JP2012507865A - 複数のトランジスタゲートの形成方法、および少なくとも二つの異なる仕事関数を有する複数のトランジスタゲートの形成方法 - Google Patents
複数のトランジスタゲートの形成方法、および少なくとも二つの異なる仕事関数を有する複数のトランジスタゲートの形成方法 Download PDFInfo
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Abstract
Description
Claims (35)
- 少なくとも二つの異なる仕事関数を有する複数のトランジスタゲートを形成する方法であって、
基板上に第一および第二のトランジスタゲートを形成するステップであって、前記第一のゲートは第一の幅を有し、前記第二のゲートは第二の幅を有し、前記第一の幅は前記第二の幅よりも狭い、ステップと、
前記第一および第二のゲート上を含む前記基板上に材料を堆積するステップと、
エッチングチャンバー内で、前記第一のゲートの導電性材料を露出するため、ならびに、前記材料によって被覆された前記第二のゲートをそのまま残し、前記第二のゲート上に支持された前記材料の厚さを減少させるために、前記第一および第二のゲートの双方の上から前記材料をエッチングするステップと、
前記エッチングするステップの後に前記エッチングチャンバー内のそのままの位置で、前記第二のゲートの仕事関数と比較して、前記第一のゲートの仕事関数を改変するために、前記第一のゲートへと金属を拡散させるために、少なくとも300℃の基板温度で前記金属を含むプラズマに前記基板を暴露するステップと、
を含む、
ことを特徴とする方法。 - 前記第二のゲート上に支持された前記材料は、前記暴露するステップの間、前記金属のうちのいずれかが前記第二のゲートへと拡散することから保護する、
ことを特徴とする請求項1に記載の方法。 - 前記暴露するステップもまた、前記第二のゲート上に支持された前記材料へと前記金属を拡散させる、
ことを特徴とする請求項1に記載の方法。 - 前記第二のゲート上に支持された前記材料は、前記暴露するステップの間、前記金属のうちのいずれかが前記第二のゲートへと拡散することから保護する、
ことを特徴とする請求項3に記載の方法。 - 前記金属のうちの幾つかもまた、前記第二のゲートへと拡散する、
ことを特徴とする請求項3に記載の方法。 - 第一の領域内の前記基板上に前記複数の第一のゲートを形成するステップ、前記堆積するステップ、エッチングするステップ、および暴露するステップは、前記複数の第一のゲートに対して生じる、
ことを特徴とする請求項1に記載の方法。 - 前記第一の領域とは異なる第二の領域内の前記基板上に前記複数の第二のゲートを形成するステップを含み、前記堆積するステップおよびエッチングするステップは前記複数の第二のゲートに関して生じる、
ことを特徴とする請求項6に記載の方法。 - 前記材料は、前記第一および第二のゲートの各々の厚さよりも小さい厚さまで堆積される、
ことを特徴とする請求項1に記載の方法。 - 前記材料は実質的に整合されて堆積され、非平面の最外部表面を有する、
ことを特徴とする請求項8に記載の方法。 - 前記材料は前記第一および第二のゲートの各々の厚さよりも大きい厚さまで堆積され、前記材料は、平面の最外部表面を有するように堆積される、
ことを特徴とする請求項1に記載の方法。 - 前記プラズマにおける前記金属は、有機金属化合物由来である、
ことを特徴とする請求項1に記載の方法。 - 前記エッチングするステップおよび暴露するステップは、前記材料のうちのいずれかの上に支持されたいかなるマスクなしでも生じる、
ことを特徴とする請求項1に記載の方法。 - 少なくとも二つの異なる仕事関数を有する複数のトランジスタゲートを形成する方法であって、
基板上に複数のトランジスタゲートを形成するステップであって、前記複数のトランジスタゲートは導電性領域を含む、ステップと、
前記複数のトランジスタゲートの前記導電性領域上に材料を提供するステップであって、前記材料は、前記複数のトランジスタゲートの前記導電性領域の最外部とは異なる組成を有する、ステップと、
前記材料を提供するステップの後、前記複数のトランジスタゲートのうちの幾つかを被覆し、マスクによって被覆されていない前記複数のトランジスタゲートのうちの他の物をそのまま残すように前記マスクを形成するステップと、
エッチングチャンバー内で前記マスクを形成するステップの後、前記マスクによって被覆されていない前記複数のトランジスタゲート上に支持されたものから前記材料をエッチングするステップと、
前記エッチングするステップの後に前記エッチングチャンバー内のそのままの位置で、前記マスクによって被覆された前記複数のトランジスタゲートの仕事関数と比較して、前記マスクによって被覆されていない前記複数のトランジスタゲートの仕事関数を改変するために、前記マスクによって被覆されていない前記複数のトランジスタゲートの前記導電性領域へと金属を拡散させるために、少なくとも300℃の基板温度で前記金属を含むプラズマへと前記基板を暴露するステップと、
を含む、
ことを特徴とする方法。 - 前記材料は絶縁性である、
ことを特徴とする請求項13に記載の方法。 - 前記材料は導電性もしくは半導電性である、
ことを特徴とする請求項13に記載の方法。 - 前記マスクは、前記金属のうちのいずれかが前記マスクによって被覆された前記複数のトランジスタゲートの前記導電性領域へ拡散することから保護する、
ことを特徴とする請求項13に記載の方法。 - 前記導電性領域のうちの少なくとも前記最外部は、少なくとも一つの元素形態金属もしくは元素形態金属の合金を含む、
ことを特徴とする請求項13に記載の方法。 - 前記導電性領域の全ては、本質的に、一つ以上の元素形態金属もしくは元素形態金属の合金から成る、
ことを特徴とする請求項17に記載の方法。 - 前記導電性領域のうちの少なくとも前記最外部は、導電性を有するようにドープされたポリシリコンを含み、前記暴露するステップは、前記導電性領域内に導電性金属シリサイドを形成する、
ことを特徴とする請求項13に記載の方法。 - 前記プラズマにおける前記金属は、有機金属化合物由来である、
ことを特徴とする請求項13に記載の方法。 - 前記材料は、非平面の最外部表面を有するように堆積される、
ことを特徴とする請求項13に記載の方法。 - 前記材料は、平面の最外部表面を有するように堆積される、
ことを特徴とする請求項13に記載の方法。 - 複数のトランジスタゲートを形成する方法であって、
基板上に複数のトランジスタゲートを形成するステップであって、前記複数のトランジスタゲートは導電性領域を含む、ステップと、
前記複数の隣接するトランジスタゲート上およびその間の範囲を含む前記基板上に第一の材料を堆積するステップであって、前記第一の材料は、前記複数のトランジスタゲートの前記導電性領域の最外部とは異なる組成を有する、ステップと、
前記複数の隣接するトランジスタゲート間の範囲から前記第一の材料を除去し、ならびに、前記複数のトランジスタゲートの複数の上部および複数の側壁を被覆する前記第一の材料をそのまま残すために前記第一の材料をエッチングするステップと、
前記第一の材料をエッチングするステップの後に、前記複数の隣接するトランジスタゲート上およびその間の範囲を含む前記基板上に第二の材料を堆積するステップと、
前記複数のトランジスタゲートのうちの少なくとも幾つかの上に支持されたものから前記第二の材料をエッチングするステップであって、前記隣接する複数のトランジスタゲート間の範囲をそのまま残す、ステップと、
エッチングチャンバー内で、前記第二の材料をエッチングするステップの後に、前記複数のトランジスタゲートのうちの前記少なくとも幾つかの上に支持されたものから前記第一の材料をエッチングするステップと、
前記エッチングチャンバー内のそのままの位置で、前記複数のトランジスタゲートのうちの前記少なくとも幾つかの上に支持されたものから前記第一の材料を前記エッチングするステップの後、前記複数のトランジスタゲートのうちの前記少なくとも幾つかの仕事関数を改変するために、前記複数のトランジスタゲートのうちの前記少なくとも幾つかの前記導電性領域へと金属を拡散させるために、少なくとも300℃の基板温度で、前記金属を含むプラズマに対して前記基板を暴露するステップと、
を含む、
ことを特徴とする方法。 - 前記第二の材料は、平面の最外部表面を有するように堆積される、
ことを特徴とする請求項23に記載の方法。 - 前記第一の材料は、非平面の最外部表面を有するように堆積される、
ことを特徴とする請求項24に記載の方法。 - 前記第二の材料をエッチングするステップは、前記チャンバー内で生じ、前記複数のトランジスタゲートのうちの前記少なくとも幾つかの上に支持されたものから前記第一の材料を前記エッチングするステップは、その後でそのままの位置で生じる、
ことを特徴とする請求項23に記載の方法。 - 前記複数のトランジスタゲートのうちの幾つかのみの上に支持されたものから前記第二の材料をエッチングするステップを含む、
ことを特徴とする請求項23に記載の方法。 - 前記複数のトランジスタゲートの全ての上に支持されたものから、前記第二の材料をエッチングするステップを含む、
ことを特徴とする請求項23に記載の方法。 - 前記プラズマにおける前記金属は、有機金属化合物由来である、
ことを特徴とする請求項23に記載の方法。 - 少なくとも二つの異なる幅を有するように、前記複数のトランジスタゲートを形成するステップを含む、
ことを特徴とする請求項23に記載の方法。 - 複数のトランジスタゲートを形成する方法であって、
基板上に複数のトランジスタゲートを形成するステップであって、前記複数のトランジスタゲートは導電性領域を含む、ステップと、
前記複数のトランジスタゲートの前記導電性領域上に材料を提供するステップであって、前記材料は、前記複数のトランジスタゲートの前記導電性領域の最外部とは異なる組成である、ステップと、
エッチングチャンバー内で、前記複数のトランジスタゲートの前記導電性領域上に支持されたものから前記材料をブランケットエッチングするステップと、
前記エッチングチャンバー内のそのままの位置で、前記エッチングするステップの後、前記複数のトランジスタゲートの仕事関数を改変するために、前記複数のトランジスタゲートの前記導電性領域へと金属を拡散させるために、少なくとも300℃の基板温度で、前記金属を含むプラズマへと前記基板を暴露するステップと、
を含む、
ことを特徴とする方法。 - 前記導電性領域は、前記暴露するステップの後に均質ではない、
ことを特徴とする請求項31に記載の方法。 - 前記導電性領域は、前記暴露するステップの前に均質である、
ことを特徴とする請求項32に記載の方法。 - 前記導電性領域は、前記暴露するステップの前と後に均質である、
ことを特徴とする請求項31に記載の方法。 - 前記プラズマにおける前記金属は、有機金属化合物由来である、
ことを特徴とする請求項31に記載の方法。
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US7824986B2 (en) | 2010-11-02 |
EP2342740B1 (en) | 2014-04-02 |
SG177975A1 (en) | 2012-02-28 |
TW201027673A (en) | 2010-07-16 |
US8034687B2 (en) | 2011-10-11 |
EP2342740A4 (en) | 2012-12-19 |
US20120021594A1 (en) | 2012-01-26 |
US20110039404A1 (en) | 2011-02-17 |
JP5333977B2 (ja) | 2013-11-06 |
WO2010053720A3 (en) | 2010-07-08 |
CN102203923B (zh) | 2014-09-03 |
US8524561B2 (en) | 2013-09-03 |
SG177976A1 (en) | 2012-02-28 |
TWI397975B (zh) | 2013-06-01 |
EP2342740A2 (en) | 2011-07-13 |
KR20110084221A (ko) | 2011-07-21 |
WO2010053720A2 (en) | 2010-05-14 |
CN102203923A (zh) | 2011-09-28 |
US20100112808A1 (en) | 2010-05-06 |
KR101173799B1 (ko) | 2012-08-16 |
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