JP4871502B2 - 多結晶シリコン薄膜の製造方法及びこれを用いて製造される多結晶シリコンを用いる薄膜トランジスタ - Google Patents
多結晶シリコン薄膜の製造方法及びこれを用いて製造される多結晶シリコンを用いる薄膜トランジスタ Download PDFInfo
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- 229910021420 polycrystalline silicon Inorganic materials 0.000 title claims description 38
- 239000010409 thin film Substances 0.000 title claims description 31
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 46
- 238000000034 method Methods 0.000 claims description 29
- 239000000758 substrate Substances 0.000 claims description 24
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 23
- 239000012298 atmosphere Substances 0.000 claims description 23
- 239000010408 film Substances 0.000 claims description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 14
- 229910052710 silicon Inorganic materials 0.000 claims description 14
- 239000010703 silicon Substances 0.000 claims description 14
- 238000004151 rapid thermal annealing Methods 0.000 claims description 9
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 claims description 7
- 238000004518 low pressure chemical vapour deposition Methods 0.000 claims description 5
- 238000000151 deposition Methods 0.000 claims description 4
- 238000005224 laser annealing Methods 0.000 claims description 4
- 239000012159 carrier gas Substances 0.000 claims description 2
- 239000004973 liquid crystal related substance Substances 0.000 claims description 2
- 238000002425 crystallisation Methods 0.000 description 33
- 230000008025 crystallization Effects 0.000 description 26
- 230000007547 defect Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 238000001237 Raman spectrum Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000012299 nitrogen atmosphere Substances 0.000 description 4
- 239000007790 solid phase Substances 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000005401 electroluminescence Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen 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
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- A47G9/00—Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows
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- C30B1/00—Single-crystal growth directly from the solid state
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- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/02—Elements
- C30B29/06—Silicon
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- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02367—Substrates
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Description
基板上に500Åの厚さとなるように非晶質シリコン膜を蒸着した。前記蒸着方法として、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を用いた。続いて、前記非晶質シリコン膜をRTA(Rapid Thermal Annealing)により、約700℃で10分以下、熱処理して結晶化させた。前記熱処理時の雰囲気を、O2またはN2キャリアガスを用いたH2O雰囲気として熱処理した。形成された多結晶シリコンのラマンスペクトルを図1に図示した。
比較例1では前記熱処理時の雰囲気をN2雰囲気としたことを除いては、実施例1ないし3と同様の工程を進行した。すなわち、熱処理温度は700℃で進行しており、その結果を図2に図示した。
基板上に非晶質シリコンをPECVD方法によって1,000Åの厚さに蒸着した。前記非晶質シリコンを2MPaのH2O蒸気下、600℃で加熱した。600℃におけるシリコン結晶化速度は小さいが、結晶化速度は圧力に比例するため圧力を増加させることによって酸化速度を調節することができた。すなわち、圧力を高めることによって結晶化温度と時間を減少させることができる。この時の結晶化速度を測定した結果、2時間以下であった。
前記実施例4において、1気圧のN2雰囲気で非晶質シリコンを結晶化させたことを除いては実施例4と同一な条件で進行した。この時、結晶化速度を測定した結果、5時間程度だったが、これは前記非晶質シリコンがあらかじめ熱処理を経て核生成サイト(Nucleating Site)を含んでいるからであり、以前に全く熱処理を経ていない非晶質シリコンの場合、20時間以上の時間が必要である。
Claims (11)
- 基板上に非晶質シリコンを含むシリコン膜を蒸着する段階;及び
前記シリコン膜をO 2 またはN 2 キャリアガスを用いたH2O雰囲気、特定温度下でRTA(Rapid Thermal Annealing)方法を用いて熱処理する段階を含み、
前記H2Oの圧力は10,000Pa以上であり、前記温度は550℃ないし750℃であり、前記熱処理時間は10分以下であることを特徴とする多結晶シリコン薄膜の製造方法。 - 前記温度は600℃ないし710℃であることを特徴とする請求項1に記載の多結晶シリコン薄膜の製造方法。
- 前記H2Oの圧力は10,000Paないし2MPaであることを特徴とする請求項1又は2に記載の多結晶シリコン薄膜の製造方法。
- 前記シリコン膜の厚さは2,000Å以下であることを特徴とする請求項1から3のいずれか1項に記載の多結晶シリコン薄膜の製造方法。
- 前記シリコン膜の厚さは100Åないし1,000Åであることを特徴とする請求項4に記載の多結晶シリコン薄膜の製造方法。
- 前記熱処理をした後、加熱炉またはエキシマレーザーアニーリング(ELA)によって、前記シリコン膜をもう一度熱処理する段階をさらに含むことを特徴とする請求項1から5のいずれか1項に記載の多結晶シリコン薄膜の製造方法。
- 前記シリコン膜は低圧化学気相蒸着法(LPCVD)またはプラズマ化学気相蒸着法(PECVD)によって蒸着されるものであることを特徴とする請求項1から6のいずれか1項に記載の多結晶シリコン薄膜の製造方法。
- 請求項1から7のいずれか1項に記載の方法によって製造される多結晶シリコン薄膜を用いることを特徴とする薄膜トランジスタ。
- 前記多結晶シリコン薄膜の半値幅(FWHM)は6.0cm−1ないし7.5cm−1であることを特徴とする請求項8に記載の薄膜トランジスタ。
- 前記多結晶シリコン薄膜の半値幅(FWHM)は6.5cm−1ないし7.0cm−1であることを特徴とする請求項9に記載の薄膜トランジスタ。
- 前記薄膜トランジスタは有機電界発光素子または液晶表示素子に用いられるものであることを特徴とする請求項8から10のいずれか1項に記載の薄膜トランジスタ。
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KR2004-011146 | 2004-02-19 | ||
KR1020040011146A KR100623251B1 (ko) | 2004-02-19 | 2004-02-19 | 다결정 실리콘 박막의 제조 방법 및 이를 사용하여제조되는 다결정 실리콘을 사용하는 박막 트랜지스터 |
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KR100666552B1 (ko) * | 2004-06-30 | 2007-01-09 | 삼성에스디아이 주식회사 | 반도체 소자의 제조 방법 및 이 방법에 의하여 제조되는반도체 소자 |
CN100459043C (zh) * | 2006-02-08 | 2009-02-04 | 财团法人工业技术研究院 | 多晶硅膜的制造方法以及薄膜晶体管的制造方法 |
CN101290877B (zh) * | 2007-04-20 | 2011-03-23 | 中芯国际集成电路制造(上海)有限公司 | 多晶硅薄膜的制备方法 |
TWI556323B (zh) * | 2009-03-13 | 2016-11-01 | 半導體能源研究所股份有限公司 | 半導體裝置及該半導體裝置的製造方法 |
CN102110740B (zh) * | 2010-11-23 | 2012-09-05 | 上海交通大学 | 定向凝固多晶硅太阳电池的两次热处理方法 |
CN102978590A (zh) * | 2012-11-27 | 2013-03-20 | 上海大学 | 多循环快速热退火非晶硅薄膜的方法 |
WO2018076139A1 (zh) * | 2016-10-24 | 2018-05-03 | 丁欣 | 多晶硅的制造方法以及单晶硅的制造方法 |
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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 |
JPH06204137A (ja) * | 1992-10-19 | 1994-07-22 | Samsung Electron Co Ltd | 多結晶シリコン薄膜の製造方法 |
JPH06310427A (ja) * | 1993-04-21 | 1994-11-04 | Sanyo Electric Co Ltd | 半導体装置の製造方法 |
JP3306258B2 (ja) * | 1995-03-27 | 2002-07-24 | 三洋電機株式会社 | 半導体装置の製造方法 |
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KR100188099B1 (ko) | 1995-10-17 | 1999-07-01 | 김광호 | 액정 표시 장치용 박막 트랜지스터 기판의 제조방법 |
JP3927634B2 (ja) | 1995-10-25 | 2007-06-13 | 株式会社半導体エネルギー研究所 | レーザーアニール方法及び薄膜トランジスタの作製方法 |
JP3729955B2 (ja) * | 1996-01-19 | 2005-12-21 | 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 |
JP3662371B2 (ja) | 1996-10-15 | 2005-06-22 | 株式会社半導体エネルギー研究所 | 薄膜トランジスタの作製方法及び薄膜トランジスタ |
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JPH11329972A (ja) | 1998-05-19 | 1999-11-30 | Ishikawajima Harima Heavy Ind Co Ltd | 半導体膜の形成方法 |
JP4019584B2 (ja) | 1999-12-27 | 2007-12-12 | 株式会社Ihi | 半導体膜の形成方法 |
JP2001210726A (ja) * | 2000-01-24 | 2001-08-03 | Hitachi Ltd | 半導体装置及びその製造方法 |
US6521492B2 (en) * | 2000-06-12 | 2003-02-18 | Seiko Epson Corporation | Thin-film semiconductor device fabrication method |
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