JP2006066860A - 薄膜トランジスタ製造方法 - Google Patents
薄膜トランジスタ製造方法 Download PDFInfo
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- 239000010409 thin film Substances 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 76
- 229910021417 amorphous silicon Inorganic materials 0.000 claims abstract description 62
- 229910052751 metal Inorganic materials 0.000 claims abstract description 38
- 239000002184 metal Substances 0.000 claims abstract description 38
- 239000000758 substrate Substances 0.000 claims abstract description 37
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 35
- 239000003054 catalyst Substances 0.000 claims abstract description 31
- 239000010408 film Substances 0.000 claims abstract description 31
- 239000004065 semiconductor Substances 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims description 203
- 238000002425 crystallisation Methods 0.000 claims description 32
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 25
- 230000008025 crystallization Effects 0.000 claims description 20
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 18
- 229910000077 silane Inorganic materials 0.000 claims description 18
- 229910021529 ammonia Inorganic materials 0.000 claims description 7
- 239000011229 interlayer Substances 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical group N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 238000000151 deposition Methods 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- 229910052787 antimony Inorganic materials 0.000 claims description 2
- 229910052793 cadmium Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 238000000059 patterning Methods 0.000 claims description 2
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- 229910052703 rhodium Inorganic materials 0.000 claims description 2
- 229910052707 ruthenium Inorganic materials 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 229910052718 tin Inorganic materials 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 239000013078 crystal Substances 0.000 abstract description 14
- 150000004767 nitrides Chemical class 0.000 abstract description 13
- 239000007789 gas Substances 0.000 description 20
- 238000005229 chemical vapour deposition Methods 0.000 description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 230000007423 decrease Effects 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 238000006356 dehydrogenation reaction Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 238000007715 excimer laser crystallization Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012297 crystallization seed Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000010944 silver (metal) Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02436—Intermediate layers between substrates and deposited layers
- H01L21/02494—Structure
- H01L21/02496—Layer structure
- H01L21/02502—Layer structure consisting of two layers
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- H01L27/1259—Multistep manufacturing methods
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- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
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Abstract
【解決手段】 絶縁基板を準備する段階と、基板上に非晶質シリコン層を形成する段階と、非晶質シリコン層上に屈折率が1.78から1.90のキャッピング層を形成する段階と、キャッピング層上に金属触媒層を形成する段階と、基板を熱処理して非晶質シリコン層を多結晶シリコン層に結晶化する段階を含む。本発明の薄膜トランジスタ制造方法によれば、SGS結晶化法で結晶化時、窒化膜で形成されたキャッピング層の屈折率を制御することにより、結晶粒径が大きい半導体層を得ることができ、電子移動度が大きく、特性が優秀で、特性を制御することができる。
【選択図】 図1C
Description
前記図1A及び図1Bで前述したように絶縁基板上に非晶質シリコン層を形成して、前記非晶質シリコン層上にバッファー層を化学的気相蒸着法を利用して700Wの工程パワー、アンモニアガス/シランガスの比が20/1の工程条件で窒化膜であるキャッピング層を形成した結果、前記キャッピング層の屈折率は1.832であることが分かる。
前記図1A及び図1Bで前述したように絶縁基板上に非晶質シリコン層を形成して、前記非晶質シリコン層上にバッファー層を化学的気相蒸着法を利用して700Wの工程パワー、アンモニアガス/シランガスの比が80/1の工程条件で窒化膜であるキャッピング層を形成した結果、前記キャッピング層の屈折率は1.824であることが分かる。
104 キャッピング層
105 金属触媒層
106 熱処理
108 シード
109 多結晶シリコン層
Claims (9)
- 絶縁基板を準備する段階と、
前記基板上に非晶質シリコン層を形成する段階と、
前記非晶質シリコン層上に屈折率が1.78ないし1.90であるキャッピング層を形成する段階と、
前記キャッピング層上に金属触媒層を形成する段階と、
前記基板を熱処理して前記非晶質シリコン層を多結晶シリコン層に結晶化する段階と、を含むことを特徴とする薄膜トランジスタ製造方法。 - 前記結晶化する段階以後、
前記キャッピング層を除去する段階と、
前記多結晶シリコン層をパターニングして半導体層を形成する段階と、
前記基板上にゲート絶縁膜、ゲート電極、層間絶縁膜及びソース/ドレイン電極を形成する段階と、をさらに含むことを特徴とする請求項1に記載の薄膜トランジスタ製造方法。 - 前記金属触媒層を形成する段階はNi、Pd、Ti、Ag、Au、Al、Sn、Sb、Cu、Co、Mo、Tr、Ru、Rh、CdまたはPtのうちいずれか一つ以上の金属触媒を蒸着する段階であることを特徴とする請求項1に記載の薄膜トランジスタ製造方法。
- 前記金属触媒層を形成する段階は金属触媒を1011ないし1015atoms/cm2の面密度で形成する段階であることを特徴とする請求項1に記載の薄膜トランジスタ製造方法。
- 前記熱処理は第1熱処理工程及び第2熱処理工程で構成されていることを特徴とする請求項1に記載の薄膜トランジスタ製造方法。
- 前記第1熱処理工程は200ないし600℃の温度範囲で熱処理する工程であって、前記第2熱処理工程は400ないし1300℃の温度範囲で熱処理する工程であることを特徴とする請求項5に記載の薄膜トランジスタ製造方法。
- 前記ゲート絶縁膜は100ないし1500Åの厚さで形成することを特徴とする請求項1に記載の薄膜トランジスタ製造方法。
- 前記屈折率は工程パワーに比例して、アンモニア/シランガスの比に反比例することを特徴とする請求項1に記載の薄膜トランジスタ製造方法。
- 前記キャッピング層はシリコン窒化膜であることを特徴とする請求項1に記載の薄膜トランジスタ製造方法。
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CN (1) | CN100481350C (ja) |
Cited By (11)
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JP2007311761A (ja) * | 2006-05-18 | 2007-11-29 | Samsung Sdi Co Ltd | 薄膜トランジスタの製造方法 |
JP2007311767A (ja) * | 2006-05-18 | 2007-11-29 | Samsung Sdi Co Ltd | Cmos薄膜トランジスタの製造方法 |
JP2008311649A (ja) * | 2007-06-13 | 2008-12-25 | Samsung Sdi Co Ltd | 薄膜トランジスタ、その製造方法、及びこれを含む有機電界発光表示装置 |
JP2009021525A (ja) * | 2007-07-13 | 2009-01-29 | Furukawa Electric Co Ltd:The | 多結晶シリコン薄膜の製造方法、多結晶シリコン薄膜基板および多結晶シリコン薄膜型太陽電池 |
JP2009049419A (ja) * | 2007-08-22 | 2009-03-05 | Samsung Sdi Co Ltd | 薄膜トランジスタ、これを具備した有機電界発光表示装置、およびこれらの製造方法 |
JP2010021556A (ja) * | 2008-07-14 | 2010-01-28 | Samsung Mobile Display Co Ltd | 薄膜トランジスタ、その製造方法及びこれを含む有機発光ダイオード表示装置 |
US8174012B2 (en) | 2006-11-10 | 2012-05-08 | Samsung Mobile Display Co., Ltd. | Organic light emitting diode display device and method of manufacturing the same |
US8283668B2 (en) | 2007-08-23 | 2012-10-09 | Samsung Display Co., Ltd. | Thin film transistor, method of fabricating the same, and organic light emitting diode display device including the same |
US8318523B2 (en) | 2008-04-11 | 2012-11-27 | Samsung Display Co., Ltd. | Thin film transistor, method of fabricating the same and organic light emitting diode display device having the same |
US8436360B2 (en) | 2008-03-27 | 2013-05-07 | Samsung Display Co., Ltd. | Thin film transistor, method of fabricating the same, and organic lighting emitting diode display device including the same |
US8790967B2 (en) | 2007-05-31 | 2014-07-29 | Samsung Display Co., Ltd. | Method of fabricating polycrystalline silicon layer, TFT fabricated using the same, method of fabricating TFT, and organic light emitting diode display device having the same |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100477103B1 (ko) * | 2001-12-19 | 2005-03-18 | 삼성에스디아이 주식회사 | 금속유도화 측면결정화방법을 이용한 멀티플 게이트 박막트랜지스터 및 그의 제조방법 |
KR100741975B1 (ko) * | 2005-08-25 | 2007-07-23 | 삼성에스디아이 주식회사 | 열처리 장치 및 이를 이용한 열처리 방법 |
KR100731756B1 (ko) * | 2006-06-07 | 2007-06-22 | 삼성에스디아이 주식회사 | 박막트랜지스터의 제조방법 |
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JP2009049419A (ja) * | 2007-08-22 | 2009-03-05 | Samsung Sdi Co Ltd | 薄膜トランジスタ、これを具備した有機電界発光表示装置、およびこれらの製造方法 |
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US8436360B2 (en) | 2008-03-27 | 2013-05-07 | Samsung Display Co., Ltd. | Thin film transistor, method of fabricating the same, and organic lighting emitting diode display device including the same |
US8318523B2 (en) | 2008-04-11 | 2012-11-27 | Samsung Display Co., Ltd. | Thin film transistor, method of fabricating the same and organic light emitting diode display device having the same |
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KR100611766B1 (ko) | 2006-08-10 |
US20060046357A1 (en) | 2006-03-02 |
CN1741256A (zh) | 2006-03-01 |
US7615421B2 (en) | 2009-11-10 |
JP4307371B2 (ja) | 2009-08-05 |
KR20060018533A (ko) | 2006-03-02 |
CN100481350C (zh) | 2009-04-22 |
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