JP4153500B2 - 半導体装置の製造方法 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims description 48
- 238000004519 manufacturing process Methods 0.000 title claims description 41
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 48
- 238000010438 heat treatment Methods 0.000 claims description 42
- 238000000034 method Methods 0.000 claims description 42
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 41
- 239000000758 substrate Substances 0.000 claims description 32
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 26
- 229910052710 silicon Inorganic materials 0.000 claims description 26
- 239000010703 silicon Substances 0.000 claims description 26
- 239000012298 atmosphere Substances 0.000 claims description 21
- 239000012535 impurity Substances 0.000 claims description 17
- 238000005224 laser annealing Methods 0.000 claims description 11
- 239000011521 glass Substances 0.000 claims description 9
- 238000000151 deposition Methods 0.000 claims description 7
- 230000001678 irradiating effect Effects 0.000 claims description 7
- 238000001237 Raman spectrum Methods 0.000 claims description 6
- 230000003213 activating effect Effects 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 49
- 238000002425 crystallisation Methods 0.000 description 20
- 230000008025 crystallization Effects 0.000 description 14
- 239000010408 film Substances 0.000 description 12
- 239000010409 thin film Substances 0.000 description 10
- 238000004151 rapid thermal annealing Methods 0.000 description 8
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 4
- 229910004205 SiNX Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- H01L29/76—Unipolar devices, e.g. field effect transistors
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- H01L29/78651—Silicon transistors
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Description
ことを特徴とする
図1〜図5は、本発明の第1の実施の形態に係る半導体装置の製造方法を示す工程断面図である。
図6〜図10は、本発明の第2の実施の形態による半導体装置の製造方法を示す工程断面図である。
以下、本発明の望ましい実施例を示す。但し、本発明はこの実施例に限定されるものではない。
まず、基板上に500Å厚さで非晶質シリコン層を蒸着した。この蒸着方法としては、実施例1はLPCVDを用いており、実施例2は2%以下の水素を含むPECVDを用いており、実施例3は10%以上の水素を含むPECVDを用いている。その後、非晶質シリコン層全面に亘ってp型不純物をドーピングした。
比較例1〜3では、前記熱処理時雰囲気をN2またはO2キャリアガスと共にN2雰囲気で熱処理したことを除いては実施例1〜3と同様である。このとき、完全に非晶質シリコンを結晶化するためには熱処理時間は実施例1〜3と同一であるが熱処理温度は740℃で行わなければならなかった。
12 シリコン層
12a 多結晶シリコン層
14 ゲート絶縁膜
16 ゲート電極
100a ソース/ドレイン領域
100c アクティブチャネル領域
Claims (17)
- ガラス基板上に非晶質シリコンを含むシリコン層を蒸着する工程と、
前記シリコン層をH2O雰囲気、熱処理温度が600〜710℃で、10分以下の熱処理時間で熱処理して部分的に結晶化させて非晶質シリコン層を形成する工程と、
前記非晶質シリコン層にレーザ光を照射して多結晶シリコン層にする工程と、
前記多結晶シリコン層上にゲート絶縁膜を形成する工程と、
前記ゲート絶縁膜上にゲート電極を形成する工程と、を備え、
前記H2O雰囲気の圧力は10000Pa〜2MPaであり、
多結晶シリコン層のラマンスペクトラムFWHMは7.5cm−1以下であることを特徴とする半導体装置の製造方法。 - 前記非晶質シリコン層のうち結晶化されない非晶質シリコンの量は全体非晶質シリコンのうち20〜70%であ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。
- 前記非晶質シリコン層のうち結晶化されない非晶質シリコンの量は全体非晶質シリコンのうち30〜60%であ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。
- 前記シリコン層を蒸着する工程の後に、ソース/ドレイン領域に不純物を注入する工程を備え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。
- 前記非晶質シリコン層を部分的に結晶化する工程で、前記ソース/ドレイン領域に注入された不純物が活性化されることを特徴とする請求項4に記載の半導体装置の製造方法。
- 前記ゲート電極を形成する工程の後に、ソース/ドレイン領域に不純を注入して活性化する工程を備えることであ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。
- 前記シリコン層の厚さは2000Å以下であ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。
- 前記シリコン層の厚さは300〜1000Åであることを特徴とする請求項7に記載の半導体装置の製造方法。
- 前記レーザ光を照射する工程は、エキシマレーザアニーリング(ELA)を行う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。
- 前記エキシマレーザアニーリングは、レーザのエネルギー密度が200mJ/cm2以上であることを特徴とする請求項9に記載の半導体装置の製造方法。
- 前記エネルギー密度は、200〜350mJ/cm2であることを特徴とする請求項10に記載の半導体装置の製造方法。
- ガラス基板上に非晶質シリコンを含むシリコン層を蒸着する工程と、
前記シリコン層をH2O雰囲気、熱処理温度が600〜710℃で、10分以下の熱処理時間で熱処理して非晶質シリコンを結晶化して
多結晶シリコン膜を形成する工程と、
前記多結晶シリコン層にレーザ光を照射して前記多結晶シリコン膜を再結晶化する段階と、
前記多結晶シリコン層に不純物領域を形成する工程と、を備え、
前記H2O雰囲気の圧力は10000Pa〜2MPaであり、
多結晶シリコン層のラマンスペクトラムFWHMは7.5cm−1以下である
ことを特徴とする半導体装置の製造方法。 - 前記シリコン層の厚さは、2000Å以下であることを特徴とする請求項12に記載の半導体装置の製造方法。
- 前記シリコン層の厚さは、300〜1000Åであることを特徴とする請求項13に記載の半導体装置の製造方法。
- 前記レーザ光を照射する工程は、エキシマレーザアニーリング(ELA)を行うことを特徴とする請求項12に記載の半導体装置の製造方法。
- 前記エキシマレーザアニーリングの際のレーザのエネルギー密度は、200mJ/cm2 以上であることを特徴とする請求項15に記載の半導体装置以上である半導体装置の製造方法。
- 前記エネルギー密度は、200〜350mJ/cm2であることを特徴とする請求項16に記載の半導体装置の製造方法。
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KR1020040057382A KR100685396B1 (ko) | 2004-07-22 | 2004-07-22 | 반도체 장치의 제조 방법 및 이 방법에 의하여 제조되는반도체 장치 |
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JPH0869967A (ja) * | 1994-08-26 | 1996-03-12 | Semiconductor Energy Lab Co Ltd | 半導体装置の作製方法 |
US7098084B2 (en) * | 2000-03-08 | 2006-08-29 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device and manufacturing method thereof |
KR100810638B1 (ko) * | 2006-12-06 | 2008-03-07 | 삼성에스디아이 주식회사 | 박막트랜지스터와 그 제조방법 및 이를 구비한유기전계발광표시장치 |
KR101015847B1 (ko) | 2008-01-18 | 2011-02-23 | 삼성모바일디스플레이주식회사 | 박막트랜지스터와 그 제조방법 및 이를 구비한유기전계발광표시장치 |
FR2928734A1 (fr) * | 2008-03-11 | 2009-09-18 | Commissariat Energie Atomique | Procede de reparation d'un echantillon destine a etre analyse par microscopie electronique |
JP5436101B2 (ja) * | 2008-09-05 | 2014-03-05 | 株式会社半導体エネルギー研究所 | 半導体装置の作製方法 |
JP5987174B2 (ja) | 2011-10-12 | 2016-09-07 | 株式会社Joled | 薄膜トランジスタ装置 |
KR102014167B1 (ko) * | 2012-12-06 | 2019-10-22 | 삼성디스플레이 주식회사 | 다결정 실리콘층의 제조 방법, 상기 다결정 실리콘층의 제조 방법을 포함하는 유기 발광 표시 장치의 제조 방법, 및 그 제조 방법에 의해 제조된 유기 발광 표시 장치 |
CN103839825A (zh) * | 2014-02-24 | 2014-06-04 | 京东方科技集团股份有限公司 | 一种低温多晶硅薄膜晶体管、阵列基板及其制作方法 |
KR102026823B1 (ko) * | 2019-01-28 | 2019-10-01 | 삼성디스플레이 주식회사 | 다결정 실리콘층의 제조 방법, 상기 다결정 실리콘층의 제조 방법을 포함하는 유기 발광 표시 장치의 제조 방법, 및 그 제조 방법에 의해 제조된 유기 발광 표시 장치 |
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JPS63304670A (ja) | 1987-06-04 | 1988-12-12 | Hitachi Ltd | 薄膜半導体装置の製造方法 |
JP3143967B2 (ja) | 1991-07-09 | 2001-03-07 | カシオ計算機株式会社 | 薄膜トランジスタの製造方法 |
JP3254072B2 (ja) | 1994-02-15 | 2002-02-04 | 株式会社半導体エネルギー研究所 | 半導体装置の作製方法 |
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