JP4777683B2 - Paa系のエッチング液、それを利用するエッチング方法及び結果物の構造 - Google Patents
Paa系のエッチング液、それを利用するエッチング方法及び結果物の構造 Download PDFInfo
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- JP4777683B2 JP4777683B2 JP2005112763A JP2005112763A JP4777683B2 JP 4777683 B2 JP4777683 B2 JP 4777683B2 JP 2005112763 A JP2005112763 A JP 2005112763A JP 2005112763 A JP2005112763 A JP 2005112763A JP 4777683 B2 JP4777683 B2 JP 4777683B2
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- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
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- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
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Description
非損傷のSi → SiOx → SiF4、H2SiF6
12 高濃度のドーピング領域
22 フィールド領域
32 ソース/ドレイン拡張層
34 ソース/ドレイン領域
44、44a、44b ブリッジ
46 ゲート絶縁膜
48 ゲート電極
50 ゲートスタック層
Claims (42)
- 過酢酸(PAA)と、
フッ化酸と、
実質的に、CMOS素子のPMOSトランジスタのためのSiGe:Siのエッチング速度と同一な、CMOS素子のNMOSトランジスタのためのSiGe:Siのエッチング速度を確保するのに十分な組成物における前記PAAの相対的な量と、を含み、前記PAAの相対的な量は、1.0wt%ないし50wt%の範囲として、前記SiGeをエッチングすることを特徴とするウェットエッチングの組成物。 - 前記PAAの相対的な量は、3.0wt%であることを特徴とする請求項1に記載のウェットエッチングの組成物。
- 前記組成物は、希釈剤をさらに含むことを特徴とする請求項1に記載のウェットエッチングの組成物。
- 前記希釈剤は、脱イオン水を含むことを特徴とする請求項3に記載のウェットエッチングの組成物。
- 前記PAAの相対的な量は、前記組成物において、実質的に、CMOS素子のPMOSトランジスタのためのSiGe:Siのエッチング速度と同一な、CMOS素子のNMOSトランジスタのためのSiGe:Siのエッチング速度を確保するのに十分であることを特徴とする請求項1に記載のウェットエッチングの組成物。
- 前記PAAの相対的な量は、少なくとも60:1である(PドーピングされたSiGe):(PドーピングされたSi)≒(NドーピングされたSiGe):(NドーピングされたSi)の選択比を得るのに十分であることを特徴とする請求項5に記載のウェットエッチングの組成物。
- 前記組成物は、界面活性剤、2次酸化剤及び高分子からなる基から選択された付加的な組成物をさらに含むことを特徴とする請求項3に記載のウェットエッチングの組成物。
- 前記組成物は、陽イオン性の界面活性剤、陰イオン性の界面活性剤、及び非イオン性の界面活性剤からなる基から選択された界面活性剤をさらに含むことを特徴とする請求項3に記載のウェットエッチングの組成物。
- 前記界面活性剤は、セチルトリメチルアンモニウムブロミド(CTABr)、アンモニウムラウリルサルフェート(ALS)、ラウリルアルコールエチレンオキサイド、ステアリルアルコールエチレンオキサイド、ノニルフェノルエチレンオキサイド、トリデシルアルコールエチレンオキサイド、及びオレイルアルコールエチレンオキサイドからなる基から選択されたことを特徴とする請求項8に記載のウェットエッチングの組成物。
- 組成物は、陽イオン性の高分子及び陰イオン性の高分子からなる基から選択された高分子をさらに含むことを特徴とする請求項3に記載のウェットエッチングの組成物。
- 前記高分子は、ポリエチレンイミン、ポリリジン、ポリアクリル酸、ポリアクリルアミド、ポリメタクリル酸、ポリジエチルアミノエチルメタクリレート、及びポリジメチルアミノエチルメタクリレートからなる基から選択されたことを特徴とする請求項10に記載のウェットエッチングの組成物。
- 前記フッ化酸は、HF、NH4F及びその混合物からなる基から選択されたことを特徴とする請求項1に記載のウェットエッチングの組成物。
- 前記組成物は、少なくともH2O2、H3PO4、HNO3、H2SO4、I2、(NH4)2SO4、NH4IO3、HClO4、HClO2、O3及びH5IO6からなる基から選択された2次酸化剤をさらに含むことを特徴とする請求項1に記載のウェットエッチングの組成物。
- 前記酢酸、アンモニウムアセテート、メタノール、エタノール、プロパノール、イソプロパノール、ブタノール、ペンタノール、ヘキサノール及びへプタノールからなる基から選択された緩衝剤をさらに含むことを特徴とする請求項1に記載のウェットエッチングの組成物。
- 前記PAAは、前記ウェットエッチングの組成物に対して、0.05wt%ないし17.5wt%で構成され、
前記フッ化酸は、ウェットエッチングの組成物に対して、0.05wt%ないし15wt%で構成され、
前記ウェットエッチングの組成物に対して、界面活性剤、緩衝剤、2次酸化剤、高分子が選択的に含まれ、
前記界面活性剤は、前記ウェットエッチングの組成物に対して、10wt%まで含まれ、
前記緩衝剤は、前記ウェットエッチングの組成物に対して、30wt%まで含まれ、
前記2次酸化剤は、前記ウェットエッチングの組成物に対して、30wt%まで含まれ、
前記高分子は、前記ウェットエッチングの組成物に対して、5wt%まで含まれることを特徴とする請求項1に記載のウェットエッチングの組成物。 - 前記希釈剤である脱イオン水をさらに含むことを特徴とする請求項15に記載のウェットエッチングの組成物。
- 少なくとも一つのブリッジ支持構造により支持され、積層されたSiブリッジ層とSiGe層とを有する構造を提供する段階と、
前記SiGeブリッジ層の両側に、SiGeをエッチングするエッチング組成物を適用する段階と、を含み、
前記エッチング組成物は、
PAAと、
フッ化酸と、
CMOS素子のPMOSトランジスタのためのSiGe:Siのエッチング速度と実質的に同一な、CMOS素子のNMOSトランジスタのためのSiGe:Siのエッチング速度を確保するのに十分な組成での前記PAAの相対的な量と、を含み、
前記PAAの相対的な量は、1.0wt%ないし50wt%の範囲であることを特徴とする多重ブリッジチャンネルのFETを有する半導体素子の製造方法。 - 基板を提供する段階と、
前記基板上に、SiGe層とSi層とを反復して交互に積層する段階と、
前記積層された構造の両側面を露出させる段階と、
前記SiGeブリッジ層の両側面にSiGeをエッチングするエッチング組成物を適用する段階と、を含み、
前記エッチング組成物は、
PAAと、
フッ化酸と、
実質的に、CMOS素子のPMOSトランジスタのためのSiGe:Siのエッチング速度と同一な、CMOS素子のNMOSトランジスタのためのSiGe:Siのエッチング速度を確保するのに十分な前記組成物において、前記PAAの相対的な量と、を含み、
前記PAAの相対的な量は、1.0wt%ないし50wt%の範囲であることを特徴とするシリコン層の間からSiGeを除去する方法。 - 導電性領域を含む基板を提供する段階と、
前記基板上にSiGe層を形成する段階と、
前記基板内の導電性領域を露出させるために、SiGe層の内にストレージノードホールを形成する段階と、
前記露出された基板の導電性領域と前記SiGe層の上に、Si層を形成する段階と、
前記Si層上に絶縁層を形成する段階と、
前記絶縁層と前記Si層の一部を選択的に除去して、ストレージ電極を定義する段階と、
請求項1のウェットエッチング組成物をSiGe層の側面に適用する段階と、を含むことを特徴とする半導体キャパシタの製造方法。 - 基板の表面上に、SiGeブリッジ間の層とSiブリッジ層とが、互いに交互に積層された活性パターンが形成される部分を形成する段階と、
前記活性パターンが形成される部分の反対になる両端の基板上に、ソース/ドレイン領域を形成する段階と、
前記複数個のブリッジ間の層を、前記ブリッジ間の層を含む複数個のブリッジとトンネルを含む活性チャンネルパターンとを定義する活性パターンが形成される部分が通過する複数個のトンネルを形成するために、請求項1のウェットエッチング組成物を用いて選択的に除去する段階と、
ゲート電極を形成する段階と、を含むことを特徴とするCMOS FET集積回路の製造方法。 - 前記ソース/ドレインを形成する段階は、
前記活性パターンが形成される部分が、互いに分離されるようにエッチングする段階と、
前記エッチングされた領域内に、ソース/ドレイン領域を形成する段階と、を含むことを特徴とする請求項20に記載のCMOS FET集積回路の製造方法。 - 前記活性パターンが形成される部分がエッチングで分離される段階は、前記活性パターンが形成される部分の第1及び第2反対面を定義するための活性パターンが形成される部分をエッチングする段階を含み、
前記ソース/ドレイン領域を形成する段階は、前記第1及び第2反対面のそれぞれにソース/ドレイン領域を形成する段階を含み、
前記選択的に除去する段階は、第3及び第4側面から活性パターンが形成される部分を通過する複数個のトンネルを形成するための、複数個のブリッジ間の層を選択的に除去する段階を含み、
前記ゲート電極を形成する段階は、前記第3及び第4側面上の前記複数個のブリッジを取り囲み、前記トンネルを通じて拡張されるゲート電極を形成する段階を含むことを特徴とする請求項21に記載のCMOS FET集積回路の製造方法。 - 前記活性パターンが形成される部分を形成する段階は、3つのブリッジ層と2つのブリッジ間の層とを含み、それぞれ3つのブリッジ層の一つにそれぞれ隣接する活性パターンが形成される部分を形成する段階を含むことを特徴とする請求項20に記載のCMOS FET集積回路の製造方法。
- 前記ゲート電極を形成する段階は、前記ブリッジを取り囲み、前記トンネルを充填するゲート電極を形成する段階を含むことを特徴とする請求項20に記載のCMOS FET集積回路の製造方法。
- 前記活性パターンが形成される領域を形成する段階は、
前記基板上に、多重ブリッジ領域を定義する層パターンを形成する段階と、
前記多重ブリッジ領域内に、前記基板の表面にそれぞれ交互にブリッジ間の層とブリッジ層とを積層するために、選択的にエピタキシャル成長を行う段階と、を含むことを特徴とする請求項20に記載のCMOS FET集積回路の製造方法。 - 前記ブリッジ間の層と前記ブリッジ層とを形成する前に、前記多重ブリッジ領域内に前記基板にイオン注入を行う段階をさらに含むことを特徴とする請求項25に記載のCMOS FET集積回路の製造方法。
- 前記エッチングする段階は、
前記活性パターンが形成される領域上に、ゲート領域を定義するダミーゲートパターンを形成する段階と、
前記ゲートパターンをエッチングマスクとして使用して、前記基板の表面が露出されるまで、前記活性パターンが形成される部分をエッチングする段階と、を含むことを特徴とする請求項21に記載のCMOS FET集積回路の製造方法。 - 前記選択的に除去する段階以前に、
前記ソース/ドレイン領域、前記基板及び前記活性パターンが形成される部分上にマスク層を形成する段階と、
前記ダミーゲートパターンを露出させるマスクパターンを形成するために、前記ダミーゲートパターンが露出されるまで前記マスク層を平坦化する段階と、
前記マスクパターンを利用したゲートトレンチを形成するために、前記ダミーゲートパターンを除去する段階と、
前記マスクパターンを使用して、前記活性パターンが形成される部分の側面を露出させる段階と、を含むことを特徴とする請求項27に記載のCMOS FET集積回路の製造方法。 - 前記活性パターンが形成される部分を形成する段階に先行して、前記基板のドーピングされた部分を形成するためにイオンを注入する段階をさらに含み、
前記活性パターンが形成される部分を形成する段階は、前記基板のドーピングされた部分上に前記活性パターンが形成される部分を形成する段階を含むことを特徴とする請求項21に記載のCMOS FET集積回路の製造方法。 - 前記活性パターンが形成される部分の分離された領域は、イオン注入の突出された領域の下部をエッチングすることを特徴とする請求項29に記載のCMOSFET集積回路の製造方法。
- 前記複数個のブリッジ間の層を選択的に除去する前に、前記活性パターンが形成される部分上に、チャンネルのイオン注入を行うことをさらに含むことを特徴とする請求項20に記載のCMOS FET集積回路の製造方法。
- 前記チャンネルのイオン注入が行われ、前記ブリッジ層のそれぞれは、相異なるドーピング濃度を有することを特徴とする請求項31に記載のCMOS FET集積回路の製造方法。
- 前記ゲート電極を形成する段階以前に、
前記ブリッジ層を取り囲むために、前記ブリッジの表面上にゲート絶縁膜を形成する段階をさらに含むことを特徴とする請求項20に記載のCMOS FET集積回路の製造方法。 - 前記ゲート絶縁膜を形成する以前に、水素またはアルゴン雰囲気で熱処理を行う段階をさらに含むことを特徴とする請求項33に記載のCMOS FET集積回路の製造方法。
- 前記活性パターンが形成される部分のブリッジ間の層が形成され、前記表面に最も近いブリッジ間の層は、残りのブリッジ間の層より厚いことを特徴とする請求項20に記載のCMOS FET集積回路の製造方法。
- 半導体基板上に、導電性パッドを有する層間絶縁膜を形成する段階と、
前記層間絶縁膜上にエッチング阻止膜を形成する段階と、
前記エッチング阻止膜上に第1 SiGe型枠層を形成する段階と、
前記第1型枠層上にストレージノード開口部を形成する段階と、
前記開口部の側壁、底面及び前記第1型枠層上にSi導電層を形成する段階と、
前記導電層上に第2 SiGe型枠層を形成する段階と、
前記第1型枠層が露出されるまで、前記結果物を平坦化する段階と、
前記導電層の側壁部分を露出させるために、請求項1のウェットエッチング組成物を利用して、前記第1及び第2型枠層の上部を部分的に除去する段階と、
前記露出された側壁部分を薄くする段階と、
前記第1及び第2型枠層の残余部分を除去する段階と、を含むことを特徴とする半導体素子のキャパシタ電極の形成方法。 - 前記上部を除去する段階と、前記露出された側壁部分を薄くする段階とは、一回以上反復されることを特徴とする請求項36に記載の半導体素子のキャパシタ電極の形成方法。
- 前記薄くする段階は、ウェットエッチングを含むことを特徴とする請求項36に記載の半導体素子のキャパシタ電極の形成方法。
- 前記ウェットエッチングは、SC1を使用することを含むことを特徴とする請求項38に記載の半導体素子のキャパシタ電極の形成方法。
- 前記薄くする段階は、前記側壁の両面をエッチングすることを特徴とする請求項38に記載の半導体素子のキャパシタ電極の形成方法。
- 前記薄くする段階は、前記側壁の内側壁と外側壁の上に第1及び第2階段形態をそれぞれ形成する段階を含み、
前記第1及び第2階段は、実質的に対称であることを特徴とする請求項36に記載の半導体素子のキャパシタ電極の形成方法。 - 前記導電層上に誘電膜を形成する段階と、
前記誘電膜上に上部電極を形成する段階と、をさらに含むことを特徴とする請求項36に記載の半導体素子のキャパシタ電極の形成方法。
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JP2002353443A (ja) | 2001-05-23 | 2002-12-06 | Matsushita Electric Ind Co Ltd | 半導体装置の製造方法 |
KR100391984B1 (ko) * | 2001-08-08 | 2003-07-22 | 삼성전자주식회사 | 다층 터널접합층 패턴을 갖는 반도체 기억소자 및 그제조방법 |
JP2003183652A (ja) | 2001-12-19 | 2003-07-03 | Alps Electric Co Ltd | エッチング剤 |
JP3793808B2 (ja) * | 2002-05-02 | 2006-07-05 | 国立大学法人東京工業大学 | 電界効果トランジスタの製造方法 |
US7176041B2 (en) * | 2003-07-01 | 2007-02-13 | Samsung Electronics Co., Ltd. | PAA-based etchant, methods of using same, and resultant structures |
JP2005079517A (ja) | 2003-09-03 | 2005-03-24 | Matsushita Electric Ind Co Ltd | Mos型電界効果トランジスタの製造方法 |
-
2004
- 2004-10-29 US US10/976,161 patent/US7176041B2/en not_active Expired - Lifetime
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2005
- 2005-03-17 DE DE102005012356A patent/DE102005012356B4/de active Active
- 2005-04-02 KR KR1020050027799A patent/KR100652407B1/ko active IP Right Grant
- 2005-04-08 JP JP2005112763A patent/JP4777683B2/ja active Active
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2006
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Publication number | Publication date |
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US7176041B2 (en) | 2007-02-13 |
DE102005012356B4 (de) | 2009-09-17 |
DE102005012356A1 (de) | 2005-10-27 |
JP2005303305A (ja) | 2005-10-27 |
KR20060045451A (ko) | 2006-05-17 |
US20050169096A1 (en) | 2005-08-04 |
KR100652407B1 (ko) | 2006-12-01 |
US7709277B2 (en) | 2010-05-04 |
US20070111532A1 (en) | 2007-05-17 |
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