JP4526819B2 - キセノン(Xe)による事前非晶質化のためのインプランテーション - Google Patents
キセノン(Xe)による事前非晶質化のためのインプランテーション Download PDFInfo
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- 229910052724 xenon Inorganic materials 0.000 title claims description 20
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 title claims description 20
- 238000002513 implantation Methods 0.000 title claims description 14
- 238000005280 amorphization Methods 0.000 title description 10
- 150000002500 ions Chemical class 0.000 claims description 51
- 239000000758 substrate Substances 0.000 claims description 45
- 229910052710 silicon Inorganic materials 0.000 claims description 38
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 37
- 239000010703 silicon Substances 0.000 claims description 36
- 238000005468 ion implantation Methods 0.000 claims description 35
- 239000004065 semiconductor Substances 0.000 claims description 34
- 238000010884 ion-beam technique Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 28
- 239000002019 doping agent Substances 0.000 claims description 26
- 238000004519 manufacturing process Methods 0.000 claims description 24
- 238000000137 annealing Methods 0.000 claims description 23
- 239000012535 impurity Substances 0.000 claims description 20
- 125000006850 spacer group Chemical group 0.000 claims description 14
- -1 xenon dimer ions Chemical class 0.000 claims description 12
- 230000003213 activating effect Effects 0.000 claims description 7
- 239000000539 dimer Substances 0.000 claims description 6
- 239000012212 insulator Substances 0.000 claims description 4
- 150000003736 xenon Chemical class 0.000 claims description 3
- 229910052571 earthenware Inorganic materials 0.000 claims 1
- 239000007943 implant Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 238000004458 analytical method Methods 0.000 description 10
- 238000007667 floating Methods 0.000 description 9
- 238000000605 extraction Methods 0.000 description 7
- 230000004913 activation Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910021419 crystalline silicon Inorganic materials 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 229910052732 germanium Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Description
本発明の他の特徴は、極浅接合を持ち、ソース・ドレインの拡張部(extension)および領域が正確に形成されている半導体装置の製造方法である。
本発明のさらに他の特徴は、後述の説明文において説明され、および部分的には説明文を検討する当業者にとって明らかになるものであり、または本発明の実施によって理解される。本発明の特徴は、添付の特許請求の範囲に特に指摘されているように、実現され、または得られるであろう。
本発明はさらに、Xeイオン注入により、特にXe2 +のイオン注入により、よく定義された極浅接合を持つ半導体装置の効率的な製造方法を提供する。本発明はさらに、SOI基板を含み、フローティングボディ効果をかなり減少させた半導体装置の製造を可能にする方法を提供する。ソース/ドレインの拡張部およびソース/ドレイン領域の形成に先立ってプリアモルファス(事前非晶質)化を行うためにXeイオン注入を採用することによって、SOIタイプの構造におけるフローティングボディ効果が有利に減少することの根底にある詳しい仕組みはよくわかっていない。しかしながら、GeやSiなどの原子と比較して、Xeの高い原子量(atomic weight)と大きなイオンサイズの組み合わせにより、そして水平および垂直方法の伸び広がりが抑えられることによって、なんらかの方法で再結晶化した格子内のドーパント活性化とXeの内包化が促進され、通常イオン注入による結晶損傷によって生じる過剰な漏れ電流なしに、フローティングボディ効果を事実上除去し、またははっきりと減少させる。
本発明の実施形態において、SOI構造の上部結晶質シリコン層上にゲート電極構造を形成する、そしてXeをイオン注入して、前記上部シリコン層を前記埋め込み絶縁層に向かって非晶質化する。Xeのイオン注入は、おおよそ1×1014からおおよそ5×1014イオン/cm2の注入量で、かつおおよそ1KeVからおおよそ200KeVの注入エネルギー(例えば、おおよそ10KeVからおおよそ130KeV)で行われる。
Claims (8)
- 半導体装置の製造方法であって、
下部シリコン基板、前記基板上の埋め込み絶縁層、前記埋め込み絶縁層上の結晶質上部シリコン層及び前記結晶質上部シリコン層の上にゲート絶縁膜を間にはさんで形成されたゲート電極を含むシリコン・オン・インシュレータ(SOI)構造を形成するステップと、
1次キセノン(Xe)イオンビームをイオン源から引き出し、前記1次キセノンイオンビームを分析し、前記1次キセノンイオンビームから一価に帯電したキセノンの二量体イオン(Xe2 +)を選択して、当該キセノンの二量体イオンからなるイオンビームを生成し、前記結晶質上部シリコン層に前記キセノンの二量体イオンを前記生成されたイオンビームにより注入して、前記結晶質上部シリコン層の上面から前記埋め込み絶縁層に向かってのびる第1非晶質領域を形成するステップと、
前記第1非晶質領域に第1ドーパントイオン不純物を注入して、ソース/ドレイン拡張部ドープ領域を形成するステップと、
前記ソース/ドレイン拡張部ドープ領域中の前記第1ドーパントイオン不純物を活性化してソース/ドレイン拡張部を形成するとともに、前記第1非晶質領域を再結晶化するために第1アニーリングをするステップと、
前記結晶質上部シリコン層に前記キセノンの二量体イオンを注入して、前記結晶質上部シリコン層の上面から前記埋め込み絶縁層に向かってのびる第2非晶質領域を形成するステップと、
前記ソース/ドレイン拡張部ドープ領域を形成するステップとは別に、前記第2非晶質領域に第2ドーパントイオン不純物を注入して、ソース/ドレインドープ領域を形成するステップと、
前記ソース/ドレインドープ領域中の前記第2ドーパントイオン不純物を活性化してソース/ドレイン領域を形成するとともに、前記第2非晶質領域を再結晶化するために第2アニーリングをするステップとを含み、前記各ステップをこの順で実行する製造方法。 - 前記キセノンの二量体イオンの注入を、1×1014から5×1014イオン/cm2の注入量で、かつ3KeVから150KeVの注入エネルギーで行ない、
前記第1アニーリング及び前記第2アニーリングを、摂氏500度から摂氏650度の温度で行う、請求項1記載の製造方法。 - 前記ソース/ドレイン拡張部ドープ領域を形成するステップの後であって、前記第2非晶質領域を形成するステップの前に、サイドウォールスペーサを前記ゲート電極の側面に形成する、請求項1記載の製造方法。
- 半導体装置の製造方法であって、
下部シリコン基板、前記基板上の埋め込み絶縁層、前記埋め込み絶縁層上の結晶質上部シリコン層及び前記結晶質上部シリコン層の上にゲート絶縁膜を間にはさんで形成されたゲート電極を含むシリコン・オン・インシュレータ(SOI)構造を形成するステップと、
サイドウォールスペーサを前記ゲート電極の側面に形成するステップと、
1次キセノン(Xe)イオンビームをイオン源から引き出し、前記1次キセノンイオンビームを分析し、前記1次キセノンイオンビームから一価に帯電したキセノンの二量体イオン(Xe2 +)を選択して、当該キセノンの二量体イオンからなるイオンビームを生成し、前記結晶質上部シリコン層に前記キセノンの二量体イオンを前記生成されたイオンビームにより注入して、前記結晶質上部シリコン層の上面から前記埋め込み絶縁層に向かってのびる第1非晶質領域を形成するステップと、
前記第1非晶質領域に第1ドーパントイオン不純物を注入して、ソース/ドレインドープ領域を形成するステップと、
前記ソース/ドレインドープ領域中の前記第1ドーパントイオン不純物を活性化してソース/ドレイン領域を形成するとともに、前記第1非晶質領域を再結晶化するためにアニーリングをするステップと、
前記サイドウォールスペーサを取り除くステップと、
前記結晶質上部シリコン層に前記キセノンの二量体イオンを注入して、前記結晶質上部シリコン層の上面から前記埋め込み絶縁層に向かってのびる第2非晶質領域を形成するステップと、
前記ソース/ドレインドープ領域を形成するステップとは別に、前記第2非晶質領域に第2ドーパントイオン不純物を注入して、ソース/ドレイン拡張部ドープ領域を形成するステップと、
前記ソース/ドレイン拡張部ドープ領域中の前記第2ドーパントイオン不純物を活性化してソース/ドレイン拡張部を形成するとともに、前記第2非晶質領域を再結晶化するためにアニーリングをするステップとを含み、前記各ステップをこの順で実行する製造方法。 - 半導体装置の製造方法であって、
結晶質半導体基板の表面上に、ゲート絶縁膜を間にはさんでゲート電極を形成するステップと、
1次キセノン(Xe)イオンビームをイオン源から引き出し、前記1次キセノンイオンビームを分析し、前記1次キセノンイオンビームから一価に帯電したキセノンの二量体イオン(Xe2 +)を選択して、当該キセノンの二量体イオンからなるイオンビームを生成し、前記結晶質半導体基板に前記キセノンの二量体イオンを前記生成されたイオンビームにより注入して、前記結晶質半導体基板の領域を非晶質化して第1非晶質領域を形成するステップと、
前記第1非晶質領域に第1ドーパントイオン不純物を注入して、ソース/ドレイン拡張部ドープ領域を形成するステップと、
前記ソース/ドレイン拡張部ドープ領域中の前記第1ドーパントイオン不純物を活性化してソース/ドレイン拡張部を形成するとともに、前記第1非晶質領域を再結晶化するために、摂氏500度から摂氏650度の温度で第1アニーリングをするステップと、
前記結晶質半導体基板に前記キセノンの二量体イオンを注入して、前記結晶質半導体基板の領域を非晶質化して第2非晶質領域を形成するステップと、
前記第2非晶質領域に第2ドーパントイオン不純物を注入して、ソース/ドレインドープ領域を形成するステップと、
前記ソース/ドレインドープ領域中の前記第2ドーパントイオン不純物を活性化してソース/ドレイン領域を形成するとともに、前記第2非晶質領域を再結晶化するために、摂氏500度から摂氏650度の温度で第2アニーリングをするステップとを含み、前記各ステップをこの順で実行する製造方法。 - 前記第1非晶質領域を形成するステップを、前記第1非晶質領域が前記基板の表面から400オングストロームを超えない深さまでのびるように行う、請求項5記載の製造方法。
- 前記ソース/ドレイン拡張部ドープ領域を形成するステップの後であって、前記第2非晶質領域を形成するステップの前に、サイドウォールスペーサを前記ゲート電極の側面に形成する、請求項5記載の製造方法。
- 半導体装置の製造方法であって、
結晶質半導体基板の表面上に、ゲート絶縁膜を間にはさんでゲート電極を形成するステップと、
サイドウォールスペーサを、前記ゲート電極の側面に形成するステップと、
1次キセノン(Xe)イオンビームをイオン源から引き出し、前記1次キセノンイオンビームを分析し、前記1次キセノンイオンビームから一価に帯電したキセノンの二量体イオン(Xe2 +)を選択して、当該キセノンの二量体イオンからなるイオンビームを生成し、前記結晶質半導体基板に前記キセノンの二量体イオンを前記生成されたイオンビームにより注入して、前記結晶質半導体基板の領域を非晶質化して第1非晶質領域を形成するステップと、
前記第1非晶質領域に第1ドーパントイオン不純物を注入して、離間したソース/ドレインドープ領域を形成するステップと、
前記ソース/ドレインドープ領域中の前記第1ドーパントイオン不純物を活性化してソース/ドレイン領域を形成するとともに、前記第1非晶質領域を再結晶化するために、第1アニーリングをするステップと、
前記サイドウォールスペーサを取り除くステップと、
前記結晶質半導体基板に前記キセノンの二量体イオンを注入して、前記結晶質半導体基板の領域を非晶質化して第2非晶質領域を形成するステップと、
前記第2非晶質領域に第2ドーパントイオン不純物を注入して、ソース/ドレイン拡張部ドープ領域を形成するステップと、
前記ソース/ドレイン拡張部ドープ領域中の前記第2ドーパントイオン不純物を活性化してソース/ドレイン拡張部を形成するとともに、前記第2非晶質領域を再結晶化するために摂氏500度から摂氏650度の温度で第2アニーリングをするステップとを含み、前記各ステップをこの順で実行する製造方法。
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US09/918,794 US6624037B2 (en) | 2001-08-01 | 2001-08-01 | XE preamorphizing implantation |
PCT/US2002/010827 WO2003012844A1 (en) | 2001-08-01 | 2002-04-05 | Xe preamorphizing implantation |
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KR (1) | KR100880687B1 (ja) |
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WO (1) | WO2003012844A1 (ja) |
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EP1419521B1 (en) | 2007-09-26 |
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DE60222675D1 (de) | 2007-11-08 |
TWI228276B (en) | 2005-02-21 |
EP1511071A3 (en) | 2009-01-14 |
CN1539160A (zh) | 2004-10-20 |
US20030027381A1 (en) | 2003-02-06 |
US6624037B2 (en) | 2003-09-23 |
WO2003012844A1 (en) | 2003-02-13 |
KR100880687B1 (ko) | 2009-01-30 |
CN1307688C (zh) | 2007-03-28 |
EP1419521A1 (en) | 2004-05-19 |
KR20040026701A (ko) | 2004-03-31 |
EP1511071A2 (en) | 2005-03-02 |
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