JP2018081281A - 露光装置、露光方法、および物品の製造方法 - Google Patents
露光装置、露光方法、および物品の製造方法 Download PDFInfo
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Abstract
Description
本発明に係る第1実施形態の露光装置10について、図1を参照しながら説明する。図1は、第1実施形態の露光装置10を示す概略図である。第1実施形態の露光装置10は、例えば、光源1と、照明光学系2と、マスクステージ3と、投影光学系4と、基板ステージ5と、計測部6と、制御部7とを含み得る。制御部7は、例えばCPUやメモリを有し、露光装置10の各部を制御する(基板9のショット領域を露光する動作を制御する)。また、本実施形態では、投影光学系4から射出された光の光軸と平行な方向をZ方向とし、当該光軸に垂直かつ互いに直交する2つの方向をX方向およびY方向とする。
本発明の実施形態にかかる物品の製造方法は、例えば、半導体デバイス等のマイクロデバイスや微細構造を有する素子等の物品を製造するのに好適である。本実施形態の物品の製造方法は、基板に塗布された感光剤に上記の露光装置を用いて潜像パターンを形成する工程(基板を露光する工程)と、かかる工程で潜像パターンが形成された基板を現像する工程とを含む。更に、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、パッケージング等)を含む。本実施形態の物品の製造方法は、従来の方法に比べて、物品の性能・品質・生産性・生産コストの少なくとも1つにおいて有利である。
Claims (11)
- 投影光学系を介して基板を露光する露光装置であって、
前記投影光学系からの光の光路領域内における複数の計測点で前記基板の高さを計測する計測部と、
前記計測部による計測結果に基づいて前記基板の高さおよび傾きの少なくとも一方を制御するとともに、前記基板のショット領域を露光位置に配置して当該ショット領域を露光する動作を制御する制御部と、
を含み、
前記ショット領域は、パターンを形成すべき複数の部分領域を含み、
前記制御部は、前記計測部に前記基板の高さを計測させるときに前記複数の部分領域に配置される計測点の数が、前記ショット領域を前記露光位置に配置したときに前記複数の部分領域に配置される計測点の数よりも多くなるように、前記露光位置からシフトした位置に前記ショット領域を配置して前記計測部に前記基板の高さを計測させる、ことを特徴とする露光装置。 - 前記複数の計測点は、基準計測点を含み、
前記基準計測点で計測された前記基板の高さは、前記複数の計測点の各々で計測された前記基板の高さの基準として用いられ、
前記制御部は、前記複数の計測点で前記基板の高さを計測するときに前記基準計測点が前記複数の部分領域のいずれかに配置されるように、前記露光位置からシフトした位置に前記ショット領域を配置して前記計測部に前記基板の高さを計測させる、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、前記複数の計測点で前記基板の高さを計測するときに前記複数の計測点のうちの2/3以上の計測点が前記複数の部分領域のいずれかに配置されるように、前記露光位置からシフトした位置に前記ショット領域を配置して前記計測部に前記基板の高さを計測させる、ことを特徴とする請求項1又は2に記載の露光装置。
- 前記制御部は、前記基板における前記複数の部分領域の配置を示す情報に基づいて、前記露光位置からシフトした位置に前記ショット領域を配置する、ことを特徴とする請求項1乃至3のうちいずれか1項に記載の露光装置。
- 前記制御部は、前記露光位置からシフトした位置に前記ショット領域を配置して前記計測部に前記基板の高さを計測させた後、前記ショット領域を前記露光位置に配置して前記ショット領域を露光する動作を制御する、ことを特徴とする請求項1乃至4のうちいずれか1項に記載の露光装置。
- 前記制御部は、前記基板における前記複数の部分領域の配置を示す情報に基づいて、前記露光位置からシフトした位置に前記ショット領域を配置したときに前記複数の部分領域に配置された計測点を前記複数の計測点から選択し、選択された計測点での計測結果に基づいて前記基板の高さおよび傾きの少なくとも一方を制御する、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。
- 前記複数の計測点は、前記光路領域内における配置が固定されている、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。
- 基板を保持して移動可能なステージを含み、
前記制御部は、前記ステージを移動させることにより、前記露光位置からシフトした位置に前記ショット領域を配置する、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。 - 前記基板は、複数の半導体チップがモールド材によって固定された基板を含み、
前記複数の部分領域の各々は、1つの半導体チップが配置された領域を含む、ことを特徴とする請求項1乃至8のうちいずれか1項に記載の露光装置。 - 請求項1乃至9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、
前記工程で露光された前記基板を現像する工程と、
を含むことを特徴とする物品の製造方法。 - 投影光学系を介して基板を露光する露光方法であって、
前記投影光学系からの光の光路領域内における複数の計測点で前記基板の高さを計測する計測工程と、
前記計測工程での計測結果に基づいて前記基板の高さおよび傾きの少なくとも一方を制御する制御工程と、
前記基板のショット領域を露光位置に配置して当該ショット領域を露光する露光工程と、
を含み、
前記ショット領域は、パターンを形成すべき複数の部分領域を含み、
前記計測工程では、前記基板の高さを計測するときに前記複数の部分領域に配置される計測点の数が、前記ショット領域を前記露光位置に配置したときに前記複数の部分領域に配置される計測点の数よりも多くなるように、前記露光位置からシフトした位置に前記ショット領域を配置する、ことを特徴とする露光方法。
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