記銅膜成膜工程は真空雰囲気下で行われ、
前記水蒸気供給工程と前記銅膜成膜工程の間も真空雰囲気が保たれる
ことを特徴とする請求項1または2に記載の半導体装置の製造方法。 - 基板搬送手段が設けられた搬送室に第1の処理容器及び第2の処理容器が気密に接続された半導体製造装置において、
前記第1の処理容器を真空雰囲気に保つ手段と
前記第1の処理容器に水蒸気を供給する水蒸気供給手段と、
前記第1の処理容器に、銅の有機化合物からなる原料ガスを供給する原料ガス供給手段
と、
前記第2の処理容器に水素を供給する水素供給手段と、
前記第2の処理容器内で基板に熱処理を施すための加熱手段と、
酸化傾向の高い金属からなる下地膜が被覆された基板を前記第1の処理容器内に載置するステップと、
次に第1の処理容器内に水蒸気を供給する水蒸気供給ステップと、
前記水蒸気供給ステップで供給された水蒸気が存在する第1の処理容器内に、前記水蒸気供給ステップの開始と同時にまたはその後、銅の有機化合物からなる原料ガスを供給して、水蒸気によって酸化物層が形成された前記下地膜の表面に銅膜を成膜する銅膜成膜ステップと、
次いで銅膜の成膜された基板を搬送して前記第2の処理容器内に載置するステップと、
前記酸化物層を、前記下地膜を構成する金属と銅との合金層に変換するために水素雰囲気下で基板に熱処理を施す変換ステップと、
を実行するように各手段を制御する制御部と、を備えたことを特徴とする半導体装置の製造装置。 - 前記酸化傾向の高い金属は、チタンまたはタンタルであることを特徴とする請求項4に
記載の半導体装置の製造装置。 - 前記水蒸気供給ステップと前記銅膜成膜ステップは真空雰囲気下で行われ、
前記水蒸気供給ステップと前記銅膜成膜ステップの間も真空雰囲気が保たれる
ことを特徴とする請求項4または5に記載の半導体装置の製造装置。
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CN2007800275731A CN101490818B (zh) | 2006-07-20 | 2007-06-15 | 半导体装置的制造方法以及半导体装置的制造装置 |
KR1020097001198A KR101196501B1 (ko) | 2006-07-20 | 2007-06-15 | 반도체장치의 제조 방법, 반도체장치의 제조 장치, 컴퓨터 프로그램 및 기억 매체 |
PCT/JP2007/062140 WO2008010371A1 (fr) | 2006-07-20 | 2007-06-15 | Procédé de fabrication de dispositif semi-conducteur, appareil de fabrication de dispositif semi-conducteur, programme informatique et support de stockage |
US12/374,228 US8133811B2 (en) | 2006-07-20 | 2007-06-15 | Semiconductor device manufacturing method, semiconductor device manufacturing apparatus, computer program and storage medium |
TW096126384A TWI415217B (zh) | 2006-07-20 | 2007-07-19 | A manufacturing method of a semiconductor device, a manufacturing apparatus for a semiconductor device, a computer program, and a memory medium |
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JP5696348B2 (ja) * | 2008-08-09 | 2015-04-08 | 東京エレクトロン株式会社 | 金属回収方法、金属回収装置、排気系及びこれを用いた成膜装置 |
KR101722129B1 (ko) * | 2008-11-21 | 2017-03-31 | 가부시키가이샤 니콘 | 유지 부재 관리 장치, 적층 반도체 제조 장치, 및 유지 부재 관리 방법 |
JP2010212452A (ja) * | 2009-03-10 | 2010-09-24 | Tokyo Electron Ltd | Cu膜の成膜方法および記憶媒体 |
JP5659041B2 (ja) * | 2011-02-24 | 2015-01-28 | 東京エレクトロン株式会社 | 成膜方法および記憶媒体 |
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JP6324800B2 (ja) | 2014-05-07 | 2018-05-16 | 東京エレクトロン株式会社 | 成膜方法および成膜装置 |
US9793169B1 (en) * | 2016-06-07 | 2017-10-17 | Globalfoundries Inc. | Methods for forming mask layers using a flowable carbon-containing silicon dioxide material |
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KR20090031582A (ko) | 2009-03-26 |
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