JP2006013485A - 線幅の狭い半導体素子の製造方法 - Google Patents
線幅の狭い半導体素子の製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 74
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 74
- 238000005530 etching Methods 0.000 claims abstract description 66
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 56
- 239000010703 silicon Substances 0.000 claims abstract description 56
- 230000002093 peripheral effect Effects 0.000 claims abstract description 42
- 229920002120 photoresistant polymer Polymers 0.000 claims abstract description 33
- 239000000758 substrate Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 32
- 238000007740 vapor deposition Methods 0.000 claims description 13
- 229920000642 polymer Polymers 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 abstract 1
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- 239000007789 gas Substances 0.000 description 19
- 230000015572 biosynthetic process Effects 0.000 description 7
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- 239000000203 mixture Substances 0.000 description 6
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- 238000013461 design Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- WQJQOUPTWCFRMM-UHFFFAOYSA-N tungsten disilicide Chemical compound [Si]#[W]#[Si] WQJQOUPTWCFRMM-UHFFFAOYSA-N 0.000 description 2
- 229910021342 tungsten silicide Inorganic materials 0.000 description 2
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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Abstract
【解決手段】セル領域及び周辺領域が画定された基板200上にシリコン窒化膜201Aを形成する工程、シリコン窒化膜上に反射防止膜としてシリコン酸窒化膜202Aを形成する工程、セル領域では最終パターンの線幅W1Aより広い幅W1を有し、周辺領域ではパターンの崩れの発生を抑える最小の線幅W2を有するようにシリコン酸窒化膜上にフォトレジストパターン203を形成する工程、フォトレジストパターンをエッチングマスクとしてシリコン酸窒化膜とシリコン窒化膜とをエッチングする処理を、残留するシリコン酸窒化膜202Bとシリコン窒化膜201Bとの線幅W1A,W2Bがフォトレジストパターンの線幅W1,W2に比べて狭くなるまで行う工程、及び残留するシリコン窒化膜を過度エッチングする工程を含む。
【選択図】 図3B
Description
201A シリコン窒化膜
202A シリコン酸窒化膜
201B パターニングされたシリコン窒化膜
202B パターニングされたシリコン酸窒化膜
203 フォトレジストパターン
300 基板
301A ゲート導電膜
302A シリコン窒化膜
303A シリコン酸窒化膜
301B パターニングされたゲート導電膜
302B パターニングされたシリコン窒化膜
303B パターニングされたシリコン酸窒化膜
304 フォトレジストパターン
W1 セル領域におけるDICD
W1A セル領域におけるFICD
W2 周辺領域におけるDICD
W2A 周辺領域におけるFICD
A セル領域
B 周辺領域
Claims (12)
- セル領域及び周辺領域が画定された基板上に蒸着によってシリコン窒化膜を形成する第1ステップ、
前記シリコン窒化膜上に蒸着によって反射防止膜としてシリコン酸窒化膜を形成する第2ステップ、
前記セル領域では最終パターンの線幅より広い幅を有し、前記周辺領域ではパターンの崩れの発生を抑える最小の線幅を有するように前記シリコン酸窒化膜上に線状のフォトレジストパターンを形成する第3ステップ、
ポリマーの発生を抑制しながら、前記フォトレジストパターンをエッチングマスクとして前記シリコン酸窒化膜と前記シリコン窒化膜とを順次エッチングする処理を、エッチング後に残留する前記シリコン酸窒化膜と前記シリコン窒化膜との線幅が前記フォトレジストパターンの線幅に比べて狭くなるまで行う第4ステップ、及び
前記第4ステップの後に残留する前記シリコン窒化膜を過度エッチングする第5ステップを含む半導体素子の製造方法。 - 前記シリコン酸窒化膜と前記シリコン窒化膜とを順次エッチングする前記第4ステップと、残留する前記シリコン窒化膜を過度エッチングする前記第5ステップとにおいて、
エッチングガスにCHF3とCF4との混合ガスを用いることを特徴とする請求項1に記載の半導体素子の製造方法。 - 前記シリコン酸窒化膜と前記シリコン窒化膜とを順次エッチングする前記第4ステップにおいて、ウェハチャックの温度を約50℃以上に維持することを特徴とする請求項2に記載の半導体素子の製造方法。
- 前記第4ステップにおいて前記シリコン酸窒化膜をエッチングする際に、CHF3とCF4との混合比が、CF4を1としてCHF3が約1.1〜約1.6である混合ガスを使用することを特徴とする請求項3に記載の半導体素子の製造方法。
- 前記第4ステップにおいて前記シリコン窒化膜をエッチングする際に、CHF3とCF4との混合比が、CHF3を1としてCF4が約1.1〜約2である混合ガスを使用することを特徴とする請求項3または4に記載の半導体素子の製造方法。
- 残留する前記シリコン窒化膜を過度エッチングする前記第5ステップにおいて、CHF3とCF4との混合比が、CF4を1としてCHF3が約1.5〜約3である混合ガスを使用することを特徴とする請求項2に記載の半導体素子の製造方法。
- セル領域及び周辺領域が画定された基板上に蒸着によって導電膜を形成する第1ステップ、
前記導電膜上に蒸着によって絶縁性ハードマスクとしてシリコン窒化膜を形成する第2ステップ、
前記シリコン窒化膜上に蒸着によって反射防止膜としてシリコン酸窒化膜を形成する第3ステップ、
前記セル領域では最終パターンの線幅より広い幅を有し、前記周辺領域ではパターンの崩れの発生を抑える最小の線幅を有するように前記シリコン酸窒化膜上に線状のフォトレジストパターンを形成する第4ステップ、
ポリマーの発生を抑制しながら、前記フォトレジストパターンをエッチングマスクとして前記シリコン酸窒化膜と前記シリコン窒化膜とを順次エッチングする処理を、エッチング後に残留する前記シリコン酸窒化膜と前記シリコン窒化膜との線幅が前記フォトレジストパターンの線幅に比べて狭くなるまで行う第5ステップ、
前記第5ステップの後に残留する前記シリコン窒化膜を過度エッチングする第6ステップ、
前記フォトレジストパターンを除去する第7ステップ、
前記第7ステップの後に残留する前記シリコン酸窒化膜と前記シリコン窒化膜とをエッチングマスクとして前記導電膜をエッチングする第8ステップ、及び
前記第8ステップの後に残留する前記シリコン酸窒化膜を除去する第9ステップを含むことを特徴とする半導体素子の製造方法。 - 前記シリコン酸窒化膜と前記シリコン窒化膜とを順次エッチングする前記第5ステップと、残留する前記シリコン窒化膜を過度エッチングする前記第6ステップとにおいて、
エッチングガスにCHF3とCF4との混合ガスを用いることを特徴とする請求項7に記載の半導体素子の製造方法。 - 前記シリコン酸窒化膜と前記シリコン窒化膜とを順次エッチングする前記第5ステップにおいて、ウェハチャックの温度を約50℃以上に維持することを特徴とする請求項8に記載の半導体素子の製造方法。
- 前記第5ステップにおいて前記シリコン酸窒化膜をエッチングする際に、CHF3とCF4との混合比が、CF4を1としてCHF3が約1.1〜約1.6である混合ガスを使用することを特徴とする請求項9に記載の半導体素子の製造方法。
- 前記第5ステップにおいて前記シリコン窒化膜をエッチングする際に、CHF3とCF4との混合比が、CHF3を1としてCF4が約1.1〜約2である混合ガスを使用することを特徴とする請求項9または10に記載の半導体素子の製造方法。
- 残留する前記シリコン窒化膜を過度エッチングする前記第6ステップにおいて、CHF3とCF4との混合比が、CF4を1としてCHF3が約1.5〜約3である混合ガスを使用することを特徴とする請求項8に記載の半導体素子の製造方法。
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JP2008166714A (ja) * | 2007-01-04 | 2008-07-17 | Hynix Semiconductor Inc | 半導体素子の製造方法 |
US9442366B2 (en) | 2014-12-31 | 2016-09-13 | Macronix International Co., Ltd. | Layout pattern and photomask including the same |
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KR100706780B1 (ko) | 2004-06-25 | 2007-04-11 | 주식회사 하이닉스반도체 | 주변영역의 선폭을 줄일 수 있는 반도체 소자 제조 방법 |
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KR100780652B1 (ko) | 2006-12-27 | 2007-11-30 | 주식회사 하이닉스반도체 | 반도체 소자 제조방법 |
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JP2008166714A (ja) * | 2007-01-04 | 2008-07-17 | Hynix Semiconductor Inc | 半導体素子の製造方法 |
TWI571699B (zh) * | 2014-12-26 | 2017-02-21 | 旺宏電子股份有限公司 | 佈局圖案以及包含該佈局圖案的光罩 |
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Also Published As
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US20090253263A1 (en) | 2009-10-08 |
CN1722409A (zh) | 2006-01-18 |
TW200605200A (en) | 2006-02-01 |
US7179749B2 (en) | 2007-02-20 |
KR20050122737A (ko) | 2005-12-29 |
CN100345282C (zh) | 2007-10-24 |
TWI264065B (en) | 2006-10-11 |
US7803710B2 (en) | 2010-09-28 |
JP4771750B2 (ja) | 2011-09-14 |
US20050287809A1 (en) | 2005-12-29 |
US20070184664A1 (en) | 2007-08-09 |
KR100706780B1 (ko) | 2007-04-11 |
US7563721B2 (en) | 2009-07-21 |
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