JP2010521817A - 複数のチャネル領域を互いに異なる高さに備える電子デバイス、およびその製造方法 - Google Patents
複数のチャネル領域を互いに異なる高さに備える電子デバイス、およびその製造方法 Download PDFInfo
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Abstract
Description
また図面上の各要素は簡単かつ明確にするために示され、必ずしも正しい縮尺で描かれていないことを、当業者には理解されたい。本発明の実施形態をより理解し易くするために、たとえば図面上の要素のうち、ある要素の大きさが他の要素よりも誇張して描かれている。
Claims (20)
- 不揮発性メモリセルを備える電子デバイスの製造方法であって、前記製造方法は、
基板上に電荷ストレージスタックを形成する電荷ストレージスタック形成工程と;
前記電荷ストレージスタック上に制御ゲート電極を形成する制御ゲート電極形成工程と;
前記制御ゲート電極の形成後に、前記制御ゲート電極から離間させて、前記基板上に半導体層を形成する半導体層形成工程と;
前記半導体層上に選択ゲート電極を形成する選択ゲート電極形成工程と
を含む、電子デバイスの製造方法。 - 前記製造方法は更に、前記制御ゲート電極形成工程の後、かつ前記半導体層形成工程の前に、絶縁スペーサを形成する絶縁スペーサ形成工程を含む、請求項1記載の製造方法。
- 前記絶縁スペーサ形成工程は、
前記制御ゲート電極上と前記基板上に絶縁層を形成する工程と;
前記絶縁スペーサを形成するために、前記絶縁層を異方的にエッチングする工程と
を含む、請求項2記載の製造方法。 - 前記選択ゲート電極形成工程は、
前記制御ゲート電極上、前記絶縁スペーサ上、および前記半導体層上に、選択ゲート電極層を形成する工程と;
側壁スペーサを形成するために、前記選択ゲート電極層を異方的にエッチングする工程と;
前記選択ゲート電極を形成するために、前記側壁スペーサの一部を除去する工程と
を含む、請求項2記載の製造方法。 - 前記半導体層形成工程は、前記基板上に前記半導体層を選択的に形成する工程を含む、請求項1記載の製造方法。
- 前記半導体層形成工程は、前記基板から前記半導体層を選択的にエピタキシャル成長させる工程を含む、請求項5記載の製造方法。
- 前記電荷ストレージスタック形成工程は、
前記基板上に第1ゲート誘電体層を形成する第1ゲート誘電体層形成工程と;
前記第1ゲート誘電体層上に互いに不連続な複数の記憶素子を形成する工程と
を含む、請求項1記載の製造方法。 - 前記製造方法は更に、前記選択ゲート電極形成工程の前に、前記半導体層上に前記第1ゲート誘電体層よりも薄い第2ゲート誘電体層を形成する第2ゲート誘電体層形成工程を含む、請求項7記載の製造方法。
- 前記半導体層形成工程は、
前記基板に隣接する第1表面と、前記第1表面の反対側にある第2表面とを有するように前記半導体層を形成する工程を含み、前記第2表面は第1高さであり、
前記制御ゲート電極形成工程は、前記基板に隣接する第3表面と、前記第3表面の反対側の第4表面とを有するように前記制御ゲート電極を形成する工程を含み、前記第3表面は、前記第1高さと少なくとも同じ高さの第2高さにある、請求項7記載の製造方法。 - 前記第1ゲート誘電体層形成工程は、
前記基板に隣接する第5表面と、前記第5表面の反対側の第6表面とを有するように前記第1ゲート誘電体層を形成する工程を含み、前記第6表面は第3高さであり、
前記第1高さは、前記第2高さと前記第3高さの間にある、請求項9記載の製造方法。 - 不揮発性メモリセルを備える電子デバイスの製造方法であって、
基板上に第1ゲート誘電体層を形成する第1ゲート誘電体層形成工程と;
前記第1ゲート誘電体層上に、互いに不連続な複数の記憶素子を形成する記憶素子形成工程と;
前記不連続の記憶素子上に、制御ゲート電極を形成する制御ゲート電極形成工程と;
前記制御ゲート電極の形成後に、前記不連続の記憶素子の露出部分を除去する記憶素子除去工程と;
前記制御ゲート電極に隣接して絶縁スペーサを形成する絶縁スペーサ形成工程と;
前記絶縁スペーサの形成後に、前記基板の露出部分から選択的に半導体層を成長させる半導体層成長工程と;
前記半導体層上に第2ゲート誘電体層を形成する第2ゲート誘電体層形成工程と;
前記第2ゲート誘電体層上に選択ゲート電極を形成する選択ゲート電極形成工程と
を含み、
前記半導体層は、前記基板から最も離れてかつ第1高さにある第1表面を有し、
前記制御ゲート電極は、前記基板に最も近くてかつ第2高さにある第2表面を有し、
前記第1ゲート誘電体層は、前記基板から最も離れてかつ第3高さにある第3表面を有し、
前記第1高さは、前記第2高さと前記第3高さの間にある、製造方法。 - 前記制御ゲート電極形成工程は、
前記不連続の記憶素子上に制御ゲート電極層を形成する工程と;
前記制御ゲート電極層上に窒素含有層を形成する工程と;
前記窒素含有層上にマスクを形成する工程と;
前記窒素含有層をパターニングする工程と;
前記制御ゲート電極を形成するために、前記制御ゲート電極層をパターニングする工程と
を含み、
前記選択ゲート電極形成工程は、
前記制御ゲート電極上、前記絶縁スペーサ上、および前記半導体層上に、選択ゲート電極層を形成する工程と;
前記選択ゲート電極を形成するために、マスクを使用せずに前記選択ゲート電極層を異方的にエッチングする工程と
を含む、請求項11記載の製造方法。 - 前記第1ゲート誘電体層は、前記第2ゲート誘電体層よりも厚い、請求項11記載の製造方法。
- 前記半導体層成長工程は、前記半導体層をエピタキシャル成長させる工程を含む、請求項13記載の製造方法。
- 不揮発性メモリセルを備える電子デバイスであって、
第1部分と第2部分を含む基板であって、前記第1部分の第1主面は、前記第2部分の第2主面よりも低い位置にあることと;
前記第1部分上にあり、かつ互いに不連続な複数の記憶素子を含む電荷ストレージスタックと;
前記第1部分上にある制御ゲート電極と;
前記第2部分上にあり、かつ側壁スペーサを含む選択ゲート電極と
を備えることを特徴とする、電子デバイス。 - 前記電子デバイスは更に、前記制御ゲート電極と前記選択ゲート電極の間に位置する絶縁スペーサを備える、請求項15記載の電子デバイス。
- 前記電子デバイスは更に、
前記制御ゲート電極と前記基板の前記第1部分との間に位置する第1ゲート誘電体層と;
前記選択ゲート電極と前記基板の前記第2部分との間に位置する第2ゲート誘電体層と
を備え、前記第2ゲート誘電体層は前記第1ゲート誘電体層よりも薄い、請求項15記載の電子デバイス。 - 前記電子デバイスは更に、
前記制御ゲート電極に隣接する第1ソースドレイン領域と;
前記選択ゲート電極に隣接する第2ソースドレイン領域と
を備える、請求項15記載の電子デバイス。 - 前記不連続の記憶素子はいずれも、前記制御ゲート電極と前記選択ゲート電極の間には存在しない、請求項15記載の電子デバイス。
- 前記不連続の記憶素子はいずれも、前記基板の前記第2部分上には存在しない、請求項19記載の電子デバイス。
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US11/685,297 US8803217B2 (en) | 2007-03-13 | 2007-03-13 | Process of forming an electronic device including a control gate electrode, a semiconductor layer, and a select gate electrode |
PCT/US2008/053569 WO2008112370A1 (en) | 2007-03-13 | 2008-02-11 | Electronic device including channel regions lying at different elevations and processes of forming the same |
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US (1) | US8803217B2 (ja) |
EP (1) | EP2126977A4 (ja) |
JP (1) | JP2010521817A (ja) |
KR (1) | KR20090128413A (ja) |
CN (1) | CN101647122B (ja) |
TW (1) | TWI424571B (ja) |
WO (1) | WO2008112370A1 (ja) |
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KR101923773B1 (ko) | 2016-07-13 | 2018-11-29 | 타이완 세미콘덕터 매뉴팩쳐링 컴퍼니 리미티드 | 반도체 디바이스 및 그 제조 방법 |
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US20120074485A1 (en) * | 2009-12-30 | 2012-03-29 | Hynix Semiconductor Inc. | Nonvolatile Memory Device and Manufacturing Method Thereof |
JP6297430B2 (ja) * | 2014-06-30 | 2018-03-20 | ルネサスエレクトロニクス株式会社 | 半導体装置およびその製造方法 |
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CN101647122A (zh) | 2010-02-10 |
US20080227254A1 (en) | 2008-09-18 |
KR20090128413A (ko) | 2009-12-15 |
EP2126977A1 (en) | 2009-12-02 |
WO2008112370A1 (en) | 2008-09-18 |
US8803217B2 (en) | 2014-08-12 |
CN101647122B (zh) | 2011-09-28 |
TWI424571B (zh) | 2014-01-21 |
EP2126977A4 (en) | 2010-09-29 |
TW200901483A (en) | 2009-01-01 |
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