JP6906490B2 - 基板処理装置、半導体装置の製造方法およびプログラム - Google Patents
基板処理装置、半導体装置の製造方法およびプログラム Download PDFInfo
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- JP6906490B2 JP6906490B2 JP2018172705A JP2018172705A JP6906490B2 JP 6906490 B2 JP6906490 B2 JP 6906490B2 JP 2018172705 A JP2018172705 A JP 2018172705A JP 2018172705 A JP2018172705 A JP 2018172705A JP 6906490 B2 JP6906490 B2 JP 6906490B2
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- gas supply
- reaction gas
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- plasma
- valve
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- 239000012495 reaction gas Substances 0.000 claims description 60
- 238000010926 purge Methods 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 37
- 239000011261 inert gas Substances 0.000 claims description 26
- 239000002994 raw material Substances 0.000 claims description 15
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- 238000003860 storage Methods 0.000 description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
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- 230000005540 biological transmission Effects 0.000 description 3
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- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 238000005192 partition Methods 0.000 description 1
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Description
基板処理装置200はチャンバ202を有する。チャンバ202は、例えば横断面が円形であり扁平な密閉容器として構成されている。また、チャンバ202は、例えばアルミニウム(Al)やステンレス(SUS)などの金属材料により構成されている。チャンバ202内には、基板としてのシリコンウエハ等の基板100を処理する処理空間205と、基板100を処理空間205に搬送する際に基板100が通過する搬送空間206とが形成されている。チャンバ202は、上部容器202aと下部容器202bで構成される。上部容器202aと下部容器202bの間には仕切り板208が設けられる。
シャワーヘッド230は、蓋231を有する。蓋231はフランジ232を有し、フランジ232は上部容器202a上に支持される。更に、蓋231は位置決め部233を有する。位置決め部233が上部容器202aに勘合されることで、蓋231が固定される。
蓋231には、原料ガスまたはパージガスが供給される第一ガス供給孔235と、反応ガスが供給される第二ガス供給孔236が設けられる。後述するように、反応ガスは原料ガスと反応するガスである。基板100のエッジに供給可能なよう、第二ガス供給孔236は径方向に複数設けられる。第二ガス供給孔236は反応ガス供給孔とも呼ぶ。
続いて、図2を用いて第一ガス供給部240の詳細を説明する。共通ガス供給管241には、第一ガス供給管243、パージガス供給管249が接続されている。
共通ガス供給管241には、第一ガス供給管243が接続される。第一ガス供給管243には、上流方向から順に、第一ガス供給源244、流量制御器(流量制御部)であるMFC245、及び開閉弁であるバルブ246が設けられている。
共通ガス供給管241と第一ガス供給管243の合流部247には、パージガス供給部248の一部であるパージガス供給管249の下流端が接続されている。パージガス供給管249には、上流方向から順に、パージガス供給源250、流量制御器(流量制御部)であるMFC251、及び開閉弁であるバルブ252が設けられている。
続いて図3を用いて、第二ガス供給部260を説明する。
それぞれの反応ガス供給管261には、上流方向から順に、反応ガス供給源262、流量制御器(流量制御部)であるMFC263、プラズマ生成部であるリモートプラズマユニット(RPU)265、バルブ266が設けられる。
図1に戻って説明する。処理室201の雰囲気を排気する排気部280は、処理空間205に連通する排気管281を有する。排気管281には、処理空間205内を所定の圧力に制御する圧力制御器であるAPC(AutoPressure Controller)282、処理空間205の圧力を計測する圧力検出部283が設けられる。APC282は開度調整可能な弁体(図示せず)を有し、後述するコントローラ400からの指示に応じて排気管281のコンダクタンスを調整する。また、排気管281においてAPC282の上流側にはバルブ284が設けられる。さらに、APC282の下流には、バイパス管273が接続される。排気管281とバルブ284、APC282、圧力検出部283をまとめて排気部280と呼ぶ。
基板処理装置200は、基板処理装置200の各部の動作を制御するコントローラ400を有している。コントローラ400は、図4に記載のように、演算部(CPU)401、一時記憶部402、記憶部403、送受信部404を少なくとも有する。コントローラ400は、送受信部404を介して基板処理装置200の各構成に接続され、上位コントローラや使用者の指示に応じて記憶部402からプログラムやレシピを呼び出し、その内容に応じて各構成の動作を制御する。なお、コントローラ400は、専用のコンピュータとして構成してもよいし、汎用のコンピュータとして構成してもよい。例えば、上述のプログラムを格納した外部記憶装置(例えば、磁気テープ、フレキシブルディスクやハードディスク等の磁気ディスク、CDやDVD等の光ディスク、MO等の光磁気ディスク、USBメモリ(USB Flash Drive)やメモリカード等の半導体メモリ)412を用意し、外部記憶装置412を用いて汎用のコンピュータにプログラムをインストールすることにより、本実施形態に係るコントローラ400を構成できる。また、コンピュータにプログラムを供給するための手段は、外部記憶装置412を介して供給する場合に限らない。例えば、インターネットや専用回線等の通信手段を用いても良いし、上位装置420から送受信部411を介して情報を受信し、外部記憶装置412を介さずにプログラムを供給するようにしてもよい。また、キーボードやタッチパネル等の入出力装置413を用いて、コントローラ400に指示をしても良い。
図5を用いて基板処理装置200を用いた基板処理工程について説明する。本基板処理工程を行うことで、基板上に薄膜を形成する。なお、以下の説明において、基板処理装置200を構成する各部の動作はコントローラ400により制御される。
プラズマ生成部調整工程を説明する。図5においては、本工程の説明を省略する。プラズマ生成部調整工程では、それぞれのRPU265に供給するパワーを、様々な制約に対応可能なよう調整する。
基板搬入工程を説明する。図5においては、本工程の説明を省略する。基板処理装置200では基板載置台212を基板100の搬送位置(搬送ポジション)まで下降させることにより、基板載置台212の貫通孔214にリフトピン207を貫通させる。その結果、リフトピン207が、基板載置台212表面よりも所定の高さ分だけ突出した状態となる。続いて、ゲートバルブ149を開いて搬送空間206を真空搬送室(図示せず)と連通させる。そして、この移載室からウエハ移載機(図示せず)を用いて基板100を搬送空間206に搬入し、リフトピン207上に基板100を移載する。これにより、基板100は、基板載置台212の表面から突出したリフトピン207上に水平姿勢で支持される。
続いて、第一の処理ガス供給工程S202を説明する。基板載置台212が図1のようにウエハ処理ポジションに移動したら、排気管281を介して処理室201から雰囲気を排気して、処理室201内の圧力を調整する。所定の圧力に調整しつつ、基板100の温度が所定の温度、例えば500℃から600℃に加熱する。
原料ガス供給部242では、バルブ246を開にすると共に、MFC245で処理ガスの流量を調整する。パージガス供給部248では、バルブ252を閉にする。このような動作により、共通ガス供給管241から処理室201に処理ガス、例えばDCSガスを処理室に供給する。供給されたDCSガスは基板100上にシリコン含有層を形成する。
本実施形態においては交互供給方法にて基板100を処理している。交互供給法では、第一の処理ガス供給工程と後述する第二の処理ガス供給工程を交互に行うが、第二の処理ガス供給工程にてプラズマ状の処理ガスを基板に供給する。
例えば、ラジカルの量が少ないと判断したら、より多くのパワーをRPU265に供給するよう制御する。
続いて、パージ工程S204を説明する。DCSガスの供給を停止した後は、パージガス供給管249からパージガスを供給し、処理室201内の雰囲気のパージを行う。ここでは、バルブ246およびバルブ266は閉とされると共に、バルブ252、バルブ271、バルブ274を開とする。
続いて、第二の処理ガス供給工程S206を説明する。処理室201のパージが完了したら、続いて、第二の処理ガス供給工程S206を行う。第二ガス供給部260では、バルブ266を開、バルブ274、バルブ271を閉として、RPU265、シャワーヘッド230を介して、処理室201内に第二の処理ガスとして第二元素含有ガスであるNH3ガスを供給する。このとき、NH3ガスの流量が所定流量となるように、MFC263を調整する。NH3ガスの供給流量は、例えば1000〜10000sccmである。
続いて、パージ工程S208を説明する。NH3ガスの供給を停止した後は、上述したパージ工程S204と同様のパージ工程S208を実行する。パージ工程S208における各部の動作は、上述したパージ工程S204と同様であるので、ここでの説明を省略する。
続いて、判定工程S210を説明する。第一の処理ガス供給工程S202、パージ工程S204、第二の処理ガス供給工程S206、パージ工程S208を1サイクルとして、コントローラ400は、このサイクルを所定回数(nサイクル)実施したか否かを判定する。サイクルを所定回数実施すると、基板100上には、所望膜厚のSiN層が形成される。所定回数実施したとき(S210でYesの場合)、図5に示す処理を終了する。
続いて基板搬出工程を説明する。所望の膜厚のSiN層が形成されたら、基板載置台212を下降させ、基板100を搬送ポジションに移動する。その後、ゲートバルブ149を開き、アーム(不図示)を用いて基板100をチャンバ202の外へ搬出する。
200 基板処理装置
265 プラズマ生成部
Claims (10)
- 基板を処理する処理室と、
前記処理室で基板を支持する基板支持部と、
前記基板支持部の基板支持面と対向する前記処理室の壁に設けられた複数の反応ガス供給孔と、
前記処理室に固定され、前記反応ガス供給孔のそれぞれに連通する反応ガス供給管と、
前記反応ガス供給管の上流に設けられ、反応ガスをプラズマ状態とするプラズマ生成部と、
前記プラズマ生成部と前記処理室との間で、前記反応ガス供給管に接続される不活性ガス供給管と、
前記不活性ガス供給管と前記プラズマ生成部との間で前記反応ガス供給管に接続されるバイパス管と
を有する複数の反応ガス供給部と、
前記プラズマ生成部に接続され、複数の前記プラズマ生成部を個別に制御可能なプラズマ制御部と、
を有する基板処理装置。 - 前記反応ガス供給管には、前記バイパス管の接続部と前記不活性ガス供給管の合流部の間に第一のバルブが設けられ、
前記不活性ガス供給管には第二のバルブが設けられ、
前記バイパス管には第三のバルブが設けられる、
請求項1に記載の基板処理装置。 - 前記バイパス管には、プラズマモニタ部が設けられ、前記プラズマモニタ部が検出したプラズマの状態は、前記プラズマ制御部に送信される請求項1または請求項2に記載の基板処理装置。
- さらに、前記プラズマ制御部を制御可能なコントローラとを有し、
前記プラズマ生成部には前記プラズマ制御部が接続され、
前記コントローラは、それぞれの前記プラズマモニタ部で検出した検出値が所望の状態でないと判断したら、所望の状態となるよう、前記プラズマモニタ部に対応した前記プラズマ制御部を制御する請求項3に記載の基板処理装置。 - 前記基板支持部は、回転可能な構造である請求項1から請求項4のうち、いずれか一項に記載の基板処理装置。
- 前記反応ガス供給孔は、前記基板の中心と偏心するよう構成される請求項1から請求項5のうち、いずれか一項に記載の基板処理装置。
- 前記処理室は、前記反応ガスと反応する原料ガスを供給する原料ガス供給部と連通され、
前記原料ガス供給部から前記原料ガスを供給する際は、前記第二のバルブ、前記第三のバルブを開にすると共に、前記第一のバルブを閉とし、
前記原料ガス供給部から前記原料ガスを供給せずに、前記反応ガス供給部から反応ガスを供給する際は、前記第二のバルブ、前記第三のバルブを閉にすると共に、前記第一のバルブを開とするよう制御する請求項2に記載の基板処理装置。 - 前記処理室は、前記処理室の雰囲気をパージするパージガス供給部と連通され、
前記パージガス供給部からパージガスを供給する際は、
前記第二のバルブ、前記第三のバルブを開にすると共に、前記第一のバルブを閉とし、
前記パージガス供給部から前記パージガスを供給せずに、前記反応ガス供給部から反応ガスを供給する際は、前記第二のバルブ、前記第三のバルブを閉にすると共に、前記第一のバルブを開とするよう制御する請求項2または請求項7に記載の基板処理装置。 - 処理室に基板を搬入して基板支持部に載置する工程と、
前記基板支持部の基板支持面と対向する前記処理室の壁に設けられた複数の反応ガス供給孔のそれぞれと対応して設けられた前記処理室に固定される反応ガス供給管と、前記反応ガス供給管の上流に設けられ、反応ガスをプラズマ状態とするプラズマ生成部と、前記プラズマ生成部と前記処理室との間で、前記反応ガス供給管に接続される不活性ガス供給管と、前記不活性ガス供給管と前記プラズマ生成部との間で前記反応ガス供給管に接続されるバイパス管とを有する複数の反応ガス供給部から、反応ガスを供給する工程と
を有する半導体装置の製造方法。 - 処理室に基板を搬入して基板支持部に載置する手順と、
前記基板支持部の基板支持面と対向する前記処理室の壁に設けられた複数の反応ガス供給孔のそれぞれと対応して設けられた前記処理室に固定される反応ガス供給管と、前記反応ガス供給管の上流に設けられ、反応ガスをプラズマ状態とするプラズマ生成部と、前記プラズマ生成部と前記処理室との間で、前記反応ガス供給管に接続される不活性ガス供給管と、前記不活性ガス供給管と前記プラズマ生成部との間で前記反応ガス供給管に接続されるバイパス管とを有する複数の反応ガス供給部から、反応ガスを供給する手順と、
をコンピュータによって基板処理装置に実行させるプログラム。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2018172705A JP6906490B2 (ja) | 2018-09-14 | 2018-09-14 | 基板処理装置、半導体装置の製造方法およびプログラム |
TW107141190A TWI713133B (zh) | 2018-09-14 | 2018-11-20 | 基板處理裝置、半導體裝置的製造方法及程式 |
CN201910051465.2A CN110911261B (zh) | 2018-09-14 | 2019-01-18 | 衬底处理装置、半导体器件的制造方法及记录介质 |
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