JP2021034390A - 基板処理システムにおける搬送方法 - Google Patents
基板処理システムにおける搬送方法 Download PDFInfo
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
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Abstract
【解決手段】本開示の基板処理システムにおける搬送方法は、トレイ搬入工程と、測定工程と、調節工程と、基板載置工程と、トレイ搬出工程とを有する。トレイ搬入工程では、半導体基板とエッジリングとを載置可能なトレイを、載置台が設けられた載置室に搬入する。測定工程では、トレイに載置されたエッジリングの位置を測定してエッジリングの位置情報を取得する。調節工程では、取得された位置情報に基づき、半導体基板の位置を調節する。基板載置工程では、位置調節後の半導体基板をトレイに載置する。トレイ搬出工程では、半導体基板及びエッジリングが載置されたトレイを前記載置室から搬出する。
【選択図】図1
Description
図1は、基板処理システムの構成例を示す図である。
図2は、プロセスモジュールの構成例を示す図である。図2に示すプロセスモジュール4は、容量結合型の平行平板基板処理装置として構成されている。
図3は、トレイの形状の一例を示す図であり、図4は、トレイに載置されたエッジリングの形状の一例を示す図であり、図5は、トレイに載置されたエッジリング及びウエハの形状の一例を示す図である。
図6は、載置装置の構成例を示す図である。本実施形態では、図6に示すような載置装置12Aが、ロードロック室12として用いられる。図6において、載置装置12Aは、容器201と、回転角度センサ202と、水平位置センサ203と、載置台204と、第1のリフトピン205と、第2のリフトピン206と、第3のリフトピン207と、直流電源208と、スイッチ209とを有する。回転角度センサ202は、容器201の上壁に設置され、水平位置センサ203は、容器201の側壁に設置される。載置台204は、導電性の容器201に収容されている。また、載置装置12Aは、第1のリフトピン205を昇降させる第1の昇降機構(図示せず)と、第2のリフトピン206を第1のリフトピン205とは独立して昇降させる第2の昇降機構(図示せず)と、第3のリフトピン207を第1のリフトピン205及び第2のリフトピン206とは独立して昇降させる第3の昇降機構(図示せず)とを有する。第1のリフトピン205、第2のリフトピン206及び第3のリフトピン207は、導電材(例えばNi,Al等)からなる。第1のリフトピン205には、スイッチ209を介して直流電源208が接続される。第2のリフトピン206及び第3のリフトピン207は接地される。また、載置装置12Aには、容器201内を大気圧より低い圧力にすることが可能な排気機構としての真空ポンプ(図示せず)、及び、容器201内の圧力を大気圧に戻すためのリーク弁(図示せず)が設けられている。
図7は、搬送方法の処理手順の一例を示すフローチャートである。図8〜図11は、搬送方法の一例を示す図である。
ステップS10によりプロセスモジュール4へ搬入されたトレイTR1は、静電チャック40の上に載置される。このため、ウエハWは静電チャック40に直接載置されず、トレイTR1を介して載置されることになる。図12は、プロセスモジュールの静電チャックにおける単位面積当たりの静電容量と単位面積当たりの吸引力との関係を示すグラフである。例えば、静電チャックに内蔵された電極より上方の誘電層の厚さを0.3mm、トレイ本体101の上面の誘電体膜102及びトレイ本体101の下面の誘電体膜102の厚さをそれぞれ0.1mm、各誘電体の比誘電率を8.5とした場合、トレイTR1の静電容量は0.124μF/m2となる。この場合に、直流電源42より静電チャック40へ5kVの直流電圧を印加すると、静電チャック40において、単位面積当たり約170Torrの吸引力を有するクーロン力が得られる。よって、プロセスモジュール4において静電チャック40に載置されたトレイTR1とウエハWとの間に伝熱ガスが供給された場合でも、伝熱ガスの圧力によりウエハWが離間してしまわないような十分な強さの吸引力を得ることができる。
図13は、回転角度センサと水平位置センサとの位置関係を示す図である。図13に示すように、載置装置12Aにおいて、エッジリングERは、フラット部FLが回転角度センサ202の下方に位置するように、トレイTR1に載置される。また、載置装置12Aにおいて、トレイTR1に載置されたエッジリングERの周囲3箇所に、水平位置センサ203が設置されている。
半導体基板が載置されるトレイであって、
前記半導体基板が載置される基板載置部と、
前記基板載置部の周囲に設けられ、かつ、エッジリングが載置されるエッジリング載置部と、を有し、
前記基板載置部および前記エッジリング載置部は、
導電性のトレイ本体と、
前記トレイ本体の少なくとも上面に形成された誘電体膜と、を有する、
トレイ。
前記エッジリング載置部が前記基板載置部より低い位置に形成される、
付記1に記載のトレイ。
前記基板載置部の面積は、前記半導体基板の面積よりも小さい、
付記2に記載のトレイ。
前記基板載置部と前記エッジリング載置部とが同一平面上に形成される、
付記1に記載のトレイ。
前記基板載置部と前記エッジリング載置部との間に保護部材が設けられる、
付記4に記載のトレイ。
前記保護部材は、前記基板載置部と前記エッジリング載置部との間に設けられた溝に収容される、
付記5に記載のトレイ。
前記基板載置部は、
前記半導体基板の裏面を支持する支持面と、
前記トレイ本体及び前記誘電体膜を貫通する貫通孔と、を有する、
付記1に記載のトレイ。
前記トレイ本体を水平方向に電気的に分離する絶縁層、をさらに有する、
付記1に記載のトレイ。
載置台と、
前記載置台に載置されるトレイを昇降させる第1のリフトピンと、
前記トレイに載置される半導体基板を昇降させる第2のリフトピンと、
前記第1のリフトピンを昇降させる第1の昇降機構と、
前記第2のリフトピンを前記第1のリフトピンとは独立して昇降させる第2の昇降機構と、
前記トレイに電圧を印加する電圧印加部と、
を有する載置装置。
前記電圧印加部は、前記載置台に接続された直流電源である、
付記9に記載の載置装置。
前記載置台は、前記トレイと前記載置台とを電気的に接触させる導通端子を有する、
付記9に記載の載置装置。
前記電圧印加部は、前記第1のリフトピンに接続された第1の直流電源である、
付記9に記載の載置装置。
前記第2のリフトピンは接地されている、
付記9に記載の載置装置。
前記第1のリフトピンは、
第1ピンと、
第2ピンと、
前記第1ピンと前記第2ピンとを接続する絶縁性の支持部と、を含み、
前記第1の直流電源は前記第1ピンに接続され、
前記第2ピンに接続された第2の直流電源をさらに有する、
付記12に記載の載置装置。
前記トレイに載置されるエッジリングを昇降させる第3のリフトピンをさらに有する、
付記9に記載の載置装置。
前記第3のリフトピンは接地されている、
付記15に記載の載置装置。
前記載置台を収容する容器と、
前記容器内を大気圧より低い圧力にすることが可能な排気機構と、をさらに有する、
付記9に記載の載置装置。
前記載置台に接続されたRF電源をさらに有する、
付記9に記載の載置装置。
2 エッジリングストッカー
3 アライナー
4 プロセスモジュール
5 トレイストッカー
11 大気搬送室
12 ロードロック室
13 真空搬送室
14 FOUP
15 第1の搬送機構
16 第2の搬送機構
Claims (18)
- 基板処理システムにおける搬送方法であって、
半導体基板とエッジリングとを載置可能なトレイを、載置台が設けられた載置室に搬入するトレイ搬入工程と、
前記トレイに載置された前記エッジリングの位置を測定して前記エッジリングの位置情報を取得する測定工程と、
前記位置情報に基づき、前記半導体基板の位置を調節する調節工程と、
位置調節後の前記半導体基板を前記トレイに載置する基板載置工程と、
前記半導体基板及び前記エッジリングが載置された前記トレイを前記載置室から搬出するトレイ搬出工程と、
を有する搬送方法。 - 前記トレイは、導電性のトレイ本体と、前記トレイ本体の少なくとも上面に形成された誘電体膜とを有し、
前記基板載置工程と前記トレイ搬出工程との間に、前記トレイ本体に電圧を印加することにより前記半導体基板を前記トレイに静電吸着させる吸着工程、をさらに有する、
請求項1に記載の搬送方法。 - 前記吸着工程における前記電圧の印加は、前記トレイを前記載置台に載置する第1のリフトピンを介して行われる、
請求項2に記載の搬送方法。 - 前記吸着工程は、
前記第1のリフトピンを前記トレイ本体の裏面に接触させる接触工程と、
前記第1のリフトピンに電圧を印加する電圧印加工程と、を含む、
請求項3に記載の搬送方法。 - 前記吸着工程は、前記載置台に接続されたRF電源によりプラズマを生成するプラズマ生成工程、を含む、
請求項2に記載の搬送方法。 - 前記吸着工程における前記電圧の印加は、前記載置台に設けられた導通端子を介して行われる、
請求項2に記載の搬送方法。 - 前記載置室は、第1の搬送機構が設けられた大気搬送室に接続される、
請求項1に記載の搬送方法。 - 前記位置情報は、前記エッジリングの回転角度情報と、前記エッジリングの水平位置情報とを含む、
請求項1に記載の搬送方法。 - 前記半導体基板を第1の搬送機構により前記載置台の上方に搬送する基板搬送工程、をさらに有し、
前記基板搬送工程の前に実施される前記調節工程において、前記回転角度情報に基づき前記半導体基板を回転させる、
請求項8に記載の搬送方法。 - 前記半導体基板を第1の搬送機構により前記載置台の上方に搬送する基板搬送工程、をさらに有し、
前記基板搬送工程の前に実施される前記調節工程において、前記水平位置情報に基づき前記半導体基板の水平位置を調節する、
請求項8に記載の搬送方法。 - 前記半導体基板を第1の搬送機構により前記載置台の上方に搬送する基板搬送工程、をさらに有し、
前記基板搬送工程において、前記水平位置情報に基づき、前記半導体基板を前記第1の搬送機構により前記載置台の上方に搬送する、
請求項8に記載の搬送方法。 - 前記基板載置工程は、
第2のリフトピンを上昇させることにより前記半導体基板を前記第1の搬送機構から離間させる基板リフトアップ工程と、
前記第2のリフトピンを下降させることにより前記半導体基板を前記トレイに載置する基板リフトダウン工程と、を含む、
請求項7に記載の搬送方法。 - 前記第2のリフトピンは接地されており、前記基板リフトアップ工程において前記半導体基板の除電が行われる、
請求項12に記載の搬送方法。 - 前記トレイ搬入工程において、前記トレイは前記第1の搬送機構により前記載置室内に搬入される、
請求項7に記載の搬送方法。 - 前記載置室は、前記大気搬送室、及び、第2の搬送機構が設けられた真空搬送室に接続されたロードロック室である、
請求項7に記載の搬送方法。 - 前記トレイ搬入工程において、前記トレイは前記第2の搬送機構により前記載置室内に搬入される、
請求項15に記載の搬送方法。 - 前記トレイ搬入工程において前記載置室に搬入される前記トレイには、前記エッジリングが載置されている、
請求項1に記載の搬送方法。 - 前記トレイ搬入工程と前記測定工程との間に、前記トレイに前記エッジリングを載置するエッジリング載置工程、をさらに有する、
請求項1に記載の搬送方法。
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