JP7018825B2 - 成膜方法及び成膜装置 - Google Patents
成膜方法及び成膜装置 Download PDFInfo
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Description
本開示の一実施形態に係る成膜方法を実施するための成膜装置について、プラズマ処理装置を例に挙げて説明する。図1は、プラズマ処理装置の一例を示す概略断面図である。
本開示の一実施形態に係る成膜方法について、図1のプラズマ処理装置1を用いてTi膜を成膜する場合を例に挙げて説明する。図2は、成膜方法の一例を示すフローチャートである。
(実施例1)
実施例1では、ウエハWを予備加熱する際に処理容器2内に導入するガス種を変更したときのウエハWの裏面に生じる欠陥数を比較した。
・ステップS11A
時間:2sec
ステージ上面とウエハ裏面との間隔:1mm
ガス流量:Ar(1440sccm)
Ar流量ランプアップ時間:2sec
処理容器内の圧力:真空で引き切り
・ステップS12A
時間:13sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:Ar(3600sccm)
Ar流量ランプアップ時間:3sec
処理容器内の圧力:1200Pa
・ステップS11B
時間:2sec
ステージ上面とウエハ裏面との間隔:1mm
ガス流量:N2(1440sccm)
N2流量ランプアップ時間:2sec
処理容器内の圧力:真空で引き切り
・ステップS12B
時間:13sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:N2(3600sccm)
N2流量ランプアップ時間:3sec
処理容器内の圧力:1200Pa
・ステップS11C
時間:2sec
ステージ上面とウエハ裏面との間隔:1mm
ガス流量:H2(1600sccm)
H2流量ランプアップ時間:2sec
処理容器内の圧力:真空で引き切り
・ステップS12C
時間:13sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:H2(4000sccm)
H2流量ランプアップ時間:3sec
処理容器内の圧力:1200Pa
実施例2では、ウエハWを予備加熱する際に処理容器2内に導入するガス種を変更し、かつ、ウエハW上にTi膜を形成したときのウエハWの裏面に生じる欠陥数を比較した。
・ステップS21A
時間:2sec
ステージ上面とウエハ裏面との間隔:1mm
ガス流量:Ar(1440sccm)
Ar流量ランプアップ時間:2sec
処理容器内の圧力:真空で引き切り
・ステップS22A
時間:13sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:Ar(3600sccm)
Ar流量ランプアップ時間:3sec
処理容器内の圧力:1200Pa
・ステップS23A
時間:6sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:Ar(100~3000sccm)、H2(125~6250sccm)
Ar流量ランプダウン時間:3sec
H2流量ランプアップ時間:3sec
処理容器内の圧力:100~800Pa
・ステップS24A
時間:8sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:TiCl4(1.0~30.0sccm)、Ar(100~3000sccm)、H2(125~6250sccm)
処理容器内の圧力:100~800Pa
・ステップS21B
時間:2sec
ステージ上面とウエハ裏面との間隔:1mm
ガス流量:H2(1600sccm)
H2流量ランプアップ時間:2sec
処理容器内の圧力:真空で引き切り
・ステップS22B
時間:13sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:H2(4000sccm)
H2流量ランプアップ時間:3sec
処理容器内の圧力:1200Pa
・ステップS23B
時間:6sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:Ar(100~3000sccm)、H2(125~6250sccm)
Ar流量ランプダウン時間:3sec
H2流量ランプアップ時間:3sec
処理容器内の圧力:100~800Pa
・ステップS24B
時間:8sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:TiCl4(1.0~30.0sccm)、Ar(100~3000sccm)、H2(125~6250sccm)
処理容器内の圧力:100~800Pa
実施例3では、処理容器2内にウエハWを搬入する際の昇降ピン41の移動速度を変化させたときのウエハWの裏面に生じる欠陥数を比較した。
・ステップS31A
時間:2sec
ステージ上面とウエハ裏面との間隔:1mm
ガス流量:Ar(1440sccm)
Ar流量ランプアップ時間:2sec
処理容器内の圧力:真空で引き切り
・ステップS32A
時間:13sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:Ar(3600sccm)
Ar流量ランプアップ時間:3sec
処理容器内の圧力:1200Pa
・ステップS31B
時間:2sec
ステージ上面とウエハ裏面との間隔:1mm
ガス流量:H2(1600sccm)
H2流量ランプアップ時間:2sec
処理容器内の圧力:真空で引き切り
・ステップS32B
時間:13sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:H2(4000sccm)
H2流量ランプアップ時間:3sec
処理容器内の圧力:1200Pa
実施例4では、ウエハWにTi膜を形成するときのH2ガスとArガスとの流量比であるH2/Ar流量比を変化させたときのウエハWの裏面に生じる欠陥数を比較した。
・ステップS41A
時間:2sec
ステージ上面とウエハ裏面との間隔:1mm
ガス流量:Ar(1440sccm)
Ar流量ランプアップ時間:2sec
処理容器内の圧力:真空で引き切り
・ステップS42A
時間:13sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:Ar(3600sccm)
Ar流量ランプアップ時間:3sec
処理容器内の圧力:1200Pa
・ステップS43A
時間:6sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:Ar(100~2000sccm)、H2(500~10000sccm)
Ar流量ランプダウン時間:3sec
H2流量ランプアップ時間:3sec
処理容器内の圧力:100~800Pa
・ステップS44A
時間:8sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:TiCl4(1.0~30.0sccm)、Ar(100~2000sccm)、H2(500~10000sccm)
処理容器内の圧力:100~800Pa
・ステップS41B
時間:2sec
ステージ上面とウエハ裏面との間隔:1mm
ガス流量:Ar(1440sccm)
Ar流量ランプアップ時間:2sec
処理容器内の圧力:真空で引き切り
・ステップS42B
時間:13sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:Ar(3600sccm)
Ar流量ランプアップ時間:3sec
処理容器内の圧力:1200Pa
・ステップS43B
時間:6sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:Ar(100~2000sccm)、H2(125~2500sccm)
Ar流量ランプダウン時間:3sec
H2流量ランプアップ時間:3sec
処理容器内の圧力:100~800Pa
・ステップS44B
時間:8sec
ステージ上面とウエハ裏面との間隔:0mm
ガス流量:Ar(100~2000sccm)、H2(125~2500sccm)
処理容器内の圧力:100~800Pa
3 ステージ
5 ガス供給部
34 加熱機構
41 昇降ピン
100 制御部
W ウエハ
Claims (8)
- 処理容器内に設けられ、上面から突出可能であり且つ基板を支持する複数の昇降ピンを有する載置台の前記複数の昇降ピンを上昇させて基板を受け取り、前記複数の昇降ピンを下降させて前記基板を載置台の上面に載置する搬入工程と、
前記処理容器内に不活性ガスを導入した状態で前記載置台に載置された前記基板を加熱する予備加熱工程と、
前記処理容器内に処理ガスを導入して前記基板に膜を形成する成膜工程と、
を有し、
前記成膜工程で導入される前記処理ガスは、TiCl 4 ガスと、H 2 ガスと、Arガスとを有し、
前記成膜工程は、成膜初期に前記H 2 ガスの供給量を徐々に設定流量まで増加させ、前記Arガスの供給量を徐々に設定流量まで減少させるステップを有する、
成膜方法。 - 前記予備加熱工程は、前記載置台の上面と前記基板の裏面との間に隙間を設けた状態で前記基板を加熱するステップを有する、
請求項1に記載の成膜方法。 - 前記予備加熱工程は、加熱初期に前記不活性ガスの供給量を徐々に設定流量まで増加させるステップを有する、
請求項1又は2に記載の成膜方法。 - 前記予備加熱工程で導入される前記不活性ガスはArガス又はN2ガスである、
請求項1乃至3のいずれか一項に記載の成膜方法。 - 前記搬入工程では、前記複数の昇降ピンを1~15mm/secの速度で移動させる、
請求項1乃至4のいずれか一項に記載の成膜方法。 - 前記成膜工程は、前記処理ガスのプラズマを用いて前記基板に膜を形成するステップを有する、
請求項1乃至5のいずれか一項に記載の成膜方法。 - 前記成膜工程で導入される前記H2ガスと前記Arガスとの流量比であるH2/Ar流量比は2~10である、
請求項1乃至6のいずれか一項に記載の成膜方法。 - 処理容器と、
前記処理容器内に設けられ、上面から突出可能であり且つ基板を支持する複数の昇降ピンを有する載置台と、
前記載置台に載置された前記基板を加熱する加熱機構と、
前記処理容器内に処理ガス及び不活性ガスを供給するガス供給部と、
制御部と、
を有し、
前記制御部は、
前記複数の昇降ピンを上昇させて基板を受け取り、前記複数の昇降ピンを下降させて前記基板を載置台の上面に載置する工程と、
前記ガス供給部により前記処理容器内に前記不活性ガスを導入した状態で、前記加熱機構により前記載置台に載置された前記基板を加熱する工程と、
前記ガス供給部により前記処理容器内に前記処理ガスを導入して前記基板に膜を形成する工程と、
を実行するように前記載置台、前記加熱機構、及び前記ガス供給部の動作を制御し、
前記基板に膜を形成する工程で導入される前記処理ガスは、TiCl 4 ガスと、H 2 ガスと、Arガスとを有し、
前記基板に膜を形成する工程は、成膜初期に前記H 2 ガスの供給量を徐々に設定流量まで増加させ、前記Arガスの供給量を徐々に設定流量まで減少させるステップを有する、
成膜装置。
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