JP6763325B2 - 半導体装置の製造方法、基板処理装置及び真空処理装置 - Google Patents
半導体装置の製造方法、基板処理装置及び真空処理装置 Download PDFInfo
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- JP6763325B2 JP6763325B2 JP2017046467A JP2017046467A JP6763325B2 JP 6763325 B2 JP6763325 B2 JP 6763325B2 JP 2017046467 A JP2017046467 A JP 2017046467A JP 2017046467 A JP2017046467 A JP 2017046467A JP 6763325 B2 JP6763325 B2 JP 6763325B2
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Description
前記基板の表面に重合用の原料を供給して、尿素結合を有する重合体からなる第1のマスク用の膜を形成する工程と、
前記第1のマスク用の膜上に積層されるように、第2のマスク用の無機膜を形成する工程と、
前記第1のマスク用の膜及び前記第2のマスク用の無機膜にパターンを形成し、前記基板の表面にイオン注入を行う工程と、
前記イオン注入後に前記第2のマスク用の無機膜を除去する工程と、
前記イオン注入後に基板を加熱して前記重合体を解重合して前記第1のマスク用の膜を除去する工程と、
を含むことを特徴とする。
前記第1のマスク用の膜上に積層されるように、第2のマスク用の無機膜を形成する第2の成膜部と、
前記第2のマスク用の無機膜上に積層されるようにレジスト膜を形成する第3の成膜部と、
前記レジスト膜が露光された後の前記基板を加熱処理する加熱処理部と、
加熱処理された前記基板を現像するための現像処理部と、
基板を処理する各部の間の搬送を行うための搬送機構と、を備え、
前記第1の成膜部は、前記基板を載置する載置台と、当該載置台に載置された前記基板に重合用の液体を基板に供給する原料吐出部と、を含むことを特徴とする。
前記イオン注入後に真空雰囲気で前記第2のマスク用の膜を除去するためのエッチングガスを前記基板に供給するエッチング処理モジュールと、
前記イオン注入後に真空雰囲気で前記基板を加熱して前記重合体を解重合して前記第1のマスク用の膜を除去する除去モジュールと、
を含むことを特徴とする。
以下、本発明に関連して行われた評価試験について説明する。
・評価試験1
評価試験1として、1辺が8cmの正方形状の基板の表面にポリ尿素膜21を成膜し、当該ポリ尿素膜21の膜厚と屈折率とを測定した後、直径が300mmのウエハW上に当該基板を粘着テープにより固定された状態でイオン注入を行った。イオン注入後、ポリ尿素膜21の膜厚と屈折率とを測定した。然る後、ウエハを350℃で5分間加熱するか、あるいは450℃で5分間加熱した。そして、この加熱処理後のポリ尿素膜21の状態を調べた。
評価試験2として、ポリ尿素膜21をウエハWに成膜後、フーリエ変換赤外分光光度計(FT−IR)を用いてポリ尿素膜21中の尿素結合の存在を示す特定の波長のピーク(初期尿素結合ピークとする)の大きさと、ポリ尿素膜21中の骨格をなすCH結合の存在を示す特定の波長のピーク(初期CH結合ピークとする)の大きさとを夫々取得した。その後、イオン注入を行わずにアニール処理をするか、評価試験1−1と同じ処理条件(低ドーズ、高エネルギー)でPをイオン注入した後でアニール処理をするか、あるいは評価試験1−3と同じ処理条件(高ドーズ、低エネルギー)でPをイオン注入した後でアニール処理をするかのいずれかを行った。イオン注入を行わずにアニール処理したものを評価試験2−1、評価試験1−1と同じ処理条件でイオン注入した後、アニール処理したものを評価試験2−2、評価試験1−3と同じ処理条件でイオン注入した後、アニール処理したものを評価試験2−3とする。これら評価試験2−1〜評価試験2−3のアニール処理は5分間、ウエハW毎に異なる温度で行った。
アミンとしてH6XDAを気化させて生成した蒸気、イソシアネートとしてH6XDIを気化させて生成した蒸気をウエハWに供給してポリ尿素膜21を形成した。ただし、この評価試験3では、図16で説明したCVDモジュール101とは異なり、ウエハWの一端側から他端側へ向けて水平方向に各蒸気が供給されるCVD装置を用いて成膜を行った。H6XDAとしては85℃に加熱して、気化量は0.3g/分とした。H6XDIとしては110℃に加熱して、気化量は0.1g/分とした。これらの蒸気のウエハWへの供給は300秒間行い、真空容器101内の圧力は0.2Torr(26.67Pa)とした。また、蒸気の供給中におけるウエハWの温度は処理を行う度に変更しており、80℃、70℃または60℃に設定した。成膜が行われたウエハWについては、面内の各部に形成されたポリ尿素膜21の膜厚を測定した。
アミンであるH6XDAをアセトンに加えて第1の薬液を、イソシアネートであるH6XDIをアセトンに加えて第2の薬液を夫々調製した。そして、これらの薬液を互いに混合して混合溶液として調製した直後に、1500rpmで回転する基板にスピンコーティングした。然る後、形成された膜の重量と膜厚とを測定した。第1の薬液、第2の薬液中のH6XDA、H6XDIの濃度は、塗布を行う毎に変更し、互いに同じ濃度の第1の薬液、第2の薬液を混合して混合溶液を調製した。
14 Si層
21 ポリ尿素膜
22 無機膜
23 レジスト膜
3 塗布、現像装置
36 無機膜形成モジュール
37 レジスト膜形成モジュール
38 現像モジュール
5 ポリ尿素膜形成モジュール
6 真空処理装置
6B 第2の搬送機構
7 エッチング処理モジュール
8 ドーピングモジュール
Claims (11)
- 基板に対して処理を行い、半導体装置を製造する方法において、
前記基板の表面に重合用の原料を供給して、尿素結合を有する重合体からなる第1のマスク用の膜を形成する工程と、
前記第1のマスク用の膜上に積層されるように、第2のマスク用の無機膜を形成する工程と、
前記第1のマスク用の膜及び前記第2のマスク用の無機膜にパターンを形成し、前記基板の表面にイオン注入を行う工程と、
前記イオン注入後に前記第2のマスク用の無機膜を除去する工程と、
前記イオン注入後に基板を加熱して前記重合体を解重合して前記第1のマスク用の膜を除去する工程と、
を含むことを特徴とする半導体装置の製造方法。 - 前記第1のマスク用の膜及び前記第2のマスク用の無機膜にパターンを形成する工程は、第2のマスク用の膜上にレジスト膜を積層し、次いで当該レジスト膜にパターンを形成し、続いて当該レジスト膜のパターンを第1のマスク用の膜及び第2のマスク用の無機膜に転写する工程を含み、
前記イオン注入を行うまでに前記レジスト膜を除去する工程を含むことを特徴とする請求項1記載の半導体装置の製造方法。 - 前記第1のマスク用の膜を除去する工程は、前記基板を300℃〜450℃に加熱して行われることを特徴とする請求項1または2記載の半導体装置の製造方法。
- 前記第2のマスク用の無機膜は、シリコンを含む膜であることを特徴とする請求項1ないし3のいずれか一つに記載の半導体装置の製造方法。
- 前記第1のマスク用の膜を形成する工程は、イソシアネートの液体とアミンの液体とを前記基板に供給すると共に、加熱された当該基板の表面で前記イソシアネートとアミンとを重合反応させる工程であることを特徴とする請求項1ないし4のいずれか一つに記載の半導体装置の製造方法。
- 前記イソシアネートの液体とアミンの液体とを前記基板に供給する工程は、
イソシアネートの液体が貯留される第1の供給源から第1の流路へイソシアネートの液体を供給する工程と、
アミンの液体が貯留される第2の供給源から第2の流路へ当該アミンの液体を供給する工程と、
前記第1の流路の下流側と前記第2の流路の下流側とが合流して形成される合流路に前記イソシアネートの液体と前記アミンの液体とを供給し、これらの液体を混合して、ノズルから前記基板に吐出する工程と、
を含むことを特徴とする請求項5記載の半導体装置の製造方法。 - 前記第1のマスク用の膜を形成する工程は、イソシアネートの蒸気とアミンの蒸気とを前記基板に供給すると共に当該基板を加熱してイソシアネートとアミンとを重合反応させる工程であることを特徴とする請求項1ないし4のいずれか一つに記載の半導体装置の製造方法。
- 基板の表面に、尿素結合を有する重合体からなる第1のマスク用の膜を形成する第1の成膜部と、
前記第1のマスク用の膜上に積層されるように、第2のマスク用の無機膜を形成する第2の成膜部と、
前記第2のマスク用の無機膜上に積層されるようにレジスト膜を形成する第3の成膜部と、
前記レジスト膜が露光された後の前記基板を加熱処理する加熱処理部と、
加熱処理された前記基板を現像するための現像処理部と、
基板を処理する各部の間の搬送を行うための搬送機構と、を備え、
前記第1の成膜部は、前記基板を載置する載置台と、当該載置台に載置された前記基板に重合用の液体を基板に供給する原料吐出部と、を含むことを特徴とする基板処理装置。 - 前記第1の成膜部は、イソシアネートを液体として基板に供給するイソシアネート用の原料吐出部と、アミンを液体として基板に供給するアミン用の原料吐出部と、を備えたことを特徴とする請求項8記載の基板処理装置。
- 尿素結合を有する重合体からなる第1のマスク用の膜と、当該第1のマスク用の膜上に積層された第2のマスク用の無機膜とが形成され、前記第1のマスク用の膜及び前記第2のマスク用の膜にマスクパターンが各々形成された基板に、真空雰囲気でイオンを注入するイオン注入モジュールと、
前記イオン注入後に真空雰囲気で前記第2のマスク用の膜を除去するためのエッチングガスを前記基板に供給するエッチング処理モジュールと、
前記イオン注入後に真空雰囲気で前記基板を加熱して前記重合体を解重合して前記第1のマスク用の膜を除去する除去モジュールと、
を含むことを特徴とする真空処理装置。 - 前記イオン注入モジュールを構成する第1の真空容器は、前記エッチング処理モジュール及び除去モジュールのうちの少なくとも一方を構成する第2の真空容器とは別個のものであり、
前記第1の真空容器と、前記第2の真空容器との間で基板を搬送する搬送機構を備えたことを特徴とする請求項10記載の真空処理装置。
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