JP6980406B2 - 半導体製造装置及び半導体装置の製造方法 - Google Patents
半導体製造装置及び半導体装置の製造方法 Download PDFInfo
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Description
Claims (15)
- 処理室が設けられる容器と、
前記処理室の内部に設けられ、半導体基板を保持するステージと、
前記半導体基板を加熱する加熱ユニットと、
前記処理室に反応性ガスを供給するガス供給ラインと、
前記処理室に連通して配置され、前記半導体基板の処理中に前記処理室内部を排気する真空ラインとを有し、
前記半導体基板は高誘電率絶縁膜を有し、
前記反応性ガスは、前記高誘電率絶縁膜に含まれる金属元素と反応して揮発性の有機金属錯体を形成するための錯体化材料ガスと、原料物質が分子骨格内に不対電子を有する元素を2個以上有し、かつ水素原子およびフッ素原子を除いて5個以上の原子を持つ有機化合物であって、前記有機金属錯体の安定性を高める錯体安定化材料ガスとを含む混合ガスであり、
前記半導体基板が所定の温度より低い温度にされた状態で、前記処理室内部に前記ガス供給ラインから前記反応性ガスが供給され、前記加熱ユニットは、前記処理室内部に前記反応性ガスが供給された後に、前記有機金属錯体が脱離する温度以上に前記半導体基板を加熱する半導体製造装置。 - 請求項1において、
前記高誘電率絶縁膜に含まれる金属元素は、周期表において第5周期およびそれ以後に分類される金属元素である半導体製造装置。 - 請求項1において、
前記高誘電率絶縁膜に含まれる金属元素は、希土類元素である半導体製造装置。 - 請求項1において、
前記ガス供給ラインに接続される第1の気化器を有し、
前記第1の気化器は、前記錯体化材料ガスの原料薬液と前記錯体安定化材料ガスの原料薬液との混合薬液を所定の温度、圧力条件下で気化させる半導体製造装置。 - 請求項4において、
前記第1の気化器に接続され、前記混合薬液を充填する薬液タンクと、
前記薬液タンクに充填されている前記混合薬液の組成をモニタし、前記混合薬液の組成調整を行う混合薬液組成調整ユニットとを有する半導体製造装置。 - 請求項4において、
前記ガス供給ラインに接続される第2の気化器を有し、
前記第2の気化器は、前記第1の気化器とは異なる原料薬液を所定の温度、圧力条件かで気化させる半導体製造装置。 - 請求項1において、
前記真空ラインに設けられ、前記処理室から排気された前記反応性ガス及び前記有機金属錯体を回収するトラップを有する半導体製造装置。 - 請求項7において、
前記トラップで回収された前記反応性ガス及び前記有機金属錯体を酸処理液と反応させることにより、前記錯体化材料ガスの原料物質と前記錯体安定化材料ガスの原料物質とを再生する分別回収装置を有する半導体製造装置。 - 高誘電率絶縁膜上に所定のパターン形状を有するマスク層が形成された半導体基板を処理室に載置し、前記処理室に連通する真空ラインにより前記処理室内部を排気させた状態で、
前記半導体基板の表面に吸着されている気体や異物を脱離させ、
前記半導体基板の温度が所定の温度より低い温度にされた状態で、前記処理室内部に反応性ガスを供給し、
前記処理室内部に前記反応性ガスが供給された後に、前記半導体基板を加熱し、
前記高誘電率絶縁膜に含まれる金属元素と反応して生じる有機金属錯体を気化させて前記処理室より排気し、
前記反応性ガスは、前記高誘電率絶縁膜に含まれる金属元素と反応して前記有機金属錯体を形成するための錯体化材料ガスと、原料物質が分子骨格内に不対電子を有する元素を2個以上有し、かつ水素原子およびフッ素原子を除いて5個以上の原子を持つ有機化合物であって、前記有機金属錯体の安定性を高める錯体安定化材料ガスとを含む混合ガスである半導体装置の製造方法。 - 請求項9において、
前記高誘電率絶縁膜に含まれる金属元素は、周期表において第5周期およびそれ以後に分類される金属元素である半導体装置の製造方法。 - 請求項9において、
前記高誘電率絶縁膜に含まれる金属元素は、希土類元素である半導体装置の製造方法。 - 請求項9において、
前記錯体化材料ガスの原料物質は、遷移金属原子に対して少なくとも2座以上の配位結合を形成し得る有機化合物、いわゆる多座配位子分子である半導体装置の製造方法。 - 請求項12において、
前記錯体化材料ガスの原料物質は、ジケトン類、ケトエステル、ケトイミンのいずれかを含む半導体装置の製造方法。 - 請求項9において、
前記錯体安定化材料ガスの原料物質は、前記不対電子を有する元素として酸素原子または窒素原子を含む有機化合物である半導体装置の製造方法。 - 請求項14において、
前記錯体安定化材料ガスの原料物質は、エーテル類である半導体装置の製造方法。
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