JP6772886B2 - 成膜装置 - Google Patents
成膜装置 Download PDFInfo
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- JP6772886B2 JP6772886B2 JP2017029366A JP2017029366A JP6772886B2 JP 6772886 B2 JP6772886 B2 JP 6772886B2 JP 2017029366 A JP2017029366 A JP 2017029366A JP 2017029366 A JP2017029366 A JP 2017029366A JP 6772886 B2 JP6772886 B2 JP 6772886B2
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45523—Pulsed gas flow or change of composition over time
- C23C16/45525—Atomic layer deposition [ALD]
- C23C16/45544—Atomic layer deposition [ALD] characterized by the apparatus
- C23C16/45548—Atomic layer deposition [ALD] characterized by the apparatus having arrangements for gas injection at different locations of the reactor for each ALD half-reaction
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45523—Pulsed gas flow or change of composition over time
- C23C16/45525—Atomic layer deposition [ALD]
- C23C16/45544—Atomic layer deposition [ALD] characterized by the apparatus
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/34—Nitrides
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/34—Nitrides
- C23C16/345—Silicon nitride
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- C23C16/4412—Details relating to the exhausts, e.g. pumps, filters, scrubbers, particle traps
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- C23C16/45523—Pulsed gas flow or change of composition over time
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- C23C16/45527—Atomic layer deposition [ALD] characterized by the ALD cycle, e.g. different flows or temperatures during half-reactions, unusual pulsing sequence, use of precursor mixtures or auxiliary reactants or activations
- C23C16/45536—Use of plasma, radiation or electromagnetic fields
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- C23C16/45523—Pulsed gas flow or change of composition over time
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- C23C16/45536—Use of plasma, radiation or electromagnetic fields
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- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
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- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
- H01L21/02274—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition in the presence of a plasma [PECVD]
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- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
- H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
- H01L21/0228—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition deposition by cyclic CVD, e.g. ALD, ALE, pulsed CVD
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- H01L21/683—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 for supporting or gripping
- H01L21/687—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
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- H01L21/68764—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by a movable susceptor, stage or support, others than those only rotating on their own vertical axis, e.g. susceptors on a rotating caroussel
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- 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
- H01L21/683—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 for supporting or gripping
- H01L21/687—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68714—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
- H01L21/68771—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by supporting more than one semiconductor substrate
Description
真空容器内にて回転テーブルに配置された基板を当該回転テーブルにより公転させ、互に回転テーブルの周方向に離れた領域の各々に原料成分を含む原料ガス及び反応ガスであるアンモニアガスを供給して基板に原料成分の窒化膜を成膜する成膜装置において、
前記回転テーブルに対向し、原料ガスを吐出する吐出部及び当該吐出部を囲む排気口並びに当該排気口を囲むパージガスの吐出口を備えた原料ガス供給部と、
前記原料ガス供給部に対して前記回転テーブルの周方向に離れて配置された、膜の窒化を行うための反応領域と、
前記反応領域に対して前記回転テーブルの周方向に離れて配置された、水素ガスにより前記窒化膜を改質するための改質領域と、
前記改質領域及び前記反応領域に夫々存在するガスを活性化するための改質用のプラズマ発生部及び反応ガス用のプラズマ発生部と、
前記反応領域にアンモニアガスを供給する反応ガス供給部と、
前記真空容器内を真空排気するための排気口と、を備え、
前記排気口は、前記改質領域の雰囲気と前記反応領域の雰囲気とを共通に排気する位置に設けられ、
前記改質領域に供給される水素ガスの流量は、0よりも多く、0.1リットル/分以下であり、
前記改質領域に供給される水素ガスは、前記反応領域に供給されたアンモニアガスが反応ガス用のプラズマ発生部により励起されて生成されることを特徴とする。
第1のプラズマ形成ユニット3A及び第3のプラズマ形成ユニット3Cについては、ガス吐出口42が設けられていないこと以外は、第2のプラズマ形成ユニット3Bと同様に構成されている。
{{(ベア膜厚)−(パターン膜厚)}/(ベア膜厚)}×100・・(1)
図1に示す成膜装置1において、原料ガスとしてDCSガスを用い、反応ガスインジェクター411、412及びガス吐出口42からNH3ガス及びArガスを吐出し、H2ガスは供給しないでSiN膜を成膜した(実施例)。反応ガスインジェクター411、412からの合計のNH3ガス流量は0.6リットル/分、合計のArガス流量は0.75リットル/分、ガス吐出口42からのNH3ガスの供給量は0.4リットル/分、Arガス流量は0.25リットル/分である。このSiN膜について、フッ酸溶液を用いてウェットエッチングを行い、このときのエッチングレートについて評価した。SiN膜の成膜条件は、回転テーブル12の温度:450℃、回転テーブル12の回転数:30rpm、プロセス圧力:266Paとした。また、第1の改質領域R2及び第2の改質領域R4に、夫々H2ガスを4.25リットル/分の流量で供給し、その他は実施例と同様の条件にてSiN膜を成膜した場合(比較例)についても、同様にエッチングレートを評価した。
実施例のSiN膜及び比較例のSiN膜について、二次イオン質量分析法(SINS:Secondary Ion Mass Spectrometry)により、膜中の水素濃度と、塩素濃度を分析した。この結果を図5に示す。図5(a)は水素濃度、図5(b)は塩素濃度である。図5中横軸は膜の深さ、縦軸は水素濃度(atoms/cc)又は塩素濃度(atoms/cc)であり、図5(a)、図5(b)共に、実施例(H2無)のデータを実線にて、比較例(H2有)のデータを点線にて夫々示す。
実施例のSiN膜及び比較例のSiN膜について、既述の手法にて(1)式を用いローディング効果を求めた。実施例のSiN膜の結果を図6(a)に、比較例のSiN膜の結果を図6(b)に夫々示す。図6(a)、図6(b)中左縦軸はSiN膜の膜厚、右縦軸はローディング効果、横軸はウエハWのX方向の直径上の位置を夫々示す。0はウエハWの中心、−150、150は夫々ウエハWのX方向の外縁である。図6(a)、図6(b)には、〇によりパターンウエハの膜厚、□によりベアウエハの膜厚、△によりローディング効果を夫々プロットしている。
第1及び第2の改質領域R2、R4に供給されるH2ガスの供給量を変えてSiN膜を成膜し、夫々のSiN膜のローディング効果を評価した。H2ガスは、トータルの供給量を、0、0.5リットル/分、2.14リットル/分、4.24リットル/分と変えてSiN膜を成膜した。その他の成膜条件は実施例と同様である。ローディング効果は既述の手法にて(1)式を用いて評価し、その最大値を求めた。この結果を図7に示す。図7中縦軸はローディング効果、横軸はH2ガスの供給量である。
R1 吸着領域
R2 第1の改質領域
R3 反応領域
R4 第2の改質領域
1 成膜装置
11 真空容器
12 回転テーブル
2 給排気ユニット
3A 第1のプラズマ形成ユニット
3B 第2のプラズマ形成ユニット
3C 第3のプラズマ形成ユニット
411、412 反応ガスインジェクター
42 ガス吐出口
51 排気口
Claims (4)
- 真空容器内にて回転テーブルに配置された基板を当該回転テーブルにより公転させ、互に回転テーブルの周方向に離れた領域の各々に原料成分を含む原料ガス及び反応ガスであるアンモニアガスを供給して基板に原料成分の窒化膜を成膜する成膜装置において、
前記回転テーブルに対向し、原料ガスを吐出する吐出部及び当該吐出部を囲む排気口並びに当該排気口を囲むパージガスの吐出口を備えた原料ガス供給部と、
前記原料ガス供給部に対して前記回転テーブルの周方向に離れて配置された、膜の窒化を行うための反応領域と、
前記反応領域に対して前記回転テーブルの周方向に離れて配置された、水素ガスにより前記窒化膜を改質するための改質領域と、
前記改質領域及び前記反応領域に夫々存在するガスを活性化するための改質用のプラズマ発生部及び反応ガス用のプラズマ発生部と、
前記反応領域にアンモニアガスを供給する反応ガス供給部と、
前記真空容器内を真空排気するための排気口と、を備え、
前記排気口は、前記改質領域の雰囲気と前記反応領域の雰囲気とを共通に排気する位置に設けられ、
前記改質領域に供給される水素ガスの流量は、0よりも多く、0.1リットル/分以下であり、
前記改質領域に供給される水素ガスは、前記反応領域に供給されたアンモニアガスが反応ガス用のプラズマ発生部により励起されて生成されることを特徴とする成膜装置。 - 前記排気口は、平面で見て前記反応領域に臨む前記回転テーブルの外側に設けられていることを特徴とする請求項1記載の成膜装置。
- 前記反応領域に供給されるアンモニアガスの流量は、0.05リットル/分〜4.0リットル/分であることを特徴とする請求項1または2に記載の成膜装置。
- 前記改質領域は、前記回転テーブルの周方向に互いに離れて配置された第1の改質領域及び第2の改質領域を含み、
前記改質用のプラズマ発生部は、前記第1の改質領域及び第2の改質領域に夫々対応して設けられていることを特徴とする請求項1ないし3のいずれか一項に記載の成膜装置。
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