JP5168935B2 - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- JP5168935B2 JP5168935B2 JP2007040323A JP2007040323A JP5168935B2 JP 5168935 B2 JP5168935 B2 JP 5168935B2 JP 2007040323 A JP2007040323 A JP 2007040323A JP 2007040323 A JP2007040323 A JP 2007040323A JP 5168935 B2 JP5168935 B2 JP 5168935B2
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- insulating film
- film
- semiconductor device
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- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
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Description
本発明の実施の形態について説明する前に、本発明に至るまでの経緯について説明する。
図10〜図49は、本発明の第1実施形態に係る半導体ウエハ構造の製造途中の断面図である。
・ソースパワー(周波数13.56MHz):約2000W
・バイアスパワー(周波数13.56MHz):約1000W
・反応圧力:約10mTorr
・ガス流量:C4F8…20sccm、O2…12sccm、Ar…500sccm、
・エッチング速度:500nm/分
また、スパッタエッチングは、ICP型エッチング装置を用いて次の条件で行うことができる:
・ソースパワー:約2000W
・バイアスパワー:約1000W
・反応圧力:約10mTorr
・アルゴン流量:約100sccm
・エッチング速度:500nm/分
一方、ウエットウエットエッチングは、0.5wt%のフッ酸溶液をエッチング液として用いて行われる。この濃度のフッ酸溶液では、酸化シリコンよりなる第1絶縁膜25は100〜300nm/分のエッチング速度でエッチングされる。
・ソースパワー:約2000W
・バイアスパワー:約1000W
・反応圧力:約10mTorr
・アルゴン流量:約100sccm
・エッチング速度:500nm/分
一方、RIEでは、例えばC4F8、O2、及びArの混合ガスをエッチングガスとして用い、ICP型エッチング装置において次のエッチング条件が採用される:
・ソースパワー(周波数13.56MHz):約2000W
・バイアスパワー(周波数13.56MHz):約1000W
・反応圧力:約10mTorr
・ガス流量:C4F8…20sccm、O2…12sccm、Ar…500sccm、
・エッチング速度:500nm/分
なお、このようなエッチングに代えて、第1絶縁膜25の上面に対してCMP(Chemical Mechanical Polishing)を施すことにより段差部Aの面取りを行ってもよい。
上記した第1実施形態では、第1〜第3絶縁膜25、35、48の肉厚部25x、35x、48xをエッチングする際、マスクとして第1、第2、第5レジストパターン23、36、47を用いた。
図54は、本例で使用される露光装置100の構成図である。
図55は、本例で使用される露光装置105の構成図である。
図56は、本例におけるレジストパターンの形成方法について示す斜視図である。
第1実施形態では、第1絶縁膜25に対してCMPを行い(図2(a))、次いで第1絶縁膜25の肉厚部25xを薄くした(図10(b))。
第1実施形態では、FeRAMのキャパシタ誘電体膜26aが水分で還元されるのを防止すべく、膜中の水分量が低減されるような成膜条件で第1〜第3絶縁膜25、35、48を形成したため、これらの絶縁膜25、35、48は周辺領域Iにおいて厚く形成された。
前記絶縁膜のうち、膜厚が基準値よりも厚い肉厚部を選択的に薄くする工程と、
前記薄くされた部分の絶縁膜にホールを形成する工程と、
前記ホール内に導電性プラグを形成する工程と、
を有することを特徴とする半導体装置の製造方法。
前記レジストパターンで覆われずに露出している前記肉厚部を選択的にエッチングする工程と、
前記レジストパターンを除去する工程とを有することを特徴とする付記1に記載の半導体装置の製造方法。
レジストパターンは、前記半導体基板の前記中心領域を覆う円形の平面形状を有することを特徴とする付記2に記載の半導体装置の製造方法。
前記絶縁膜の上にポジ型フォトレジストを塗布する工程と、
前記ポジ型フォトレジストの上方に、前記半導体基板よりも平面サイズが小さな遮蔽板を置きながら、前記遮蔽板の上方から露光光を照らして、前記遮蔽板からはみ出た該露光光により前記ポジ型フォトレジストの前記周辺領域のみを露光する工程と、
前記ポジ型フォトレジストを現像して前記レジストパターンにする工程とを有することを特徴とする付記4に記載の半導体装置の製造方法。
前記絶縁膜の上にネガ型フォトレジストを形成する工程と、
前記ネガ型フォトレジストの上方に、該ネガ型フォトレジストの前記中心領域に選択的に露光光を通す開口を備えた遮蔽板を置きながら、前記ネガ型フォトレジストの前記中心領域のみを選択的に露光する工程と、
前記ネガ型フォトレジストを現像して前記レジストパターンにする工程とを有することを特徴とする付記4に記載の半導体装置の製造方法。
前記絶縁膜の上にフォトレジストを形成する工程と、
前記半導体基板を回転させながら、前記周辺領域におけるフォトレジストに溶剤を滴下することにより、前記周辺領域における前記フォトレジストを選択的に除去して前記レジストパターンとする工程とを有することを特徴とする付記4に記載の半導体装置の製造方法。
前記レジストパターンは、前記周縁領域を覆う輪帯状の平面形状を有することを特徴とする付記2に記載の半導体装置の製造方法。
前記ホールを形成する工程において、前記キャップ絶縁膜にも該ホールを形成することを特徴とする付記1に記載の半導体装置の製造方法。
前記ホールを形成する工程において、前記不純物拡散領域の上に該ホールを形成すると共に、
前記導電性プラグを形成する工程において、該導電性プラグを前記不純物拡散領域と電気的に接続することを特徴とする付記1に記載の半導体装置の製造方法。
前記絶縁膜を形成する工程において、前記金属配線の上に該絶縁膜を形成し、
前記ホールを形成する工程において、前記金属配線の上の前記絶縁膜に該ホールを形成すると共に、
前記導電性プラグを形成する工程において、該導電性プラグを前記金属配線と電気的に接続することを特徴とする付記1に記載の半導体装置の製造方法。
前記半導体基板の上方に形成され、上面に段差部を備えた絶縁膜と、
前記絶縁膜のホールに形成された導電性プラグとを有し、
前記絶縁膜の全体が前記段差部を境にして二つの領域に分けられ、且つ、該二つの領域のうち、前記段差部から見て前記絶縁膜の膜厚が薄い方の領域に前記ホールが形成されたことを特徴とする半導体装置。
前記半導体基板の上方に形成され、上面に段差部を備えた絶縁膜と、
前記絶縁膜のホールに形成された導電性プラグとを有し、
前記段差部が、前記半導体基板と同心円をなす円形であることを特徴とする半導体ウエハ構造。
最外周の前記チップ領域と、これに隣接するチップ領域の少なくとも一つとが、前記段差部に重なることを特徴とする付記19に記載の半導体ウエハ構造。
Claims (6)
- 半導体基板の上方に絶縁膜を形成する工程と、
前記絶縁膜の上面全体をCMPにより研磨する工程と、
研磨された前記絶縁膜のうち、第1の領域にレジストパターンを形成する工程と、
前記第1の領域よりも前記絶縁膜の膜厚が厚い第2の領域の前記絶縁膜を前記レジストパターンをマスクに用いて選択的にエッチングして薄くする工程と、
前記第2の領域の前記絶縁膜を薄くする工程の後に、前記レジストパターンを除去する工程と、
前記レジストパターンを除去する工程の後に、前記薄くされた部分の前記絶縁膜にホールを形成する工程と、
前記ホール内に導電性プラグを形成する工程と
を有することを特徴とする半導体装置の製造方法。 - 研磨された前記絶縁膜は、前記半導体基板の中心領域から周辺領域に向かって膜厚が増大し、
前記レジストパターンは、前記半導体基板の前記中心領域を覆う円形の平面形状を有することを特徴とする請求項1に記載の半導体装置の製造方法。 - 前記絶縁膜は、TEOSガスと酸素ガスとの混合ガスを使用し、且つ、前記酸素の流量を、前記TEOSガスを酸化するのに必要な量よりも多くするプラズマCVD法により形成されることを特徴とする請求項2に記載の半導体装置の製造方法。
- 前記レジストパターンを除去した後、前記第2の領域の前記絶縁膜をエッチングして薄くする工程において前記絶縁膜の上面に形成された段差部を面取りする工程を更に有することを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記レジストパターンを除去する工程の後に、前記絶縁膜の上にキャップ絶縁膜を形成する工程を更に有し、
前記ホールを形成する工程において、前記キャップ絶縁膜にも前記ホールを形成することを特徴とする請求項1に記載の半導体装置の製造方法。 - 下部電極、強誘電体材料よりなるキャパシタ誘電体膜、及び上部電極を備えたキャパシタを形成する工程を更に有することを特徴とする請求項1に記載の半導体装置の製造方法。
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JP2007040323A JP5168935B2 (ja) | 2007-02-21 | 2007-02-21 | 半導体装置の製造方法 |
US12/034,976 US8008189B2 (en) | 2007-02-21 | 2008-02-21 | Semiconductor device manufacturing method, semiconductor device, and semiconductor wafer structure |
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JP2007040323A JP5168935B2 (ja) | 2007-02-21 | 2007-02-21 | 半導体装置の製造方法 |
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JP5168935B2 true JP5168935B2 (ja) | 2013-03-27 |
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EP2053146B1 (en) * | 2006-08-07 | 2016-08-31 | Seiko Instruments Inc. | Method for manufacturing electroformed mold, electroformed mold, and method for manufacturing electroformed parts |
US8187897B2 (en) * | 2008-08-19 | 2012-05-29 | International Business Machines Corporation | Fabricating product chips and die with a feature pattern that contains information relating to the product chip |
JP5875368B2 (ja) | 2011-12-28 | 2016-03-02 | キヤノン株式会社 | 半導体装置の製造方法 |
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JPS63272035A (ja) * | 1987-04-30 | 1988-11-09 | Oki Electric Ind Co Ltd | 基板周辺のレジスト除去方法 |
US5356722A (en) * | 1992-06-10 | 1994-10-18 | Applied Materials, Inc. | Method for depositing ozone/TEOS silicon oxide films of reduced surface sensitivity |
JPH09246492A (ja) * | 1996-03-13 | 1997-09-19 | Toshiba Corp | 半導体記憶装置およびその製造方法 |
JP3194037B2 (ja) * | 1996-09-24 | 2001-07-30 | 東京エレクトロン株式会社 | 枚葉回転処理方法及びその装置 |
JP3556437B2 (ja) | 1997-07-25 | 2004-08-18 | 株式会社ルネサステクノロジ | 半導体集積回路装置の製造方法 |
JPH1167767A (ja) * | 1997-08-20 | 1999-03-09 | Sony Corp | 半導体装置の製造方法 |
JPH11297694A (ja) * | 1998-04-07 | 1999-10-29 | Sony Corp | 半導体装置の製造方法 |
JP3644887B2 (ja) * | 2000-04-11 | 2005-05-11 | 松下電器産業株式会社 | 半導体装置およびその製造方法 |
JP3570354B2 (ja) | 2000-07-28 | 2004-09-29 | 三菱住友シリコン株式会社 | 半導体ウェーハ上への成膜方法及び半導体ウェーハ |
JP3917355B2 (ja) * | 2000-09-21 | 2007-05-23 | 株式会社東芝 | 半導体装置およびその製造方法 |
GB2378314B (en) * | 2001-03-24 | 2003-08-20 | Esm Ltd | Process for forming uniform multiple contact holes |
JP2002334927A (ja) * | 2001-05-11 | 2002-11-22 | Hitachi Ltd | 半導体装置の製造方法 |
US6767825B1 (en) * | 2003-02-03 | 2004-07-27 | United Microelectronics Corporation | Etching process for forming damascene structure of the semiconductor |
KR100532427B1 (ko) * | 2003-03-27 | 2005-11-30 | 삼성전자주식회사 | 강유전체 메모리 소자의 제조 방법 |
JP2005087802A (ja) * | 2003-09-12 | 2005-04-07 | Seiko Epson Corp | 液滴吐出装置、膜構造体の製造方法および膜構造体、デバイスおよび電子機器 |
KR100519250B1 (ko) * | 2003-12-04 | 2005-10-06 | 삼성전자주식회사 | 반도체 소자의 금속배선용 패턴 형성방법 |
US6979641B2 (en) * | 2004-03-19 | 2005-12-27 | Micron Technology, Inc. | Methods of forming a conductive contact through a dielectric |
US7189650B2 (en) * | 2004-11-12 | 2007-03-13 | Taiwan Semiconductor Manufacturing Co., Ltd. | Method and apparatus for copper film quality enhancement with two-step deposition |
JP4679277B2 (ja) * | 2005-07-11 | 2011-04-27 | 富士通セミコンダクター株式会社 | 半導体装置の製造方法 |
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