JP2012501542A - 分離溝ライナを有する半導体デバイス、及び関連する製造方法 - Google Patents
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Abstract
半導体デバイス(300)を製造する方法がここに提供され、結果として得られる半導体デバイス(300)においては幅効果が低減されている。方法は、半導体材質(202)を有する基板(200)を提供することと、半導体材質(202)内に分離溝(212)を形成することと、その上への高k材質の形成を実質的に阻止するライナ材質(214)で分離溝(212)をライニングすることとを含む。内側を覆われた溝(216)は次いで絶縁材質(218)で充填される。その後、絶縁材質(218)の少なくとも一部分を覆い且つ半導体材質(202)の少なくとも一部分を覆うように高kゲート材質(232)の層が形成される。ライナ材質(214)は高kゲート材質(232)の層を分割し、それにより半導体材質(202)の能動領域上での酸素の泳動が防止される。
【選択図】図12
Description
Claims (20)
- 半導体デバイス構造(300)を製造する方法であって、
半導体材質(202)を有する基板(200)を提供することと、
前記半導体材質(202)内に分離溝(212)を形成することと、
その上への高k材質の形成を実質的に阻止するライナ材質(214)で前記分離溝(212)をライニングして内側を覆われた溝(216)をもたらすことと、
前記内側を覆われた溝(216)を少なくとも部分的に絶縁材質(218)で充填することと、
前記絶縁材質(218)の少なくとも一部分を覆い且つ前記半導体材質(202)の少なくとも一部分を覆う高kゲート材質(232)の層を、前記高kゲート材質(232)の層が前記ライナ材質(214)によって分割されるように形成することとを備えた方法。 - 前記内側を覆われた溝(216)を少なくとも部分的に充填することは、充填された分離溝(220)及び前記ライナ材質(214)の露出させられた縁(222)をもたらし、
前記高kゲート材質(232)の層を形成することは、前記ライナ材質(214)の前記露出させられた縁(222)が前記高kゲート材質(232)の空隙のまま実質的に残るように、前記充填された分離溝(220)の上に前記高kゲート材質(232)を堆積させることを備えている、請求項1の方法。 - 前記高kゲート材質(232)を覆い且つ前記ライナ材質(214)を覆うように金属ゲート層(234)を形成することを更に備えた、請求項2の方法。
- 前記金属ゲート層(234)を覆うように多結晶シリコンゲート層(236)を形成することを更に備えた、請求項3の方法。
- 前記分離溝(212)をライニングすることは前記分離溝(212)を窒化物材質でライニングすることを備えている、請求項1の方法。
- 前記内側を覆われた溝(216)を少なくとも部分的に充填することは、前記内側を覆われた溝(216)を少なくとも部分的に酸化物材質で充填することを備えている、請求項1の方法。
- その内部に画定される能動トランジスタ領域(308,310)を有する半導体材質(202)の層と、
前記能動トランジスタ領域(308,310)に隣接して前記半導体材質(202)の層内に形成される分離溝(212)と、
前記分離溝(212)をライニングする溝ライナ(214)であって内側を覆われた溝(216)を前記分離溝(212)と共に形成する溝ライナ(214)と、
前記内側を覆われた溝(216)内の絶縁材質(218)と、
前記絶縁材質(218)の少なくとも一部分を覆い且つ前記能動トランジスタ領域(308,310)の少なくとも一部分を覆うと共に前記溝ライナ(214)によって分割されている高kゲート材質(232)の層とを備えた半導体デバイス(300)。 - 前記溝ライナ(214)はその上への高k材質の核生成を実質的に阻止する材質を備えており、
前記高kゲート材質(232)の層は前記絶縁層(218)の上への及び前記能動トランジスタ領域(308,310)の上への堆積によって形成される、請求項7の半導体デバイス(300)。 - 前記溝ライナ(214)は前記絶縁材質(218)の前記一部分を覆う前記高kゲート材質(232)と前記能動トランジスタ領域(308,310)の前記一部分を覆う前記高kゲート材質(232)の間での酸素障壁を形成する、請求項7の半導体デバイス(300)。
- 前記溝ライナ(214)は上部縁(222)を含み、
前記上部縁(222)は実質的に前記高kゲート材質(232)の空隙である、請求項7の半導体デバイス(300)。 - 前記高kゲート材質(232)を覆い且つ前記溝ライナ(214)を覆う金属ゲート層(234)と、
前記金属ゲート層(234)を覆う多結晶シリコンゲート層(236)とを更に備えた、請求項7の半導体デバイス(300)。 - 前記溝ライナ(214)は窒化物材質から形成される、請求項7の半導体デバイス(300)。
- 前記絶縁材質(218)は酸化物材質である、請求項7の半導体デバイス(300)。
- 半導体デバイス構造(300)のための浅い溝分離の方法であって、
半導体材質(202)の層、前記半導体材質(202)の層を覆うパッド酸化物層(208)、及び前記パッド酸化物層(208)を覆うパッド窒化物層(210)を有する半導体基板(200)を提供することと、
前記パッド窒化物層(210)の一部分、前記パッド酸化物層(208)の一部分、及び前記半導体材質(202)の層の一部分の選択的な除去により前記半導体基板(200)内に分離溝(212)を形成することと、
その上への高k材質の核生成を実質的に阻害するライナ材質(214)を前記分離溝(212)内及び前記パッド窒化物層(210)の露出させられた部分上に堆積させることと、
絶縁材質(218)が前記分離溝(212)を充填するように前記絶縁材質(218)を前記ライナ材質(214)の上に堆積させることとを備えた方法。 - 前記パッド窒化物層(210)を覆っている前記ライナ材質(214)に概ね対応する高さまで前記絶縁材質(218)を研磨することを更に備えた、請求項14の方法。
- 前記パッド窒化物層(210)及び、前記ライナ材質(214)の一部分を除去し、実質的に損傷を受けさせずに前記絶縁材質(218)を残すことを更に備えた、請求項15の方法。
- 前記除去ステップは前記ライナ材質(214)の露出させられた上部縁(222)を形成する、請求項16の方法。
- 前記絶縁材質(218)を覆うように高kゲート材質(232)を堆積させることを更に備え、前記ライナ材質(214)の前記露出させられた上部縁(222)は前記高kゲート材質(232)の空隙で残る、請求項17の方法。
- 前記ライナ材質(214)は前記高kゲート材質(232)からの酸素の泳動を阻止する、請求項18の方法。
- 前記高kゲート材質(232)を覆い且つ前記ライナ材質(214)を覆うように金属ゲート層(234)を形成することと、
前記金属ゲート層(234)を覆うように多結晶シリコンゲート層(236)を形成することとを更に備えた、請求項18の方法。
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US12/199,616 US7998832B2 (en) | 2008-08-27 | 2008-08-27 | Semiconductor device with isolation trench liner, and related fabrication methods |
PCT/US2009/053271 WO2010025024A1 (en) | 2008-08-27 | 2009-08-10 | Semiconductor device with isolation trench liner, and related fabrication methods |
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US7998832B2 (en) | 2011-08-16 |
KR101810111B1 (ko) | 2017-12-18 |
US8217472B2 (en) | 2012-07-10 |
EP2324496A1 (en) | 2011-05-25 |
US20120223399A1 (en) | 2012-09-06 |
JP5619003B2 (ja) | 2014-11-05 |
EP2324496B1 (en) | 2018-10-10 |
WO2010025024A1 (en) | 2010-03-04 |
US20100052094A1 (en) | 2010-03-04 |
US8716828B2 (en) | 2014-05-06 |
KR20110102868A (ko) | 2011-09-19 |
US20110260263A1 (en) | 2011-10-27 |
CN102132397A (zh) | 2011-07-20 |
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KR20170013403A (ko) | 2017-02-06 |
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