JP5546552B2 - 液体を制御された複数領域基板支持体による改良基板温度制御 - Google Patents
液体を制御された複数領域基板支持体による改良基板温度制御 Download PDFInfo
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Description
Claims (20)
- プラズマ処理装置の反応チャンバ内で用いる基板支持体であって、
ベース部材と、
前記ベース部材の上に位置する熱伝導部材であって、第1の流路を内部に備えた第1の領域と、第2の流路を内部に備えた第2の領域とを少なくとも含む複数の領域を有し、前記熱伝導部材の前記第1および第2の領域を個別に加熱および冷却するために、前記流路を通して液体を循環させることが可能である熱伝導部材と、
前記熱伝導部材の上に位置する静電チャックであって、前記プラズマ処理装置の前記反応チャンバ内で基板を支持するための支持面を有する静電チャックと、
前記第1および第2の流路と流体連通した冷液源および温液源と、
前記第1および第2の流路内を循環する前記温液および前記冷液の混合比を調節することにより、前記第1および第2の領域内の前記液体の温度を独立的に制御するよう動作可能なバルブ構成と、
前記第1および第2の流路内の前記温液および前記冷液の前記混合比を調節することによって前記第1および第2の領域内の前記温度を独立的に制御するために、前記バルブ構成を制御する制御部と
を備える基板支持体。 - 請求項1に記載の基板支持体であって、さらに、
前記第1および第2の領域の温度を測定して、入力信号を前記制御部に供給するよう適合された前記第1の領域の第1の温度センサおよび前記第2の領域の第2の温度センサと、
前記第1および第2の領域を隔てる熱バリアと、
前記熱伝導部材と前記ベース部材との間に位置し、0.1W・m -1 K -1 から4W・m -1 K -1 までの熱伝導率を有し、1ミルから200ミルまでの厚さを有する結合材と
を備える基板支持体。 - 請求項1に記載の基板支持体であって、
前記冷液源は、≧−10℃の温度に前記冷液を維持し、前記温液源は、≦150℃の温度に前記温液を維持し、前記温液の温度は、前記冷液の温度よりも高い基板支持体。 - 請求項2に記載の基板支持体であって、前記熱伝導部材は円板であり、各領域は、前記円板の中心に対して異なる半径方向距離に同心円状に配置され、前記熱バリアは環状チャネルである基板支持体。
- 請求項4に記載の基板支持体であって、前記環状チャネルは空であるか、もしくは、0.1から4.0W・m -1 K -1 までの熱伝導率を有するエポキシ、シリコーン、または、その他の材料で満たされる基板支持体。
請求項2に記載の基板支持体であって、前記結合材は、シリコーンまたはエポキシで構成され、酸化アルミニウム、窒化ホウ素、酸化シリコン、アルミニウム、または、シリコンを含む1または複数の充填材を含有するか、もしくは、前記結合材は、金属ろう材で構成される基板支持体。 - 請求項4に記載の基板支持体であって、前記環状チャネルは、前記熱伝導部材の厚さ全体を通して伸びるか、もしくは、前記熱伝導部材の厚さの一部を通して伸びる基板支持体。
- 請求項2に記載の基板支持体であって、前記結合材は、シリコーンまたはエポキシで構成され、酸化アルミニウム、窒化ホウ素、酸化シリコン、アルミニウム、または、シリコンを含む1または複数の充填材を含有するか、もしくは、前記結合材は、金属ろう材で構成される基板支持体。
- 請求項1に記載の基板支持体であって、前記熱伝導部材は、アルミニウムまたはアルミニウム合金で構成されるか、もしくは、ステンレス鋼、酸化アルミニウム、または、酸化イットリウムで構成される基板支持体。
- プラズマ処理中に半導体基板の方位角方向の温度を制御する方法であって、
請求項1の基板支持体上に前記基板を支持する工程であって、前記基板は、前記複数の領域と熱的に接触する工程と、
前記第1および第2の流路に前記液体を流す工程と、
前記第1の領域の温度を測定し、前記第1の領域の前記温度が前記第1の領域の目標温度よりも低い場合に、前記冷液に対する前記温液の前記混合比を高くすることによって、前記第1の流路を流れる前記液体の前記温度を上昇させ、前記第1の領域の前記温度が前記目標温度よりも高い場合に、前記冷液に対する前記温液の前記混合比を低くすることによって、前記第1の流路を流れる前記液体の前記温度を低下させる工程と、
前記第2の領域の温度を測定し、前記第2の領域の前記温度が前記第2の領域の目標温度よりも低い場合に、前記冷液に対する前記温液の前記混合比を高くすることによって、前記第2の流路を流れる前記液体の前記温度を上昇させ、前記第2の領域の前記温度が前記目標温度よりも高い場合に、前記冷液に対する前記温液の前記混合比を低くすることによって、前記第2の流路を流れる前記液体の前記温度を低下させる工程と
を備え、
各領域内の方位角方向の温度差は、5℃未満である方法。 - 請求項9に記載の方法であって、前記複数の領域にわたる前記方位角方向の温度差は、0.5℃未満であり、前記基板にわたる半径方向の温度プロファイルは、(a)前記基板全体にわたって温度が均一であるプロファイルと、(b)前記基板にわたって温度が非均一で、前記基板の中央部領域が前記基板の縁部領域よりも熱いまたは冷たいプロファイルとの間で段階的に変更可能である方法。
- 請求項9に記載の方法であって、前記第1の領域の前記目標温度および前記第2の領域の前記目標温度は、(a)基板半径に沿って単調に上昇または低下するか、もしくは、(b)前記基板半径に沿って非単調に上昇または低下する方法。
- 請求項9に記載の方法であって、さらに、
前記反応チャンバ内に処理ガスを導入する工程と、
前記処理ガスをプラズマ状態に励起する工程と、
前記プラズマで前記基板を処理する工程と
を備え、
前記プラズマで前記基板を処理する工程は、(a)半導体材料、金属、または、誘電材料の層のプラズマエッチング、または、(b)導電材料または誘電材料の蒸着を含む方法。 - プラズマ処理装置であって、請求項1に記載の半導体基板支持体を備え、前記プラズマ処理装置は、半導体、金属、または、誘電材料をエッチングするよう適合されたプラズマエッチャ、もしくは、導電材料または誘電材料を蒸着するよう適合された蒸着チャンバであるプラズマ処理装置。
- プラズマ処理装置の反応チャンバ内で用いる基板支持体であって、
ベース部材と、
前記ベース部材の上に位置する熱伝導部材であって、第1の流路を備えた第1の領域と、第2の流路を備えた第2の領域とを有し、前記流路は、前記熱伝導部材の各領域を個別に加熱および冷却するために液体を循環させるよう適合されている熱伝導部材と、
前記第1の流路と流体連通する第1の共通ラインと、
前記第2の流路と流体連通する第2の共通ラインと、
前記第1の共通ラインと温液源からの第1の供給ラインとに流体連通し、前記温液源から前記第1の共通ラインに流れる温液の流量を制御するよう動作可能な第1のバルブと、
前記第1の共通ラインと冷液源からの第2の供給ラインとに流体連通し、前記冷液源から前記第1の共通ラインに流れる冷液の流量を制御するよう動作可能な第2のバルブと、
前記第2の共通ラインと前記温液源からの前記第1の供給ラインとに流体連通し、前記第2の共通ラインに流れる前記温液の流量を制御するよう動作可能な第3のバルブと、
前記第2の共通ラインと前記冷液源からの前記第2の供給ラインとに流体連通し、前記第2の共通ラインに流れる前記冷液の流量を制御するよう動作可能な第4のバルブと、
(a)前記第1の流路に対する前記温液および前記冷液の第1の混合比を調節するために前記第1のバルブおよび前記第2のバルブを、ならびに、(b)前記第2の流路に対する前記温液および前記冷液の第2の混合比を調節するために前記第3のバルブおよび前記第4のバルブを、独立的に制御するよう動作可能な制御部と、
前記熱伝導部材の上に位置する静電チャックであって、前記プラズマ処理装置の前記反応チャンバ内で基板を支持するための支持面を有する静電チャックと
を備える基板支持体。 - 請求項14に記載の基板支持体であって、
前記熱伝導部材は、第3の流路を備えた第3の領域と、第4の流路を備えた第4の領域と、第5の流路を備えた第5の領域とを有し、
前記基板支持体は、さらに、
前記第3の流路と流体連通する第3の共通ラインと、
前記第4の流路と流体連通する第4の共通ラインと、
前記第5の流路と流体連通する第5の共通ラインと、
前記第3の共通ラインと前記温液源からの前記第1の供給ラインとに流体連通し、前記第3の共通ラインに流れる前記温液の流量を制御するよう動作可能な第5のバルブと、
前記第3の共通ラインと前記冷液源からの前記第2の供給ラインとに流体連通し、前記第3の共通ラインに流れる前記冷液の流量を制御するよう動作可能な第6のバルブと、
前記第4の共通ラインと前記温液源からの前記第1の供給ラインとに流体連通し、前記第4の共通ラインに流れる前記温液の流量を制御するよう動作可能な第7のバルブと、
前記第4の共通ラインと前記冷液源からの前記第2の供給ラインとに流体連通し、前記第4の共通ラインに流れる前記冷液の流量を制御するよう動作可能な第8のバルブと、
前記第5の共通ラインと前記温液源からの前記第1の供給ラインとに流体連通し、前記第5の共通ラインに流れる前記温液の流量を制御するよう動作可能な第9のバルブと、
前記第5の共通ラインと前記冷液源からの前記第2の供給ラインとに流体連通し、前記第5の共通ラインに流れる前記冷液の流量を制御するよう動作可能な第10のバルブと
を備え、
前記制御部は、さらに、
(c)前記第3の流路に対する前記温液および前記冷液の第3の混合比を調節するために前記第5のバルブおよび前記第6のバルブを、
(d)前記第4の流路に対する前記温液および前記冷液の第4の混合比を調節するために前記第7のバルブおよび前記第8のバルブを、
(e)前記第5の流路に対する前記温液および前記冷液の第5の混合比を調節するために前記第9のバルブおよび前記第10のバルブを、独立的に制御するよう動作可能である基板支持体。 - 請求項14に記載の基板支持体であって、前記熱伝導部材は円板であり、各領域は、前記円板の中心に対して異なる半径方向距離に同心円状に配置されている基板支持体。
- 請求項16に記載の基板支持体であって、前記第1の流路、前記第2の流路、前記第3の流路、前記第4の流路、および、前記第5の流路は、戻りラインに流体連通しており、前記戻りラインは、前記温液源および/または前記冷液源に流体連通している基板支持体。
- プラズマ処理装置の反応チャンバ内で用いる基板支持体であって、
ベース部材と、
前記ベース部材の上に位置する熱伝導部材であって、第1の流路を備えた第1の領域と、第2の流路を備えた第2の領域とを有し、前記流路は、前記熱伝導部材の各領域を個別に加熱および冷却するために液体を循環させるよう適合されている熱伝導部材と、
前記第1の流路および液体源と流体連通する供給ラインと、
前記供給ラインに沿って配置され、前記液体が前記第1の流路に循環される前に、前記液体源から流れる前記液体を第1の温度に加熱するよう適合された第1の加熱素子と、
前記第1の流路および前記第2の流路と流体連通し、前記液体を前記第1の流路から前記第2の流路に流すよう適合された第1の移送ラインと、
前記第1の移送ラインに沿って配置され、前記第2の流路に循環する前に、前記液体を第2の温度に加熱するよう適合された第2の加熱素子と、
各加熱素子への電力を調節することによって各領域の温度を独立的に制御するように各加熱素子を制御する制御部と、
前記熱伝導部材の上に位置する静電チャックであって、前記プラズマ処理装置の前記反応チャンバ内で基板を支持するための支持面を有する静電チャックと
を備える基板支持体。 - 請求項18に記載の基板支持体であって、
前記熱伝導部材は、第3の流路を備えた第3の領域と、第4の流路を備えた第4の領域と、第5の流路を備えた第5の領域とを有し、
前記基板支持体は、さらに、
前記第2の流路および前記第3の流路と流体連通し、前記液体を前記第2の流路から前記第3の流路に流すよう適合された第2の移送ラインと、
前記第2の移送ラインに沿って配置され、前記第3の流路に循環する前に、前記液体を第3の温度に加熱するよう適合された第3の加熱素子と、
前記第3の流路および前記第4の流路と流体連通し、前記液体を前記第3の流路から前記第4の流路に流すよう適合された第3の移送ラインと、
前記第3の移送ラインに沿って配置され、前記第4の流路に循環する前に、前記液体を第4の温度に加熱するよう適合された第4の加熱素子と、
前記第4の流路および前記第5の流路と流体連通し、前記液体を前記第4の流路から前記第5の流路に流すよう適合された第4の移送ラインと、
前記第4の移送ラインに沿って配置され、前記第5の流路に循環する前に、前記液体を第5の温度に加熱するよう適合された第5の加熱素子と、
前記第5の流路および前記液体源と流体連通し、前記液体を前記第5の流路から前記液体源に流すよう適合された戻りラインと
を備える基板支持体。 - 請求項18に記載の基板支持体であって、さらに、各領域の温度を測定して入力信号を前記制御部に供給するよう適合された温度センサを各領域に備え、前記第1の移送ラインは、前記液体を前記第1の流路から前記第2の流路に順方向または逆方向で流すよう適合される基板支持体。
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