JP7209155B2 - デザイナー原子層エッチング - Google Patents
デザイナー原子層エッチング Download PDFInfo
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- JP7209155B2 JP7209155B2 JP2019533041A JP2019533041A JP7209155B2 JP 7209155 B2 JP7209155 B2 JP 7209155B2 JP 2019533041 A JP2019533041 A JP 2019533041A JP 2019533041 A JP2019533041 A JP 2019533041A JP 7209155 B2 JP7209155 B2 JP 7209155B2
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
- H01L21/32133—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only
- H01L21/32135—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only by vapour etching only
- H01L21/32138—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only by vapour etching only pre- or post-treatments, e.g. anti-corrosion processes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67069—Apparatus for fluid treatment for etching for drying etching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67098—Apparatus for thermal treatment
- H01L21/67103—Apparatus for thermal treatment mainly by conduction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67098—Apparatus for thermal treatment
- H01L21/67109—Apparatus for thermal treatment mainly by convection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67155—Apparatus for manufacturing or treating in a plurality of work-stations
- H01L21/67207—Apparatus for manufacturing or treating in a plurality of work-stations comprising a chamber adapted to a particular process
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67259—Position monitoring, e.g. misposition detection or presence detection
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/20—Positioning, supporting, modifying or maintaining the physical state of objects being observed or treated
- H01J2237/2001—Maintaining constant desired temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/32—Processing objects by plasma generation
- H01J2237/33—Processing objects by plasma generation characterised by the type of processing
- H01J2237/334—Etching
- H01J2237/3341—Reactive etching
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Description
本出願は、2016年12月19日に出願された「DESIGNER ATOMIC LAYER ETCHING」と題する米国特許仮出願第62/436,286号、および2017年7月14日に出願された「DESIGNER ATOMIC LAYER ETCHING」と題する米国特許仮出願第62/532,916号の両方に対し優先権を主張する、2017年12月13日に出願された「DESIGNER ATOMIC LAYER ETCHING」と題する、米国特許出願第15/841,205号の利益を主張する。これらの出願は、参照によりその全体が本出願において組み込まれる。
装置
実験
結論
[適用例1]
基板上の材料をエッチングする方法であって、
改質ガスおよび除去ガスを用いた前記材料の原子層エッチングプロセスのためのプロセス条件を特定すること、および
前記基板上の材料に前記原子層エッチングプロセスを、
エッチングされる前記材料に対して改質エネルギーおよび脱着エネルギーを有する前記改質ガスに前記基板を曝露して、前記材料の表面を改質すること、および
前記改質表面を前記除去ガスに曝露し、プラズマを発生させて、前記改質表面を除去すること、
により実施することを含み、
前記改質エネルギーが、前記脱着エネルギーより小さく、前記脱着エネルギーが前記材料の表面結合エネルギーより小さい、方法。
[適用例2]
適用例1に記載の方法であって、
前記プロセス条件を特定することが、前記基板の改質ガスへの前記基板の曝露を実施するための基板温度を選択することを含み、前記基板温度により得られるエネルギーが、前記改質エネルギーと前記脱着エネルギーとの間にある、方法。
[適用例3]
適用例1に記載の方法であって、
前記プロセス条件を特定することが、前記改質表面の除去ガスへの曝露中にバイアスを印加するためのバイアス電力を選択することを含み、前記バイアスにより得られるエネルギーが前記脱着エネルギーと前記表面結合エネルギーとの間にある、方法。
[適用例4]
適用例1に記載の方法であって、
前記改質ガスが、前記材料をエッチングすることなく前記材料に吸着するように選択される、方法。
[適用例5]
適用例1に記載の方法であって、
前記除去ガスが、下層の非改質材料をエッチングすることなく、前記改質表面を除去するように選択される、方法。
[適用例6]
適用例1に記載の方法であって、
前記プロセス条件が、温度、チャンバー圧、プラズマ出力、バイアス電力、改質ガス流、および暴露時間からなる群より選択される、方法。
[適用例7]
適用例1に記載の方法であって、
プロセスウィンドウ内の前記プロセス条件を修正することをさらに含む、方法。
[適用例8]
適用例1に記載の方法であって、
前記材料が、ケイ素、炭素、タングステン、およびタンタルからなる群より選択される、方法。
[適用例9]
適用例8に記載の方法であって、
前記原子層エッチングプロセスを実施する前に、前記基板を約0℃未満の温度に冷却することをさらに含み、前記特定されるプロセス条件が温度であり、前記材料がタンタルである、方法。
[適用例10]
適用例9に記載の方法であって、
前記基板が、約0℃未満の基板温度で前記改質ガスに曝露される、方法。
[適用例11]
適用例9に記載の方法であって、
前記温度が、約-20℃~約0℃である、方法。
[適用例12]
適用例9に記載の方法であって、
前記基板が窒化タンタルを含む、方法。
[適用例13]
適用例1に記載の方法であって、
バイアスが、前記基板を前記改質ガスに曝露すること、および前記改質表面を前記除去ガスに曝露することの内の少なくとも1つで印加される、方法。
[適用例14]
適用例1~13のいずれか一項に記載の方法であって、
原子層エッチングが、前記基板を前記改質ガスに曝露することと、前記基板を前記除去ガスに曝露することとの間で、前記基板を収容するチャンバーをパージすることをさらに含む、方法。
[適用例15]
適用例14に記載の方法であって、
パージが、N 2 、Ar、Ne、He、およびこれらの組み合わせからなる群より選択される不活性ガスを供給することにより実施される、方法。
[適用例16]
適用例1~13のいずれか一項に記載の方法であって、
前記改質ガスがハロゲン含有ガスである、方法。
[適用例17]
適用例16に記載の方法であって、
前記改質ガスが塩素である、方法。
[適用例18]
適用例16に記載の方法であって、
前記改質ガスが、臭素、ヨウ素、六フッ化硫黄、四フッ化ケイ素、および三塩化ホウ素(BCl 3 )からなる群より選択される、方法。
[適用例19]
適用例1~13のいずれか一項に記載の方法であって、
前記除去ガスが不活性ガスである、方法。
[適用例20]
適用例19に記載の方法であって、
前記除去ガスがネオンまたはクリプトンである、方法。
[適用例21]
基板上のタンタルをエッチングする方法であって、
前記タンタルを含む基板を用意すること、
前記基板を約0℃未満の温度に冷却すること、および、
前記タンタルの原子層エッチングを、
前記基板を改質ガスに曝露して、前記タンタルの表面を改質すること、および
前記改質表面を除去ガスに曝露し、プラズマを発生させて、前記タンタルの改質表面を除去すること、
により実施することを含む、方法。
[適用例22]
適用例21に記載の方法であって、
前記基板が、約0℃未満の基板温度で前記改質ガスに曝露される、方法。
[適用例23]
適用例21に記載の方法であって、
前記温度が、約-20℃~約0℃である、方法。
[適用例24]
適用例21に記載の方法であって、
前記基板が窒化タンタルを含む、方法。
[適用例25]
適用例21に記載の方法であって、
バイアスが、前記基板を前記改質ガスに曝露すること、および前記改質表面を前記除去ガスに曝露することの内の少なくとも1つで印加される、方法。
[適用例26]
適用例21~25のいずれか一項に記載の方法であって、
原子層エッチングが、前記基板を前記改質ガスに曝露することと、前記基板を前記除去ガスに曝露することとの間で、前記基板を収容するチャンバーをパージすることをさらに含む、方法。
[適用例27]
適用例26に記載の方法であって、
パージが、N 2 、Ar、Ne、He、およびこれらの組み合わせからなる群より選択される不活性ガスを供給することにより実施される、方法。
[適用例28]
適用例21~25のいずれか一項に記載の方法であって、
前記改質ガスがハロゲン含有ガスである、方法。
[適用例29]
適用例28に記載の方法であって、
前記改質ガスが塩素である、方法。
[適用例30]
適用例28に記載の方法であって、
前記改質ガスが、臭素、ヨウ素、六フッ化硫黄、四フッ化ケイ素、および三塩化ホウ素(BCl 3 )からなる群より選択される、方法。
[適用例31]
適用例21~25のいずれか一項に記載の方法であって、
前記除去ガスが不活性ガスである、方法。
[適用例32]
適用例31に記載の方法であって、
前記除去ガスがネオンまたはクリプトンである、方法。
[適用例33]
基板を処理するための装置であって、
シャワーヘッドおよび材料を有する前記基板を保持するための基板支持体を含むプロセスチャンバー、
プラズマ発生器、および
少なくとも1つのプロセッサーおよび記憶装置を有する制御装置を含み、
前記少なくとも1つのプロセッサーおよび前記記憶装置が、相互に通信可能に接続され、
前記少なくとも1つのプロセッサーが、流量制御ハードウェアと少なくとも操作可能に接続され、
前記記憶装置が、
改質ガスおよび除去ガスを用いた前記材料の原子層エッチングプロセスのためのプロセス条件の特定を可能とすること、および
前記基板上の前記材料に前記原子層エッチングプロセスを、
エッチングされる前記材料に対して改質エネルギーおよび脱着エネルギーを有する改質ガスを導入して前記材料の表面の改質すること、および
前記除去ガスの導入およびプラズマの生成を可能として、前記改質表面を除去すること、により実施可能とすること、
のための機械可読命令を保存し、
前記改質エネルギーが、前記脱着エネルギーより小さく、前記脱着エネルギーが前記材料の表面結合エネルギーより小さい、装置。
[適用例34]
適用例33に記載の装置であって、
前記プロセス条件が、温度、チャンバー圧、プラズマ出力、バイアス電力、改質ガス流、および暴露時間からなる群より選択される、装置。
[適用例35]
適用例33に記載の装置であって、
前記機械可読命令が、プロセスウィンドウ内の前記プロセス条件の修正を可能とする命令をさらに含む、装置。
[適用例36]
適用例33に記載の装置であって、
前記機械可読命令が、前記原子層エッチングプロセスの実施を可能とする前に、前記基板支持体温度を約0℃未満の温度に設定可能とする命令をさらに含む、装置。
[適用例37]
適用例36に記載の装置であって、
前記機械可読命令が、前記改質ガスの導入を可能としている間に、前記基板支持体温度を約0℃未満の温度に設定可能とする命令をさらに含む、装置。
[適用例38]
適用例36に記載の装置であって、
前記基板支持体温度が、約-20℃~約0℃である、装置。
[適用例39]
適用例33に記載の装置であって、
前記機械可読命令が、前記改質ガスの導入を可能とすることおよび前記除去ガスの導入を可能とすることの内の少なくとも1つの間に、前記基板支持体にバイアスを印加可能とする命令をさらに含む、装置。
[適用例40]
適用例33~39のいずれか一項に記載の装置であって、
前記原子層エッチングを実施する機械可読命令が、前記改質ガスの導入を可能とすることと、前記除去ガスの導入を可能とすることとの間に、前記プロセスチャンバーのパージを可能とする命令をさらに含む、装置。
[適用例41]
基板を処理するための装置であって、
シャワーヘッドおよび前記基板を保持するための基板支持体を含むプロセスチャンバー、
プラズマ発生器、および
少なくとも1つのプロセッサーおよび記憶装置を有する制御装置を含み、
前記少なくとも1つのプロセッサーおよび前記記憶装置が、相互に通信可能に接続され、
前記少なくとも1つのプロセッサーが、流量制御ハードウェアと少なくとも操作可能に接続され、
前記記憶装置が、
前記タンタルを含む基板を有する前記基板支持体の温度を約0℃未満の温度に設定可能とすること、および、
前記タンタルの原子層エッチングを、
改質ガスの導入により、前記タンタルの表面を改質可能とすること、および、
前記除去ガスの導入およびプラズマの生成を可能として前記改質タンタルの除去を可能とすること、
により実施可能とすること、
のための機械可読命令を保存する、装置。
[適用例42]
適用例41に記載の装置であって、
前記機械可読命令が、前記改質ガスの導入を可能としている間に、前記基板支持体温度を約0℃未満の温度に設定可能とする命令をさらに含む、装置。
[適用例43]
適用例41に記載の装置であって、
前記基板支持体温度が、約-20℃~約0℃である、装置。
[適用例44]
適用例41に記載の装置であって、
前記機械可読命令が、前記改質ガスの導入を可能とすることおよび前記除去ガスの導入を可能とすることの内の少なくとも1つの間に、前記基板支持体にバイアスを印加可能とする命令をさらに含む、装置。
[適用例45]
適用例41~44のいずれか一項に記載の装置であって、
前記原子層エッチングを実施する機械可読命令が、前記改質ガスの導入を可能とすることと、前記除去ガスの導入を可能とすることとの間に、前記プロセスチャンバーのパージを可能とする命令をさらに含む、装置。
Claims (9)
- 基板上の材料をエッチングする方法であって、
改質ガスおよび除去ガスを用いた前記材料の原子層エッチングプロセスのためのプロセス条件を特定すること、および
前記基板上の材料に前記原子層エッチングプロセスを、
エッチングされる前記材料に対して改質エネルギーおよび脱着エネルギーを有する前記改質ガスに前記基板を曝露して、前記材料の表面を改質すること、および
前記改質表面を前記除去ガスに曝露し、プラズマを発生させて、前記改質表面を除去すること、
により実施することを含み、
前記改質エネルギーが、前記脱着エネルギーより小さく、前記脱着エネルギーが前記材料の表面結合エネルギーより小さく、
前記プロセス条件を特定することが、前記基板の改質ガスへの前記基板の曝露を実施するための基板温度を選択することを含み、前記基板温度により得られるイオンエネルギーが、前記改質エネルギーと前記脱着エネルギーとの間にあり、
前記材料は、約6eVよりも大きい表面結合エネルギーを有し、
前記材料が、ケイ素、炭素、ニオブ、モリブデン、ルテリウム、ロジウム、レニウム、オスミウム、タングステン、およびタンタルからなる群より選択され、
更に、前記原子層エッチングプロセスを実施する前に、前記改質エネルギーと前記脱着エネルギーとの間のイオンエネルギーを提供するための温度に前記基板を設定することを含み、
前記改質エネルギーと前記脱着エネルギーとの間の前記温度に前記基板を設定することは、前記基板を低い温度に冷却することを含む、
方法。 - 請求項1に記載の方法であって、
前記プロセス条件を特定することが、さらに、前記改質表面の除去ガスへの曝露中にバイアスを印加するためのバイアス電力を選択することを含み、前記バイアスにより得られるイオンエネルギーが前記脱着エネルギーと前記表面結合エネルギーとの間にある、方法。 - 請求項1に記載の方法であって、
前記改質ガスが、前記材料をエッチングすることなく前記材料に吸着するように選択される、方法。 - 請求項1に記載の方法であって、
前記除去ガスが、下層の非改質材料をエッチングすることなく、前記改質表面を除去するように選択される、方法。 - 請求項1に記載の方法であって、
前記プロセス条件は、チャンバー圧、プラズマ出力、バイアス電力、改質ガス流、および暴露時間からなる群より選択されるプロセス条件を更に含む、方法。 - 請求項1に記載の方法であって、
プロセスウィンドウ内の前記プロセス条件を修正することをさらに含む、方法。 - 請求項1に記載の方法であって、
前記改質ガスがハロゲン含有ガスである、方法。 - 請求項1に記載の方法であって、
前記除去ガスが不活性ガスである、方法。 - 請求項1に記載の方法であって、
前記原子層エッチングプロセスが、前記基板を前記改質ガスに曝露することと、前記改質表面を前記除去ガスに曝露することとの間で、前記基板を収容するチャンバーをパージすることをさらに含む、方法。
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