JP2019184681A - 露光装置及び物品の製造方法 - Google Patents
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Abstract
Description
図1は、本発明の一側面としての露光装置1の構成を示す概略図である。露光装置1は、半導体デバイスや液晶表示デバイスなどのデバイスの製造工程であるフォトリソグラフィー工程に用いられるリソグラフィ装置である。露光装置1は、基板上のレジスト膜(感光剤)に、投影光学系を介してマスクのパターンを投影して潜像(潜像パターン)を形成する露光処理を行う。露光装置1は、図1に示すように、照明光学系12と、マスクステージ14と、投影光学系15と、基板ステージ17と、マーク形成部18と、マーク計測部19と、制御部20とを有する。
図5に示すように、リワーク基板16Aには、AMFマーク31、32及び33のそれぞれの痕跡、即ち、マーク痕31’、32’及び33’が残っている。かかるマーク痕31’、32’及び33’は、マーク計測部19によって検出できる可能性がある。換言すれば、マーク痕31’、32’及び33’の位置を、マーク計測部19によって計測可能である場合がある。そこで、本実施形態では、マーク計測部19がリワーク基板16Aに残っているマーク痕31’、32’及び33’の位置を計測可能であるか否かに応じて、新たなAMFマーク41、42及び43を形成するか否かを決定する。
本実施形態では、図7に示すように、リワーク基板16Aに対して、露光装置1で1回目の露光処理を行い、露光装置1とは異なる他の露光装置1Aで2回目の露光処理を行う場合について説明する。ここで、露光装置1Aは、露光装置1と同等な構成及び機能を有する。
本発明の実施形態における物品の製造方法は、例えば、デバイス(半導体素子、磁気記憶媒体、液晶表示素子など)などの物品を製造するのに好適である。かかる製造方法は、露光装置1や露光装置1及び1Aを用いて、感光剤が塗布された基板を露光する工程と、露光された基板を現像する工程を含む。また、かかる製造方法は、他の周知の工程(酸化、成膜、蒸着、ドーピング、平坦化、エッチング、レジスト剥離、ダイシング、ボンディング、パッケージングなど)を含みうる。本実施形態における物品の製造方法は、従来に比べて、物品の性能、品質、生産性及び生産コストの少なくとも1つにおいて有利である。
本発明は、上述の実施形態の1つ以上の機能を実現するプログラムを、ネットワーク又は記憶媒体を介してシステム又は装置に供給し、そのシステム又は装置のコンピュータにおける1つ以上のプロセッサーがプログラムを読出し実行する処理でも実現可能である。また、1つ以上の機能を実現する回路(例えば、ASIC)によっても実現可能である。
Claims (13)
- 基板上のレジスト膜にマークを形成する形成部と、
前記形成部によって形成されたマークの位置を計測する計測部と、
前記計測部で計測されたマークの位置に基づいて、パターンを基板上のレジスト膜の目標位置に投影して潜像を形成する露光処理を行う制御部と、を有し、
前記制御部は、第1マークが形成された第1レジスト膜が除去され、第2レジスト膜が形成されたリワーク基板に対して前記露光処理を行う前に、前記リワーク基板における前記第1マークの位置からシフトした位置に第2マークが位置するように、前記第2レジスト膜に前記第2マークを形成する形成処理を前記形成部に行わせることを特徴とする露光装置。 - 前記制御部は、前記形成処理において、前記形成部によって前記第2レジスト膜に少なくとも3つの第2マークを形成することを特徴とする請求項1に記載の露光装置。
- 前記制御部は、前記第2レジスト膜に形成される前記少なくとも3つの第2マーク間の距離が予め定められた距離よりも大きくなるように、前記形成処理を行うことを特徴とする請求項2に記載の露光装置。
- 前記制御部は、前記形成処理において、前記形成部によって前記第2レジスト膜に、前記第1レジスト膜に形成されていた複数の第1マークの数と同じ数の複数の第2マークを形成することを特徴とする請求項1に記載の露光装置。
- 前記制御部は、前記第2レジスト膜に形成される前記複数の第2マーク間の相対距離が前記第1レジスト膜に形成されていた前記複数の第1マーク間の相対距離と同じになるように、前記形成処理を行うことを特徴とする請求項4に記載の露光装置。
- 前記制御部は、前記形成処理において、前記リワーク基板における前記第2マークの位置が前記第1マークの位置と重ならないように、前記形成部によって前記第2レジスト膜に前記第2マークを形成することを特徴とする請求項1乃至5のうちいずれか1項に記載の露光装置。
- 前記制御部は、前記形成処理において、前記第1レジスト膜に形成されていた前記第1マークの位置が前記計測部によって前記第2マークの位置を計測する際に前記計測部の計測範囲外に位置するように、前記形成部によって前記第2レジスト膜に前記第2マークを形成することを特徴とする請求項1乃至6のうちいずれか1項に記載の露光装置。
- 前記形成部は、前記潜像を形成するための光の波長とは異なる波長の光を用いて前記第2レジスト膜に前記第2マークを形成することを特徴とする請求項1乃至7のうちいずれか1項に記載の露光装置。
- 前記第1マークは、前記形成部によって前記第1レジスト膜に形成されることを特徴とする請求項1乃至7のうちいずれか1項に記載の露光装置。
- 前記第1マークは、前記露光装置とは異なる他の装置によって形成され、
前記制御部は、
前記他の装置から、前記第1レジスト膜に形成されていた前記第1マークの位置に関する位置情報を取得し、
前記形成処理において、前記位置情報に基づいて、前記形成部によって前記第2レジスト膜に前記第2マークを形成することを特徴とする請求項1乃至9のうちいずれか1項に記載の露光装置。 - 基板上のレジスト膜にマークを形成する形成部と、
前記形成部で形成されたマークの位置を計測する計測部と、
前記計測部で計測されたマークの位置に基づいて、パターンを基板上のレジスト膜の目標位置に投影して潜像を形成する露光処理を行う制御部と、を有し、
前記制御部は、
前記計測部が前記レジスト膜に形成されている第1マークの位置を計測可能であるか否かを判定し、
前記計測部が前記第1マークの位置を計測可能でない場合には、前記レジスト膜上の前記第1マークの位置からシフトした位置に第2マークを形成するように前記形成部を制御し、
前記計測部で計測された前記第2マークの位置に基づいて、前記露光処理を制御することを特徴とする露光装置。 - 前記第1マークは、前記形成部によって前記レジスト膜に形成されることを特徴とする請求項11に記載の露光装置。
- 請求項1乃至12のうちいずれか1項に記載の露光装置を用いて基板を露光する工程と、
露光した前記基板を現像する工程と、
現像された前記基板から物品を製造する工程と、
を有することを特徴とする物品の製造方法。
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