JP6788545B2 - タングステン膜を形成する方法 - Google Patents
タングステン膜を形成する方法 Download PDFInfo
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- JP6788545B2 JP6788545B2 JP2017087173A JP2017087173A JP6788545B2 JP 6788545 B2 JP6788545 B2 JP 6788545B2 JP 2017087173 A JP2017087173 A JP 2017087173A JP 2017087173 A JP2017087173 A JP 2017087173A JP 6788545 B2 JP6788545 B2 JP 6788545B2
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- tungsten film
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims description 126
- 239000010937 tungsten Substances 0.000 title claims description 126
- 229910052721 tungsten Inorganic materials 0.000 title claims description 126
- 239000007789 gas Substances 0.000 claims description 163
- 239000012159 carrier gas Substances 0.000 claims description 79
- 239000000758 substrate Substances 0.000 claims description 67
- 238000000034 method Methods 0.000 claims description 62
- 239000002994 raw material Substances 0.000 claims description 31
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 13
- ZOCHARZZJNPSEU-UHFFFAOYSA-N diboron Chemical compound B#B ZOCHARZZJNPSEU-UHFFFAOYSA-N 0.000 claims description 10
- 229910052786 argon Inorganic materials 0.000 claims description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 8
- NXHILIPIEUBEPD-UHFFFAOYSA-H tungsten hexafluoride Chemical compound F[W](F)(F)(F)(F)F NXHILIPIEUBEPD-UHFFFAOYSA-H 0.000 claims description 6
- 238000010926 purge Methods 0.000 description 20
- 230000015572 biosynthetic process Effects 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 101000661807 Homo sapiens Suppressor of tumorigenicity 14 protein Proteins 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 101000911772 Homo sapiens Hsc70-interacting protein Proteins 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
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- KPGXUAIFQMJJFB-UHFFFAOYSA-H tungsten hexachloride Chemical compound Cl[W](Cl)(Cl)(Cl)(Cl)Cl KPGXUAIFQMJJFB-UHFFFAOYSA-H 0.000 description 2
- 101001139126 Homo sapiens Krueppel-like factor 6 Proteins 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
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Description
工程ST11における原料ガスの流量:50sccm〜450sccm
工程ST11における第1のキャリアガスの流量:500sccm〜4500sccm
工程ST11における基板の温度:200℃〜350℃
工程ST11におけるチャンバの圧力:100Pa〜1250Pa
各サイクルにおける工程ST11の処理時間:0.5秒〜5秒
工程ST13におけるジボランガスの流量:50sccm〜4500sccm
工程ST13における第1のキャリアガスの流量:50sccm〜4500sccm
工程ST13における基板の温度:200℃〜350℃
工程ST13におけるチャンバの圧力:100Pa〜1250Pa
各サイクルにおける工程ST13の処理時間:0.5秒〜5秒
工程ST21における原料ガスの流量:50sccm〜4500sccm
工程ST21における第2のキャリアガスの流量:500sccm〜4500sccm
工程ST21における基板の温度:300℃〜530℃
工程ST21におけるチャンバの圧力:100Pa〜1250Pa
各サイクルにおける工程ST21の処理時間:0.05秒〜5秒
工程ST23における水素ガスの流量:500sccm〜9000sccm
工程ST23における第2のキャリアガスの流量:500sccm〜4500sccm
工程ST23における基板の温度:300℃〜530℃
工程ST23におけるチャンバの圧力:100Pa〜1250Pa
各サイクルにおける工程ST23の処理時間:0.05秒〜5秒
WF6ガスの流量:300sccm
N2ガスが用いられた場合のN2ガスの流量:6000sccm
Arガスが用いられた場合のArガスの流量:6000sccm
基板の温度:450℃
チャンバの圧力:500Pa
各サイクルにおける第1の工程の処理時間:1秒
<第3の工程の条件>
ジボランガスの流量:400sccm
N2ガスが用いられた場合のN2ガスの流量:6000sccm
Arガスが用いられた場合のArガスの流量:6000sccm
基板の温度:450℃
チャンバの圧力:500Pa
各サイクルにおける第3の工程の処理時間:1秒
WF6ガスの流量:180sccm
キャリアガスの流量:6000sccm
基板の温度:450℃
チャンバの圧力:500Pa
各サイクルにおける第1の工程の処理時間:0.15秒
<第3の工程の条件>
H2ガスの流量:4500sccm
キャリアガスの流量:6000sccm
基板の温度:450℃
チャンバの圧力:500Pa
各サイクルにおける第3の工程の処理時間:0.3秒
Claims (5)
- タングステン膜を形成する方法であって、
基板上に第1のタングステン膜を形成する工程と、
前記第1のタングステン膜上に第2のタングステン膜を形成する工程と、
を含み、
第1のタングステン膜を形成する前記工程では、第1のキャリアガスと共に、タングステンを含有する原料ガスとジボランガスとが交互に前記基板に供給され、
第2のタングステン膜を形成する前記工程では、第2のキャリアガスと共に、タングステンを含有する原料ガスと水素ガスとが交互に、前記第1のタングステン膜を有する前記基板に供給され、
前記第1のキャリアガスは、窒素ガスであり、
前記第2のキャリアガスは、少なくとも一種の不活性ガスから構成され、該第2のキャリアガスの全流量に対して70%以上の流量の割合で希ガスを含む、
方法。 - 前記第2のキャリアガスは、該第2のキャリアガスの全流量に対して95%以上の流量の割合で前記希ガスを含む、請求項1に記載の方法。
- 前記第2のキャリアガスは、前記希ガスのみを含む、請求項1に記載の方法。
- 前記希ガスは、アルゴンガスである、請求項1〜3の何れか一項に記載の方法。
- 第1のタングステン膜を形成する前記工程で用いられる前記原料ガス、及び、第2のタングステン膜を形成する前記工程で用いられる前記原料ガスは、六フッ化タングステンを含む、請求項1〜4の何れか一項に記載の方法。
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