JP6869093B2 - 基板処理装置及び基板処理方法 - Google Patents
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Description
すなわち、従来の装置は、乾燥ガスの流量を切り換えるマスフローコントローラの応答性が悪いので、乾燥ガスを大流量に切り換えるのに数秒(1から2秒)程度の遅れが存在する。そのため、乾燥処理の時間を短縮することが困難であるという問題がある。さらに、基板が回転している関係上、中心側が負圧になるので、乾燥ガスの流量切り換え時に生じるその遅れにより、乾燥処理時に周囲のパーティクルが基板の中心側に巻き込まれて基板の下面の清浄度が低下するという問題がある。
すなわち、請求項1に記載の発明は、基板の下面を処理液で覆った状態で、その上面を処理する基板処理装置において、鉛直軸周りに回転可能な回転台と、前記回転台を回転させる回転駆動手段と、前記回転台に立設され、基板の周縁部と当接して、基板の下面を前記回転台の上面から離間して支持する支持手段と、前記支持手段で支持された基板の上面に作用して処理を行う処理手段と、基板の下面に処理液を供給する処理液供給手段と、前記回転台の中央から前記基板の下面に気体を供給する気体ノズルと、一端側が前記気体ノズルに連通接続された気体供給管と、気体を供給する気体供給手段と、一端側が前記気体供給手段に連通接続され、他端側が前記気体供給管の他端側に連通接続された第1の分岐配管と、一端側が前記気体供給手段に連通接続され、他端側が前記気体供給管の他端側に連通接続された第2の分岐配管と、前記第1の分岐配管における気体の流通を第1の流量に制御する第1の制御弁と、前記第2の分岐配管における気体の流通を、前記第1の流量以上の流量である第2の流量に制御する第2の制御弁と、前記処理手段で基板の上面を処理する上面処理の際には、前記回転駆動手段を操作して基板を第1の回転数で回転させつつ前記処理液供給手段から処理液を供給させ、前記第1の制御弁を操作して前記気体ノズルから第1の流量で気体を供給させ、前記上面処理が終了した後、前記回転駆動手段の回転数を上昇させて第2の回転数で基板を回転させて基板を乾燥させる乾燥処理の際には、前記第1の制御弁及び前記第2の制御弁を操作して、前記気体ノズルから前記第1の流量より大流量で気体を供給させる制御手段と、を備え、前記第1の制御弁及び第2の制御弁は、同等または異なる所望の流量に調整可能であることを特徴とするものである。
図1は、実施例に係る基板処理装置の全体構成を示した縦断面図であり、図2は、スピンチャックの平面図であり、図3は、気体ノズル及びその周辺を含む構成の縦断面図である。
1 … 基板処理装置
3 … 支持回転機構
5 … 飛散防止カップ
7 … 処理機構
9 … 処理液供給機構
11 … スピンチャック
13 … スピンベース
15 … 支持ピン
17 … 回転軸
19 … 電動モータ
57 … 気体供給管
58 … リンス液供給管
59 … 先端保持部
61 … 開口61
67 … 気体ノズル
69 … ベース部
71 … 整流部材
73 … 脚部
75 … 噴出口
h … 開口高さ
GS1 … 供給配管
GS … 不活性ガス供給源
GS3 … 第1の分岐配管
GS5 … 第2の分岐配管
GS7,GS9 … 制御弁
RS1 … 供給配管
RS3 … 開閉弁
111 … 制御部
Claims (8)
- 基板の下面を処理液で覆った状態で、その上面を処理する基板処理装置において、
鉛直軸周りに回転可能な回転台と、
前記回転台を回転させる回転駆動手段と、
前記回転台に立設され、基板の周縁部と当接して、基板の下面を前記回転台の上面から離間して支持する支持手段と、
前記支持手段で支持された基板の上面に作用して処理を行う処理手段と、
基板の下面に処理液を供給する処理液供給手段と、
前記回転台の中央から前記基板の下面に気体を供給する気体ノズルと、
一端側が前記気体ノズルに連通接続された気体供給管と、
気体を供給する気体供給手段と、
一端側が前記気体供給手段に連通接続され、他端側が前記気体供給管の他端側に連通接続された第1の分岐配管と、
一端側が前記気体供給手段に連通接続され、他端側が前記気体供給管の他端側に連通接続された第2の分岐配管と、
前記第1の分岐配管における気体の流通を第1の流量に制御する第1の制御弁と、
前記第2の分岐配管における気体の流通を、前記第1の流量以上の流量である第2の流量に制御する第2の制御弁と、
前記処理手段で基板の上面を処理する上面処理の際には、前記回転駆動手段を操作して基板を第1の回転数で回転させつつ前記処理液供給手段から処理液を供給させ、前記第1の制御弁を操作して前記気体ノズルから第1の流量で気体を供給させ、前記上面処理が終了した後、前記回転駆動手段の回転数を上昇させて第2の回転数で基板を回転させて基板を乾燥させる乾燥処理の際には、前記第1の制御弁及び前記第2の制御弁を操作して、前記気体ノズルから前記第1の流量より大流量で気体を供給させる制御手段と、
を備え、
前記第1の制御弁及び前記第2の制御弁は、同等または異なる所望の流量に調整可能であることを特徴とする基板処理装置。 - 請求項1に記載の基板処理装置において、
前記第2の流量は、前記第1の流量と同等以上であることを特徴とする基板処理装置。 - 請求項1または2に記載の基板処理装置において、
前記制御手段は、前記第1の制御弁を常時開放させていることを特徴とする基板処理装置。 - 請求項1または2に記載の基板処理装置において、
前記制御手段は、前記第1の制御弁及び前記第2の制御弁を操作する際に、前記第1の制御弁を開放させたまま前記第2の制御弁を開放させることを特徴とする基板処理装置。 - 請求項1から4のいずれかに記載の基板処理装置において、
前記制御手段は、前記第1の回転数から前記第2の回転数へ回転数を上げ始める時点から前記第2の回転数へ到達する時点の間に、前記気体ノズルから第2の流量以上で気体を供給させることを特徴とする基板処理装置。 - 請求項1から5のいずれかに記載の基板処理装置において、
前記気体ノズルは、平面視で、放射状に基板の周縁部に向けて気体を供給することを特徴とする基板処理装置。 - 請求項1から6のいずれかに記載の基板処理装置において、
前記気体ノズルは、気体を供給する開口高さが2mm以上であることを特徴とする基板処理装置。 - 基板の下面を処理液で覆った状態で、その上面を処理する基板処理方法において、
基板の周縁部を当接支持して基板の下面を回転台から離間させた状態で、前記回転台を第1の回転数で回転させ、基板の下面を処理液で覆った状態で、第1の制御弁を操作して前記回転台の中央の気体ノズルから基板の下面に第1の流量で気体を供給しつつ基板の上面を処理する上面処理過程と、
前記回転台を前記第1の回転数よりも高い第2の回転数で回転させ、第1の制御弁及び第2の制御弁を操作して気体ノズルから前記第1の流量より大流量で気体を供給させる乾燥処理過程と、
をその順に実施し、
前記第1の制御弁及び前記第2の制御弁は、同等または異なる所望の流量に調整可能であることを特徴とする基板処理方法。
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