JP7236985B2 - 温度計測システム、温度計測方法及び基板処理装置 - Google Patents
温度計測システム、温度計測方法及び基板処理装置 Download PDFInfo
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- JP7236985B2 JP7236985B2 JP2019206738A JP2019206738A JP7236985B2 JP 7236985 B2 JP7236985 B2 JP 7236985B2 JP 2019206738 A JP2019206738 A JP 2019206738A JP 2019206738 A JP2019206738 A JP 2019206738A JP 7236985 B2 JP7236985 B2 JP 7236985B2
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- H01J2237/332—Coating
Description
図1は、一実施形態の温度計測システム及びこれを用いた基板処理装置の構成図である。図2は図1の基板処理装置の内部構造の斜視図であり、図3は図1の基板処理装置の内部構造の上面図である。
判定部105は、温度算出部104が算出した複数の基板Wの温度差が予め定めた閾値内であるか否かを判定する。複数の基板Wの温度差は、例えば複数の基板Wの温度のうちの最大温度と最小温度との差であってよい。閾値は、予め管理者等により定められる。また、判定部105は、基板Wの温度の測定を終了する条件を満たしているか否かを判定する。例えば、制御部100は、厚さ算出部80による基板Wの光学厚さの算出を開始してから所定の時間が経過した場合に、基板Wの温度の測定を終了する条件を満たしていると判定する。また、判定部105は、予め定めた温度安定時間を経過したか否かを判定する。
図7は、一実施形態の温度計測システムによる温度計測方法の一例を示すフローチャートである。一実施形態の温度計測方法は、ステップS1~S13を含む。以下では、回転テーブル2の5つの凹部24のそれぞれに載置された基板Wの温度を計測する場合を例に挙げて説明する。
ステップS8では、制御部100は、ステップS7により算出された5枚の基板Wの温度差が予め定めた閾値内であるか否かを判定する。5枚の基板Wの温度差は、例えば5枚の基板Wの温度のうちの最大温度と最小温度との差であってよい。ステップS8において、5枚の基板Wの温度差が予め定めた閾値内であると判定した場合、制御部100は処理をステップS9へ進める。一方、ステップS8において、5枚の基板Wの温度差が予め定めた閾値内でないと判定した場合、制御部100は処理をステップS10へ進める。
2 回転テーブル
25 エンコーダ
80 厚さ算出部
100 制御部
102 基板特定部
103 格納部
104 温度算出部
105 判定部
106 出力部
W 基板
Claims (9)
- 回転テーブルの回転方向に沿って載置された複数の基板のいずれかの基板に測定光を照射して該測定光の反射光に基づいて前記基板の光学厚さを算出する厚さ算出部と、
前記回転テーブルの回転位置情報を検出する回転位置検出部と、
前記回転位置検出部が検出した前記回転位置情報に基づいて前記厚さ算出部が前記光学厚さを算出した基板を特定する基板特定部と、
基板ごとに対応付けされた温度と厚さとの関係を示す第1関係情報と、基板ごとに対応付けされた温度変化量と光学厚さの変化量との関係を示す第2関係情報と、を格納する格納部と、
前記厚さ算出部が算出した前記光学厚さと、前記基板特定部が特定した前記基板と、前記第1関係情報と、前記第2関係情報と、に基づいて、前記基板の温度を算出する温度算出部と、
を有する、温度計測システム。 - 前記厚さ算出部は、前記基板の表面と裏面からの反射光で生成される干渉スペクトルに基づいて前記基板の光学厚さを算出する、
請求項1に記載の温度計測システム。 - 前記回転位置検出部は、エンコーダを含む、
請求項1又は2に記載の温度計測システム。 - 前記回転テーブルは真空容器内に設けられ、前記厚さ算出部は前記真空容器の外部に前記回転テーブルと離間して設けられる、
請求項1乃至3のいずれか一項に記載の温度計測システム。 - 前記温度算出部により算出される複数の前記基板の温度差に基づいて警報を出力する出力部を更に有する、
請求項1乃至4のいずれか一項に記載の温度計測システム。 - 回転テーブルの回転方向に沿って複数の基板を載置するステップと、
前記複数の基板のいずれかの基板に測定光を照射して該測定光の反射光に基づいて前記基板の光学厚さを算出するステップと、
前記回転テーブルの回転位置情報を検出するステップと、
検出された前記回転位置情報に基づいて前記光学厚さを算出した基板を特定するステップと、
算出された前記光学厚さと、特定された前記基板と、該基板に対応付けされた温度と厚さとの関係を示す第1関係情報と、該基板に対応付けされた温度変化量と光学厚さの変化量との関係を示す第2関係情報と、に基づいて、前記基板の温度を算出するステップと、
を有する、温度計測方法。 - 前記光学厚さを算出するステップ、前記回転位置情報を検出するステップ、前記基板を特定するステップ及び前記基板の温度を算出するステップは、前記複数の基板のそれぞれに対して実行される、
請求項6に記載の温度計測方法。 - 算出される前記複数の基板の温度の温度差に基づいて警報を出力するステップを更に有する、
請求項7に記載の温度計測方法。 - 真空容器と、
前記真空容器内に回転可能に設けられ、回転方向に沿って複数の基板を載置する回転テーブルと、
前記複数の基板のいずれかの基板に測定光を照射して該測定光の反射光に基づいて前記基板の光学厚さを算出する厚さ算出部と、
前記回転テーブルの回転位置情報を検出する回転位置検出部と、
前記回転位置検出部が検出した前記回転位置情報に基づいて前記厚さ算出部が前記光学厚さを算出した基板を特定する基板特定部と、
基板ごとに対応付けされた温度と厚さとの関係を示す第1関係情報と、基板ごとに対応付けされた温度変化量と光学厚さの変化量との関係を示す第2関係情報と、を格納する格納部と、
前記厚さ算出部が算出した前記光学厚さと、前記基板特定部が特定した前記基板と、前記第1関係情報と、前記第2関係情報と、に基づいて、前記基板の温度を算出する温度算出部と、
を有する、基板処理装置。
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