JPWO2009054232A1 - 半導体製造装置、半導体製造方法及び電子機器 - Google Patents
半導体製造装置、半導体製造方法及び電子機器 Download PDFInfo
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- JPWO2009054232A1 JPWO2009054232A1 JP2008549301A JP2008549301A JPWO2009054232A1 JP WO2009054232 A1 JPWO2009054232 A1 JP WO2009054232A1 JP 2008549301 A JP2008549301 A JP 2008549301A JP 2008549301 A JP2008549301 A JP 2008549301A JP WO2009054232 A1 JPWO2009054232 A1 JP WO2009054232A1
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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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- C23C16/22—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
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- C—CHEMISTRY; METALLURGY
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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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- 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
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Abstract
Description
非励起状態の半導体ガスを処理室へ導入する第1導入手段と、
励起状態の非半導体ガスを前記処理室へ導入する第2導入手段と、
を備える。
前記第2導入手段は、前記非半導体ガスが貯蓄されているボンベから、前記リモートプラズマ装置を経由して、前記処理室に向かう第2ガス供給管を有するとよい。これにより、第1及び第2ガス供給管から同時に各ガスを処理室に供給することが可能となり、相対的に、処理時間を短くすることができる。
前記半導体ガスが貯蓄されているボンベから、リモートプラズマ装置を経由することなく、前記処理室に向かう第1ガス供給管と、
前記第1ガス供給管に設けられている第1バルブと、
前記非半導体ガスが貯蓄されているボンベから、前記リモートプラズマ装置を経由して、前記処理室に向かう第2ガス供給管と、
前記第2ガス供給管に設けられている第2バルブと、
前記リモートプラズマ装置のオン/オフを切り替えると共に前記第1及び第2バルブの開閉を切り替える切換手段とを有するものとしてもよい。
N2ガス,NH3ガスを含む窒素系ガス、
N2Oガス,O2ガス,O3ガス,水蒸気を含む酸素系ガス、
H2を含む水素系ガスのいずれかであり、
前記半導体ガスは、SiH4ガス、Si2H6ガス、メチルシランガス、シロキサンガス、シラザンガス、メトキシシランガス、エトキシシランガス、HMDSOガス、HMDSガス、OMCTSガス、HEDSガス、TMDSガス、TEDSガス、TMCTSガス、TECTSガス、OMTSOガスを含むシリコン系ガスである、
ゲルマニウム系ガス 、セレン系ガス、リン系ガス、アルミニウムアンチモン、ガリウム系ガス、アンチモン系ガス、インジウム系ガスのいずれかである。
前記リモートプラズマ装置によってエッチングを行うエッチング手段と、を備えることもできる。これにより、トレンチ内の埋込物を緻密にすることが可能となる。
前記励起状態の非半導体ガスとしてO2を含まない原料ガスを用いて前記レジストパターンのサイドウォールにレジストとして機能する半導体膜を形成する手段と、
当該サイドウォール間に対応する領域をエッチングするエッチング手段とを備えることもできる。これにより、半導体膜のエッチング領域を制御することによって、様々な太さの配線を実現でき、例えば、微細配線等を実現することもできる。具体的には、レジストパターンよりも微細なエッチングパターンを形成できるので、ホトリソグラフィーの限界を超えた、さらに微細なパターンも実現できる。実験結果としては、32nm以下の微細パターンを実現した。
前記照射手段によって光が照射された後又は照射中に前記レジストパターンをアッシングするアッシング手段とを備える。これにより、レジストを好適に除去することができる。例えば、高濃度にイオン注入されたレジスト膜のアッシングも容易に行うことができる。
励起状態の非半導体ガスを前記処理室へ導入するステップと、
を含む。
形成できる。またレジストパターン上に100℃以下で絶縁膜を形成でき、32nm以下の微細パターンを形成できる。さらに高濃度にイオン注入されたレジスト膜のアッシングが容易になる。
(実施形態1)
図1は、本発明の実施形態1の半導体製造装置の模式的な構成図である。本実施形態では、主として、低誘電率膜を改質する装置について説明する。
第一チャンバー5に対してNH3ガス等を導入するのに先立って、リモートプラズマ装置11をオンしてから、Arガス供給管82及びO3ガス供給管77に係る各マスフローコントローラー15の制御によって各バルブ16を開き、リモートプラズマ装置11に向けてArガスを例えば200cc/min、O3ガスを例えば600cc/minの流量で出力する。Arガス及びO3ガスは、リモートプラズマ装置11によってプラズマ化されてから、導入路21及びノズル22を通じて第一チャンバー5に導入される。ただし、高濃度O3ガスを用いる場合はリモートプラズマ装置をオフとし、それらのガスを励起しないでチャンバーに導入してもよい。
図4は、本発明の実施形態2に係るウェハ41の断面図である。図4(a)には、STIに係るトレンチ201の形成後に変形例1等で説明した手法で形成されたSiO2膜202を有するウェハ41を示している。図4(b)には、図4(a)に示すウェハ41の紫外線を照射後の様子を示す図である。
図5は、本発明の実施形態3に係る第一チャンバー5の模式的な構成図である。図5には、図2に示した部分に加えて、13.56MHz又は400KHzのRF電源91と、RF電源91から供給される電力に基づいて高周波プラズマを発生させるための配線17とを備えている。
図7は、本発明の実施形態4のチャンバー5に対応する処理室の模式的な構成図である。図7には、種々のガスが通る複数穴が形成されている内部石英管322と、内部石英管322の周辺を覆っていて減圧CVD処理室を形成する外部石英管321と、各石英管321,322を加熱する炉311と、外部石英管321に連結されている排気パイプ331と、外部石英管321と内部石英管322の間、またはガスノズル325にオゾンガスO3ガス及び/又は水蒸気を導入するための配管301と内部石英管322に半導体ガスを導入するための配管302を示している。図7では外部石英管321と内部石英管322の間にガスノズル325を取り付けた状態を示しているが、ガスノズル325を取り付けないで、ガスを直接導入してもよい。ここで配管301と配管302に導入するガスは交互に取り替えてもよい。さらにリモートプラズマ装置に接続される配管303と、配管303とガス集合配管とをまとめるマニホールド305と、ウェハ41の酸化防止用のN2ガスを充満したシールドボックス304とを示している。
図12(a)は、高誘電率膜であるところのHfO2膜501が形成されたウェハ41の模式的な断面図である。図12(b)は、図12(a)に示すウェハ41のO3ガスアニール後の様子を示す図である。
図13は、本発明の実施形態6に係るSiON膜603に対するビアホール形成方法を示す図である。図13(a)には、低誘電率膜601上にレジストパターン602を形成し、次いでSiON膜603を形成した様子を示している。図13(b)には、図13(a)に示す低誘電率膜601に対して異方性エッチング装置を用いてエッチングを行ってビアホール604を形成した様子を示している。
(変形例1)
以下の点を、実施形態6に対して変更してもよい。すなわち、まず、第一チャンバー5内の圧力を50Pa〜150Pa(例えば99.8Pa)とした状態でジメトキシテトラメチルジシロキサンガスとH2Oガス、O2ガスさらにHeガスをそれぞれ、第一チャンバー5に約流量75cc/min、450cc/min、50cc/minおよび100cc/min流した。
そして、上部電極に13.56MHzのRF(図示しない)を500W〜650W(例えば600W)の出力で数10秒から数分(例えば30秒)間加えて、ガスのプラズマ化を行う。
この結果、厚さが30nmの酸化膜603が、ウェハ41のレジストパターン602上に形成される。その後、実施形態6と同様の条件で、第二チャンバー6において紫外線照射処理を行ったところ、酸化膜603の厚さは、平均で約4%減少した。
それから、図示しないエッチング装置で等法性エッチングを行うことで、図5(a)にしめすように、レジストパターン602のサイドウォールに酸化膜603が形成される。換言すると、レジストパターン602のサイドウォール間に、レジストの一部を構成する酸化膜603が形成されるので、レジストパターン602のみを形成した場合に比して、狭いビアホール604を形成可能となる。
なお、ジメトキシテトラメチルジシロキサンガスに代えて、トリメチルシラン(HSi(CH3)3)ガス、トリメトキシシラン(HSi(OCH3)3)ガス、テトラメトキシシラン(Si(OCH3)4)ガス、テトラエトキシシラン(Si(OC2H5)4)ガス、ジシロキサン(H3−Si−O−Si−H3)ガス、ジメトキシテトラメチルジシラザン((OCH3)(CH3)2−Si−NH−Si−(CH3)2(OCH3))ガスなどのアルキル基又はアルコキシ基を有する反応ガスを用いてもよい。また、水蒸気に代えてN2Oガスを用いてもよい。
(変形例2)
以下の点を、実施形態6に対して変更してもよい。すなわち、まず、第一チャンバー5内の圧力を50Pa〜150Pa(例えば99.8Pa)とした状態でジメトキシテトラメチルジシロキサンガスとH2Oガス、O2ガスさらにHeガスをそれぞれ、第一チャンバー5に約流量75cc/min、450cc/min、50cc/minおよび100cc/min流した。
そして、下部電極(基板)に対し、400MHzのRF(図示しない)を100W〜300W(例えば200W)の出力で数10秒から数分(例えば60秒)間加えて、ガスのプラズマ化を行う。
この結果、厚さが30nmの酸化膜603が、ウェハ41のレジストパターン602上に形成される。この膜はカソードカップリング方式で形成したため膜が緻密で、空孔径が0.5nm〜0.6nmと小さい。その後、実施形態6と同様の条件で、第二チャンバー6において紫外線照射処理を行ったところ、酸化膜603の厚さは、平均で約2%減少した。
それから、図示しないエッチング装置で等法性エッチングを行うことで、図5(a)にしめすように、レジストパターン602のサイドウォールに酸化膜603が形成される。換言すると、レジストパターン602のサイドウォール間に、レジストの一部を構成する酸化膜603が形成されるので、レジストパターン602のみを形成した場合に比して、狭いビアホール604を形成可能となる。
なお、ジメトキシテトラメチルジシロキサンガスに代えて、トリメチルシラン(HSi(CH3)3)ガス、トリメトキシシラン(HSi(OCH3)3)ガス、テトラメトキシシラン(Si(OCH3)4)ガス、テトラエトキシシラン(Si(OC2H5)4)ガス、ジシロキサン(H3−Si−O−Si−H3)ガス、ジメトキシテトラメチルジシラザン((OCH3)(CH3)2−Si−NH−Si−(CH3)2(OCH3))ガスなどのアルキル基又はアルコキシ基を有する反応ガスを用いてもよい。また、水蒸気に代えてN2Oガスを用いてもよい。
図14は、本発明の実施形態7に係るウェハ41の断面図である。図14に示すレジストパターン上からトランジスタのソースドレインに不純物イオンであるAsを高濃度(>1015ドーズ/cm2)でイオン注入したウェハ41を第一チャンバー5から第二チャンバー6に搬送する。図14には、トランジスタ700と、そのゲート酸化膜701と、ゲート電極702と、サイドウォール絶縁膜703と、N−領域(Asの濃度の少ない領域704と、N+領域(Asの濃度の多い領域)705と、絶縁膜706と、Asが高濃度にイオン注入されたレジスト707とを示す。ウェハ41は、第二チャンバー6のヒーター51上に載置される。ヒーター51の設定温度は、150℃以下でよい。ウェハ41に対して、例えば、波長300nm以下の紫外線ランプであるXeエキシマランプ(波長172nm)又は低圧Hgランプ(波長185+254nm)から、照度10mW/cm2で1分間、紫外光を照射する。その後、選択的に、第二チャンバー6内を窒素ガス又は不活性ガス雰囲気にしてから、第二チャンバー6内を加温して、レジスト707を破裂させる。それから、第二チャンバー6内にO3ガスを導入して、1分間アッシングする。
本発明の実施形態8に係る半導体デバイスの製造方法について説明する。図2に示す第一チャンバー1のヒーター51によって50〜300℃(例えば200℃)に加熱された処理室内に、ロードロックチャンバー3内のロボットアームを用いて、ウェハ41であるところのガラス基板を搬送する。
図15は、本発明の実施形態8に係る処理室及びこれに付帯する部分の模式的な構成図である。図15に示す処理室は、図7に示した処理室を変形したものであり、かつ、当該処理室内には図8に示したようなウェハホルダー401が収容されている。
2 第二チャンバー
Claims (20)
- 非励起状態の半導体ガスを処理室へ導入する第1導入手段と、
励起状態の非半導体ガスを前記処理室へ導入する第2導入手段と、
を備える半導体製造装置。 - 非励起状態の半導体ガスを処理室へ導入する第1導入手段と、
減圧下で非励起状態の高濃度O3ガスを含む非半導体ガスを前記処理室へ導入する第2導入手段と、
を備える半導体製造装置。 - 前記第1導入手段と前記第2導入手段とを交互にオン/オフする制御手段を備える請求項1記載の半導体製造装置。
- 前記第1導入手段は、前記半導体ガスが貯蓄されているボンベから、リモートプラズマ装置を経由することなく、前記処理室に向かう第1ガス供給管を有し、
前記第2導入手段は、前記非半導体ガスが貯蓄されているボンベから、前記リモートプラズマ装置を経由して、前記処理室に向かう第2ガス供給管を有する
請求項1記載の半導体製造装置。 - 前記第1及び第2導入手段は、
前記半導体ガスが貯蓄されているボンベから、リモートプラズマ装置を経由することなく、前記処理室に向かう第1ガス供給管と、
前記第1ガス供給管に設けられている第1バルブと、
前記非半導体ガスが貯蓄されているボンベから、前記リモートプラズマ装置を経由して、前記処理室に向かう第2ガス供給管と、
前記第2ガス供給管に設けられている第2バルブと、
前記リモートプラズマ装置のオン/オフを切り替えると共に前記第1及び第2バルブの開閉を切り替える切換手段とを有する、
請求項1記載の半導体製造装置。 - 前記励起後の非半導体ガスと前記半導体ガスとの各吐出位置が異なる、
請求項1から4のいずれか記載の半導体製造装置。 - 前記励起後の非半導体ガスと前記半導体ガスとの各吐出位置が複数存在する、
請求項1から4のいずれか記載の半導体製造装置。 - 前記非半導体ガスは、
N2ガス,NH3ガスを含む窒素系ガス、
N2Oガス,O2ガス,O3ガス,水蒸気を含む酸素系ガス、
H2を含む水素系ガスのいずれかであり、
前記半導体ガスは、O成分又はH成分を含むシリコン系ガスである、
ゲルマニウム系ガス 、セレン系ガス、リン系ガス、アルミニウムアンチモン、ガリウム系ガス、アンチモン系ガス、インジウム系ガスのいずれかである、
請求項1から6のいずれか記載の半導体製造装置。 - 前記処理室に導入されるガスは、不活性ガスとの混合ガスである、
請求項1から8のいずれか記載の半導体製造装置。 - 前記処理室での処理後に、前記ウェハに対してアニール処理を行う手段を有する、
請求項1から9のいずれか記載の半導体製造装置。 - 前記ウェハは、トレンチが形成される、
請求項1から10のいずれか記載の半導体製造装置。 - 前記トレンチ内の埋込物に対して炭素又は水素と他の元素との結合の切断に足りる波長の光を照射する照射手段と、
前記リモートプラズマ装置によってエッチングを行うエッチング手段と、を備える、
請求項11記載の半導体製造装置。 - 前記ウェハにバイアスを印加する印加手段を備える、
請求項11記載の半導体製造装置。 - 前記処理室は、前記ウェハが収容される第1石英管と当該第1石英管を覆う第2石英管とを含む二重石英管を備え、
減圧状況下で化学的気相成長処理を行う、
請求項1又は2記載の半導体製造装置。 - 前記ウェハに形成された半導体膜に対して、PH3、B2H6、P又はBを単一または両方含む化合物からP又はBをドープする手段を備える、
請求項1又は2記載の半導体製造装置。 - 前記ウェハは、HfO2膜、HfOXNY膜、HfOXSiY膜、HfOXNYSiZ膜、Al2O3膜、またはIr膜、Co膜、Ta膜、Ba膜を含む金属の高誘電率膜が形成される、
請求項1又は2記載の半導体製造装置。 - 前記ウェハ上にレジストパターンを形成する手段と、
前記励起状態の非半導体ガスとしてO2を含まない原料ガスを用いて前記レジストパターンのサイドウォールにレジストとして機能する半導体膜を形成する手段と、
当該サイドウォール間に対応する領域をエッチングするエッチング手段とを備える、
請求項1又は2記載の半導体製造装置。 - 前記レジストパターン内の結合を切断可能な波長の光を照射する照射手段と、
前記照射手段によって光が照射された後又は照射中に前記レジストパターンをアッシングするアッシング手段とを備える、
請求項16記載の半導体製造装置。 - 請求項1から18のいずれか記載の半導体製造装置によって製造された半導体素子を有する電子機器。
- 非励起状態の半導体ガスを処理室へ導入するステップと、
励起状態の非半導体ガスまたは減圧下で非励起状態の高濃度O3ガスを含む非励起状態の非半導体ガスを前記処理室へ導入するステップと、
を含む半導体製造方法。
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