JP2020113589A - 基板処理方法および基板処理装置 - Google Patents
基板処理方法および基板処理装置 Download PDFInfo
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- JP2020113589A JP2020113589A JP2019001564A JP2019001564A JP2020113589A JP 2020113589 A JP2020113589 A JP 2020113589A JP 2019001564 A JP2019001564 A JP 2019001564A JP 2019001564 A JP2019001564 A JP 2019001564A JP 2020113589 A JP2020113589 A JP 2020113589A
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Abstract
Description
まず、実施形態に係る基板処理システムの構成について説明する。図1は、実施形態に係る基板処理システムの構成を示す図である。また、図2は、実施形態に係るウェハの構成を示す図である。なお、以下においては、位置関係を明確にするために、互いに直交するX軸、Y軸およびZ軸を規定し、Z軸正方向を鉛直上向き方向とする。
図2に示すように、実施形態に係るウェハWは、シリコンウェハもしくは化合物半導体ウェハ等であり、表面には第1材料M1と第2材料M2とが露出している。
次に、基板処理装置14の構成例について図4を参照して説明する。図4は、実施形態に係る基板処理装置14の構成を示す図である。
次に、基板処理装置14の具体的動作について図5〜図9を参照して説明する。図5は、実施形態に係る基板処理システム1が実行する処理の手順を示すフローチャートである。図6は、実施形態に係るトッププレート41およびノズル51の配置の例を示す図である。図7は、成膜処理後のウェハWの一例を示す図であり、図8は、エッチング処理後のウェハWの一例を示す図であり、図9は、膜除去処理後のウェハWの一例を示す図である。基板処理システム1が備える各装置は、制御部15の制御に従って図5に示す各処理手順を実行する。
上述した実施形態では、膜形成材料を液体の状態でウェハWに供給することとした。これに限らず、膜形成材料は、気体の状態でウェハWに供給されてもよい。この場合の変形例について図10を参照して説明する。図10は、第1変形例に係る処理流体供給部の構成を示す図である。
図11は、第2変形例に係る脱酸素雰囲気維持部の構成を示す図である。図11に示すように、第2変形例に係る基板処理装置14Bは、脱酸素雰囲気維持部40Bを備える。脱酸素雰囲気維持部40Bは、トッププレート41Bを備えており、トッププレート41Bの中央部には、処理流体供給部50が備えるノズル51が挿通される開口部411Bが設けられる。
図12は、第3変形例に係る脱酸素雰囲気維持部の構成を示す図である。図12に示すように、第3変形例に係る基板処理装置14Cは、脱酸素雰囲気維持部40Cを備える。脱酸素雰囲気維持部40Cは、トッププレート41Cを備える。トッププレート41Cの中央部には、処理流体供給部50が備えるノズル51が挿通される開口部411Cが設けられる。
図13は、第4変形例に係る基板処理装置の構成を示す図である。図13に示すように、第4変形例に係る基板処理装置14Dは、UV照射部90を備える。UV照射部90は、駆動部92に接続されており、駆動部92によってウェハWの表面と対向する処理位置と、ウェハW外方の待避位置との間で移動可能である。かかるUV照射部90は、処理位置において、ウェハWの表面の略全面に紫外線を照射する。
上述した実施形態では、脱酸素雰囲気維持部40,40B,40Cを用いて脱酸素雰囲気を局所的に形成することとした。これに限らず、基板処理装置は、たとえば、FFU21から窒素等の不活性ガスを供給することにより、チャンバ20内全体に脱酸素雰囲気を形成してもよい。
P 反応生成物
M1 第1材料
M2 第2材料
1 基板処理システム
14 基板処理装置
15 制御部
20 チャンバ
30 基板保持機構
40 脱酸素雰囲気維持部
41 トッププレート
50 処理流体供給部
51 ノズル
Claims (20)
- 金属である第1材料と前記第1材料以外の材料である第2材料とが表面に露出した基板の少なくとも前記表面に接する雰囲気を脱酸素雰囲気に維持する維持工程と、
前記維持工程により前記脱酸素雰囲気に維持された状態において、前記基板の表面に対し、前記第1材料および前記第2材料のうち前記第1材料に対して選択的に膜を形成する膜形成材料を供給する供給工程と、
前記供給工程により前記第1材料の表面に前記膜が形成された状態で、前記第2材料の表面処理を行う表面処理工程と、
前記表面処理工程後、前記第1材料の表面から前記膜を除去する除去工程と
を含む、基板処理方法。 - 前記金属は、
金、銀、銅、白金、パラジウム、鉄、ニッケル、亜鉛、コバルトおよびルテニウムの少なくとも1つを含み、
前記膜形成材料は、
硫黄原子を含有する、請求項1に記載の基板処理方法。 - 前記膜形成材料は、
硫黄原子を含有し、かつ、脱酸素された液体または気体である、請求項2に記載の基板処理方法。 - 前記供給工程前に、前記維持工程により前記脱酸素雰囲気に維持された状態において、前記第1材料の表面から酸化膜を除去する酸化膜除去工程
を含む、請求項1〜3のいずれか一つに記載の基板処理方法。 - 前記酸化膜除去工程は、
脱酸素された薬液を供給する薬液供給工程と、
脱酸素されたリンス液を供給するリンス工程と
を含む、請求項4に記載の基板処理方法。 - 前記酸化膜除去工程前に、前記第1材料の表面から有機物を除去する有機物除去工程
を含む、請求項4または5に記載の基板処理方法。 - 前記除去工程は、
還元剤を用いて前記第1材料の表面から前記膜を除去する、請求項1〜6のいずれか一つに記載の基板処理方法。 - 前記除去工程は、
前記膜に対して紫外線を照射することによって前記第1材料の表面から前記膜を除去する、請求項1〜6のいずれか一つに記載の基板処理方法。 - 前記除去工程後、前記第1材料の表面にエッチング液を供給することによって前記第1材料の表面に残る前記膜を除去する残渣除去工程
を含む、請求項7または8に記載の基板処理方法。 - 前記供給工程は、
前記基板の表面および前記膜形成材料の少なくとも一方を加熱した状態で行われる、請求項1〜9のいずれか一つに記載の基板処理方法。 - 前記金属は、タングステンを含み、
前記膜形成材料は、Si−N結合を有する分子を含有する液体または気体である、請求項2に記載の基板処理方法。 - 前記第1材料の表面に形成される前記膜は、メッキにより形成される金属膜である、請求項2に記載の基板処理方法。
- 金属である第1材料と前記第1材料以外の材料である第2材料とが表面に露出した基板の少なくとも前記表面が接する雰囲気を脱酸素雰囲気に維持する維持部と、
前記維持部により前記脱酸素雰囲気に維持された状態において、前記基板の表面に対し、前記第1材料および前記第2材料のうち前記第1材料に対して選択的に膜を形成する膜形成材料を供給する供給部と、
前記供給部により前記第1材料の表面に前記膜が形成された状態で、前記第2材料の表面処理を行う表面処理部と、
前記表面処理後、前記第1材料の表面から前記膜を除去する除去部と
を備える、基板処理装置。 - 前記維持部は、
前記基板の表面を覆う大きさに形成されたトッププレートと、
前記基板の表面に近接して前記基板の表面と対向する処理位置に前記トッププレートを移動させる駆動部と
を含み、
前記供給部は、
前記処理位置に配置された前記トッププレートと前記基板の表面との間の空間に対して前記膜形成材料を供給する、請求項13に記載の基板処理装置。 - 前記トッププレートは、
温度調節部を備える、請求項14に記載の基板処理装置。 - 前記供給部は、
液体状の前記膜形成材料を供給し、
前記処理位置は、
前記トッププレートの下面が前記供給部から供給された液体状の前記膜形成材料に接触する位置である、請求項14または15に記載の基板処理装置。 - 前記供給部は、
液体状の前記膜形成材料を供給し続けることにより、前記トッププレートと前記基板の表面との間の空間に滞留する前記膜形成材料を排出する、請求項16に記載の基板処理装置。 - 前記駆動部は、
液体状の前記膜形成材料の供給が終了した後、前記トッププレートを前記基板の上方から待避させた待避位置に移動させる、請求項16または17に記載の基板処理装置。 - 前記トッププレートは、
中央部から外周部に向かって下り傾斜する下面を有する、請求項16〜18のいずれか一つに記載の基板処理装置。 - 前記トッププレートは、
不活性ガスを吐出する複数の吐出口を備える、請求項14または15に記載の基板処理装置。
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