JP6985803B2 - 露光装置、基板処理装置、基板の露光方法および基板処理方法 - Google Patents
露光装置、基板処理装置、基板の露光方法および基板処理方法 Download PDFInfo
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Description
(1)露光装置の構成
以下、本発明の第1の実施の形態に係る露光装置、基板処理装置、露光方法および基板処理方法について図面を用いて説明する。以下の説明において、基板とは、半導体基板、液晶表示装置用基板、プラズマディスプレイ用基板、光ディスク用基板、磁気ディスク用基板、光磁気ディスク用基板またはフォトマスク用基板等をいう。
図1の露光装置100においては、光源部163から基板Wに真空紫外線が照射されることにより露光処理が行われる。しかしながら、筐体121内の酸素濃度が高い場合、酸素分子が真空紫外線を吸収して酸素原子に分離するとともに、分離した酸素原子が他の酸素分子と再結合することによりオゾンが発生する。この場合、基板Wに到達する真空紫外線が減衰する。真空紫外線の減衰は、約230nmよりも長い波長の紫外線の減衰に比べて大きい。
図7は、図1の制御部110の構成を示す機能ブロック図である。図7に示すように、制御部110は、閉塞制御部1、昇降制御部2、排気制御部3、給気制御部4、濃度取得部5、濃度比較部6、遮光制御部7、照度取得部8、照度補間部9、露光量算出部10、露光量比較部11および投光制御部12を含む。
図8〜図11は、露光装置100の動作を説明するための模式図である。図8〜図11においては、筐体121内およびハウジング161内の構成の理解を容易にするために、一部の構成要素の図示が省略されるとともに、筐体121およびハウジング161の輪郭が一点鎖線で示される。図12、図13および図14は、図7の制御部110により行われる露光処理の一例を示すフローチャートである。以下、図8〜図11を参照しながら制御部110による露光処理を説明する。
図15は、図1の露光装置100を備えた基板処理装置の全体構成を示す模式的ブロック図である。以下に説明する基板処理装置200においては、ブロック共重合体の誘導自己組織化(DSA)を利用した処理が行われる。具体的には、基板Wの被処理面上に誘導自己組織化材料を含む処理液が塗布される。その後、誘導自己組織化材料に生じるミクロ相分離により基板Wの被処理面上に2種類の重合体のパターンが形成される。2種類の重合体のうち一方のパターンが溶剤により除去される。
本実施の形態に係る露光装置100においては、酸素濃度計181により計測される処理室120内の酸素濃度が露光開始濃度まで低下した時点で、光源部163による基板Wへの真空紫外線の照射が開始される。ここで、露光開始濃度は、1%よりも高くかつ大気中の酸素濃度よりも低く、真空紫外線の照射により酸素原子から生成されるオゾンが基板Wの被処理面の膜に損傷を与えないように予め定められる。
第2の実施の形態に係る露光装置および基板処理装置について、第1の実施の形態に係る露光装置および基板処理装置と異なる点を説明する。図17は、本発明の第2の実施の形態における露光装置の断面斜視図である。図18は、図17の露光装置100の縦断面図である。図17および図18においては、露光装置100の内部構成の理解を容易にするため、一部の構成要素の図示を省略している。
第3の実施の形態に係る露光装置および基板処理装置について、第1の実施の形態に係る露光装置および基板処理装置と異なる点を説明する。図19は、本発明の第3の実施の形態における露光装置の断面斜視図である。図20は、図19の露光装置100の縦断面図である。図19および図20においては、露光装置100の内部構成の理解を容易にするため、一部の構成要素の図示を省略している。
(1)第1〜第3の実施の形態において、処理液としてDSA液が用いられるが、本発明はこれに限定されない。DSA液とは異なる他の処理液が用いられてもよい。
以下、請求項の各構成要素と実施の形態の各構成要素との対応の例について説明するが、本発明は下記の例に限定されない。
Claims (16)
- 被処理面に膜が形成された基板を収容する処理室と、
前記処理室に収容された基板に真空紫外線を照射可能に設けられた光源部と、
前記処理室内の雰囲気を排気する排気部と、
前記処理室内の酸素濃度を計測する酸素濃度計と、
前記光源部から基板への真空紫外線の照射期間に、真空紫外線の一部を受光し、受光した真空紫外線の照度を計測する照度計と、
前記照度計により計測される照度に基づいて基板の露光量を算出する露光量算出部と、
前記酸素濃度計により計測される酸素濃度が予め定められた露光開始濃度まで低下した時点で前記光源部による基板への真空紫外線の照射を開始し、前記露光量算出部により算出される露光量が予め定められた設定露光量まで上昇した時点で前記光源部による基板への真空紫外線の照射を停止するように前記光源部を制御する光源制御部とを備え、
前記露光開始濃度は、体積比で1%よりも高くかつ大気中の酸素濃度よりも低く、真空紫外線の照射により酸素原子から生成されるオゾンが基板の被処理面の膜に損傷を与えないように予め定められる、露光装置。 - 前記処理室内に不活性ガスを供給する給気部をさらに備える、請求項1記載の露光装置。
- 前記光源部の下方に設けられ、基板が載置される載置部と、
前記処理室内と外部との間での基板の受け渡しの際に前記載置部が第1の位置に移動し、前記光源部から基板への真空紫外線の照射期間前または照射期間中に前記載置部が前記第1の位置の上方の第2の位置に移動するように前記載置部を制御する載置制御部とをさらに備える、請求項1または2記載の露光装置。 - 前記載置制御部は、前記第1の位置において前記載置部に基板が載置された後、前記光源部から基板への真空紫外線の照射開始後に前記第1の位置から前記第2の位置へ移動を開始するように前記載置部を制御する、請求項3記載の露光装置。
- 前記載置制御部は、前記第1の位置において前記載置部に基板が載置された後、前記光源部から基板への真空紫外線の照射開始前に前記第1の位置から前記第2の位置へ移動を開始するように前記載置部を制御する、請求項3記載の露光装置。
- 前記載置制御部は、前記第2の位置において前記載置部に載置された基板に真空紫外線が照射された後、前記露光量算出部により算出される露光量が前記設定露光量まで上昇する前に前記第2の位置から前記第1の位置へ移動を開始するように前記載置部を制御する、請求項3〜5のいずれか一項に記載の露光装置。
- 前記照度計は、真空紫外線を受光する受光面を有し、前記受光面が真空紫外線の照射期間における基板の被処理面を基準とする一定の高さに位置するように配置される、請求項3〜6のいずれか一項に記載の露光装置。
- 前記照度計は、前記受光面が真空紫外線の照射期間における基板の被処理面と同一の高さに位置するように配置される、請求項7記載の露光装置。
- 前記照度計は、前記載置部の移動に追従して上下方向に移動する、請求項3〜8のいずれか一項に記載の露光装置。
- 前記照度計は、前記載置部に取り付けられる、請求項9記載の露光装置。
- 前記光源部は、面状の断面を有する真空紫外線を出射するように構成される、請求項1〜10のいずれか一項に記載の露光装置。
- 前記光源部による真空紫外線の出射面積は、基板の面積よりも大きい、請求項11記載の露光装置。
- 基板に処理液を塗布することにより基板に膜を形成する塗布処理部と、
前記塗布処理部により膜が形成された基板を熱処理する熱処理部と、
前記熱処理部により熱処理された基板を露光する請求項1〜12のいずれか一項に記載の露光装置と、
前記露光装置により露光された基板に溶剤を供給することにより基板の膜を現像する現像処理部とを備える、基板処理装置。 - 処理液は、誘導自己組織化材料を含む、請求項13記載の基板処理装置。
- 被処理面に膜が形成された基板を処理室内に収容するステップと、
前記処理室内の雰囲気を排気部により排気するステップと、
前記処理室内の酸素濃度を酸素濃度計により計測するステップと、
前記酸素濃度計により計測される酸素濃度が予め定められた露光開始濃度まで低下した時点で、光源部による基板への真空紫外線の照射を開始するステップと、
前記光源部から基板への真空紫外線の照射期間に、照度計により真空紫外線の一部を受光し、受光した真空紫外線の照度を計測するステップと、
前記照度計により計測される照度に基づいて基板の露光量を算出するステップと、
前記算出される露光量が予め定められた設定露光量まで上昇した時点で前記光源部による基板への真空紫外線の照射を停止するステップとを含み、
前記露光開始濃度は、体積比で1%よりも高くかつ大気中の酸素濃度よりも低く、真空紫外線の照射により酸素原子から生成されるオゾンが基板の被処理面の膜に損傷を与えないように予め定められる、露光方法。 - 塗布処理部により基板の被処理面に処理液を塗布することにより基板に膜を形成するステップと、
前記塗布処理部により膜が形成された基板を熱処理部により熱処理するステップと、
前記熱処理部により熱処理された基板を露光装置により露光する請求項15記載の露光方法と、
前記露光装置により露光された基板の被処理面に現像処理部により溶剤を供給することにより基板の膜を現像するステップとを含む、基板処理方法。
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