JP6751631B2 - 基板の凹部をタングステンで充填する方法 - Google Patents
基板の凹部をタングステンで充填する方法 Download PDFInfo
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- 229910052721 tungsten Inorganic materials 0.000 title claims description 71
- 239000010937 tungsten Substances 0.000 title claims description 71
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims description 62
- 239000007789 gas Substances 0.000 claims description 146
- 239000000758 substrate Substances 0.000 claims description 108
- 238000000034 method Methods 0.000 claims description 94
- 238000010926 purge Methods 0.000 claims description 45
- 239000002243 precursor Substances 0.000 claims description 38
- 239000012159 carrier gas Substances 0.000 claims description 35
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 21
- 229910052739 hydrogen Inorganic materials 0.000 claims description 21
- 239000001257 hydrogen Substances 0.000 claims description 21
- 239000011261 inert gas Substances 0.000 claims description 21
- -1 tungsten halide Chemical class 0.000 claims description 9
- 230000007547 defect Effects 0.000 description 9
- 238000009792 diffusion process Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 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
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000013067 intermediate product Substances 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 238000000231 atomic layer deposition Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45523—Pulsed gas flow or change of composition over time
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Description
・工程S11における前駆体ガスの流量:10sccm〜120sccm
・工程S12におけるパージガスの流量:1000sccm〜10000sccm
・工程S13における水素含有ガスの流量:3000sccm〜10000sccm
・工程S14におけるパージガスの流量:1000sccm〜10000sccm
・第1サイクルCY1におけるキャリアガスの流量:100sccm〜2000sccm
・第1サイクルCY1におけるチャンバ12cの圧力:2000Pa〜5000Pa
・第1サイクルCY1におけるステージ24と壁面16fとの間のギャップ長:8mm〜15mm
・第1サイクルCY1における基板SBの温度(ステージ24の温度):500℃〜600℃
・工程S21における前駆体ガスの流量:10sccm〜120sccm
・工程S22におけるパージガスの流量:7000sccm〜16000sccm
・工程S23における水素含有ガスの流量:3000sccm〜10000sccm
・工程S24におけるパージガスの流量:7000sccm〜16000sccm
・第2サイクルCY2におけるキャリアガスの流量:1000sccm〜3000sccm
・第2サイクルCY2におけるチャンバ12cの圧力:100Pa〜3500Pa
・第2サイクルCY2におけるステージ24と壁面16fとの間のギャップ長:3mm〜10mm
・第2サイクルCY2における基板SBの温度(ステージ24の温度):450℃〜550℃
・工程S31における前駆体ガスの流量:10sccm〜120sccm
・工程S32におけるパージガスの流量:1000sccm〜10000sccm
・工程S33における水素含有ガスの流量:3000sccm〜10000sccm
・工程S34におけるパージガスの流量:1000sccm〜10000sccm
・第3サイクルCY3におけるキャリアガスの流量:100sccm〜2000sccm
・第3サイクルCY3におけるチャンバ12cの圧力:2000Pa〜5000Pa
・第3サイクルCY3におけるステージ24と壁面16fとの間のギャップ長:8mm〜15mm
・第3サイクルCY3における基板SBの温度(ステージ24の温度):500℃〜600℃
Claims (11)
- 基板の凹部をタングステンで充填する方法であって、
前記基板を成膜装置のチャンバ内に準備する工程と、
タングステンを含有する前駆体ガスを前記チャンバに導入すること、前記チャンバをパージすること、水素含有ガスを前記チャンバに導入すること、及び、前記チャンバをパージすることを含む第1サイクルを1回以上実行する工程と、
第1サイクルを1回以上実行する前記工程の後に、タングステンを含有する前駆体ガスを前記チャンバに導入すること、前記チャンバをパージすること、水素含有ガスを前記チャンバに導入すること、及び、前記チャンバをパージすることを含む第2サイクルを1回以上実行する工程と、
第2サイクルを1回以上実行する前記工程の後に、タングステンを含有する前駆体ガスを前記チャンバに導入すること、前記チャンバをパージすること、水素含有ガスを前記チャンバに導入すること、及び、前記チャンバをパージすることを含む第3サイクルを1回以上実行する工程と、
を含み、
前記第2サイクルが実行されているときの前記チャンバの圧力が、前記第1サイクルが実行されているときの前記チャンバの圧力よりも低い圧力に設定され、
前記第3サイクルが実行されているときの前記チャンバの圧力が、前記第2サイクルが実行されているときの前記チャンバの圧力よりも高い圧力に設定される、
方法。 - 前記成膜装置は、
前記チャンバを提供するチャンバ本体と、
前記チャンバ内に設けられておりその上に前記基板が載置されるステージと、
を備え、
前記チャンバ本体は、前記ステージの上方において延在し、前記ステージの上面に対面する壁面を含み、
前記第2サイクルが実行されているときの前記ステージと前記壁面との間の距離が、前記第1サイクルが実行されているときの前記ステージと前記壁面との間の距離よりも短い距離に設定される、
請求項1に記載の方法。 - 前記第2サイクルが実行されているときの前記基板の温度が、前記第1サイクルが実行されているときの前記基板の温度よりも低い温度に設定される、請求項1又は2に記載の方法。
- 前記第2サイクルが実行されているときに前記チャンバに導入されるキャリアガスの流量が、前記第1サイクルが実行されているときに前記チャンバに導入されるキャリアガスの流量よりも大きい流量に設定される、請求項1〜3の何れか一項に記載の方法。
- 前記第2サイクルにおいて前記チャンバをパージしているときに該チャンバに導入される不活性ガスの流量が、前記第1サイクルにおいて前記チャンバをパージしているときに該チャンバに導入される不活性ガスの流量よりも大きい流量に設定される、請求項1〜4の何れか一項に記載の方法。
- 前記成膜装置は、
前記チャンバを提供するチャンバ本体と、
前記チャンバ内に設けられておりその上に前記基板が載置されるステージと、
を備え、
前記チャンバ本体は、前記ステージの上方において延在し、前記ステージの上面に対面する壁面を含み、
前記第2サイクルが実行されているときの前記ステージと前記壁面との間の距離が、前記第1サイクルが実行されているときの前記ステージと前記壁面との間の距離、及び、前記第3サイクルが実行されているときの前記ステージと前記壁面との間の距離よりも短い距離に設定される、
請求項1に記載の方法。 - 前記第2サイクルが実行されているときの前記基板の温度が、前記第1サイクルが実行されているときの前記基板の温度、及び、前記第3サイクルが実行されているときの前記基板の温度よりも低い温度に設定される、請求項1又は6に記載の方法。
- 前記第2サイクルが実行されているときに前記チャンバに導入されるキャリアガスの流量が、前記第1サイクルが実行されているときに前記チャンバに導入されるキャリアガスの流量、及び、前記第3サイクルが実行されているときに前記チャンバに導入されるキャリアガスの流量よりも大きい流量に設定される、請求項1、6、及び7の何れか一項に記載の方法。
- 前記第2サイクルにおいて前記チャンバをパージしているときに該チャンバに導入される不活性ガスの流量が、前記第1サイクルにおいて前記チャンバをパージしているときに該チャンバに導入される不活性ガスの流量、及び、前記第3サイクルにおいて前記チャンバをパージしているときに該チャンバに導入される不活性ガスの流量よりも大きい流量に設定される、請求項1及び6〜8の何れか一項に記載の方法。
- 前記前駆体ガスは、ハロゲン化タングステンを含有するガスである、請求項1及び6〜9の何れか一項に記載の方法。
- 前記ハロゲン化タングステンは、WCl6、WCl5、又は、WF6である、請求項10に記載の方法。
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