JP2007251179A - 結晶化パターンおよびこれを用いた非晶質シリコンの結晶化方法 - Google Patents
結晶化パターンおよびこれを用いた非晶質シリコンの結晶化方法 Download PDFInfo
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- 238000002425 crystallisation Methods 0.000 title claims abstract description 94
- 230000008025 crystallization Effects 0.000 title claims abstract description 89
- 229910021417 amorphous silicon Inorganic materials 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 65
- 239000000758 substrate Substances 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims abstract description 12
- 239000010409 thin film Substances 0.000 claims abstract description 12
- 239000010408 film Substances 0.000 claims abstract description 11
- 230000001678 irradiating effect Effects 0.000 claims abstract description 10
- 239000011521 glass Substances 0.000 claims abstract description 9
- 238000000059 patterning Methods 0.000 claims abstract description 6
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 46
- 230000006698 induction Effects 0.000 claims description 20
- 230000008023 solidification Effects 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052710 silicon Inorganic materials 0.000 abstract description 4
- 239000010703 silicon Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 description 35
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005224 laser annealing Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- 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
- H01L21/02656—Special treatments
- H01L21/02664—Aftertreatments
- H01L21/02667—Crystallisation or recrystallisation of non-monocrystalline semiconductor materials, e.g. regrowth
- H01L21/02675—Crystallisation or recrystallisation of non-monocrystalline semiconductor materials, e.g. regrowth using laser beams
- H01L21/02678—Beam shaping, e.g. using a mask
- H01L21/0268—Shape of mask
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- H—ELECTRICITY
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- 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
- H01L21/02367—Substrates
- H01L21/0237—Materials
- H01L21/02422—Non-crystalline insulating materials, e.g. glass, polymers
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- 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
- H01L21/02518—Deposited layers
- H01L21/02521—Materials
- H01L21/02524—Group 14 semiconducting materials
- H01L21/02532—Silicon, silicon germanium, germanium
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1259—Multistep manufacturing methods
- H01L27/127—Multistep manufacturing methods with a particular formation, treatment or patterning of the active layer specially adapted to the circuit arrangement
- H01L27/1274—Multistep manufacturing methods with a particular formation, treatment or patterning of the active layer specially adapted to the circuit arrangement using crystallisation of amorphous semiconductor or recrystallisation of crystalline semiconductor
- H01L27/1285—Multistep manufacturing methods with a particular formation, treatment or patterning of the active layer specially adapted to the circuit arrangement using crystallisation of amorphous semiconductor or recrystallisation of crystalline semiconductor using control of the annealing or irradiation parameters, e.g. using different scanning direction or intensity for different transistors
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1259—Multistep manufacturing methods
- H01L27/1296—Multistep manufacturing methods adapted to increase the uniformity of device parameters
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- H—ELECTRICITY
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- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/04—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their crystalline structure, e.g. polycrystalline, cubic or particular orientation of crystalline planes
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- Condensed Matter Physics & Semiconductors (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Ceramic Engineering (AREA)
- Optics & Photonics (AREA)
- Materials Engineering (AREA)
- Thin Film Transistor (AREA)
- Recrystallisation Techniques (AREA)
Abstract
【解決手段】 本発明は、多結晶シリコン薄膜トランジスタを製造するための非晶質シリコンの結晶化方法であって、ガラス基板上に非晶質シリコン膜を形成するステップと、前記非晶質シリコン膜を薄膜トランジスタのアクティブパターンの形態でパターニングして結晶化パターンを形成するステップと、前記結晶化パターンにレーザを照射して多結晶シリコンで結晶化させるステップと、を含み、前記結晶化パターンは、縁部から第1距離以内に位置する周辺領域と、前記縁部から第1距離以上離れて位置する内部領域とを含み、前記内部領域は少なくとも1つ以上の区域に分割され、前記各区域は1つの結晶化誘導パターンを備えると共に、対応する結晶化誘導パターンから第2距離以内に位置するようにしたことを特徴とする。
【選択図】 図4
Description
(Sequential Lateral Solidification;以下、SLS)法とがある。
ここで、前記第1距離は、臨界側面成長長さであることを特徴とする。
前記結晶化誘導パターンは、ホール(hole)パターンまたはディンプル(dimple)パターンであることを特徴とする。
前記第2距離は、第1距離以下の長さであることを特徴とする。
まず、本発明の技術的原理を説明すれば、本発明はガラス基板上にa−Siを蒸着した後、これをTFTのアクティブパターンの形態でパターニングして結晶化パターンを形成し、その後、この結晶化パターンに対してのみ選択的にレーザを照射してpoly−Siに結晶化させる。特に、前記a−Siのパターニング時には内部の任意の位置に多数の結晶化誘導パターン(Crystallization Derivation Pattern)を形成する。
(dimple)パターンなどのような結晶化誘導パターン(Crystallization Derivation
Pattern)を挿入し、このような状態でa−Siパターンに対する結晶化を行う。
2、2a、10、10a 非晶質シリコンパターン
3、14、24 大きい結晶粒多結晶シリコン
3a、14a 小さい結晶粒多結晶シリコン
12、12a 突出部
20 結晶化パターン
22 結晶化誘導パターン
30 マスク
Claims (11)
- レーザを照射して多結晶シリコンに結晶化させるための非晶質シリコンからなる結晶化パターンであって、
縁部から第1距離以内に位置する周辺領域と、前記縁部から第1距離以上離れて位置する内部領域とを含み、
前記内部領域は少なくとも1つ以上の区域に分割され、
前記各区域は1つの結晶化誘導パターンを備えると共に、対応する結晶化誘導パターンから第2距離以内に位置するようにしたことを特徴とする結晶化パターン。 - 前記第1距離は、臨界側面成長長さであることを特徴とする請求項1に記載の結晶化パターン。
- 前記第2距離は、第1距離以下の長さであることを特徴とする請求項1に記載の結晶化パターン。
- 前記結晶化誘導パターンは、ホール(hole)パターンまたはディンプル(dimple)パターンであることを特徴とする請求項1に記載の結晶化パターン。
- 多結晶シリコン薄膜トランジスタを製造するための非晶質シリコンの結晶化方法であって、
ガラス基板上に非晶質シリコン膜を形成するステップと、
前記非晶質シリコン膜を薄膜トランジスタのアクティブパターンの形態でパターニングして結晶化パターンを形成するステップと、
前記結晶化パターンにレーザを照射して多結晶シリコンに結晶化させるステップと、を含み、
前記結晶化パターンは、縁部から第1距離以内に位置する周辺領域と、前記縁部から第1距離以上離れて位置する内部領域とを含み、前記内部領域は少なくとも1つ以上の区域に分割され、前記各区域は1つの結晶化誘導パターンを備えると共に、対応する結晶化誘導パターンから第2距離以内に位置するようにしたことを特徴とする非晶質シリコンの結晶化方法。 - 前記第1距離は、臨界側面成長長さであることを特徴とする請求項5に記載の非晶質シリコンの結晶化方法。
- 前記第2距離は、第1距離以下の長さであることを特徴とする請求項5に記載の非晶質シリコンの結晶化方法。
- 前記結晶化誘導パターンは、ホールパターンまたはディンプルパターンであることを特徴とする請求項5に記載の非晶質シリコンの結晶化方法。
- 前記結晶化パターンへのレーザ照射はSLS(Sequential Lateral Solidification)法により遂行することを特徴とする請求項5に記載の非晶質シリコンの結晶化方法。
- 前記SLS法によるレーザ照射は、結晶化パターンを全部露出させるボックス型マスクを使用して遂行することを特徴とする請求項9に記載の非晶質シリコンの結晶化方法。
- 前記ボックス型マスクを使用したレーザ照射は、1回だけ遂行することを特徴とする請求項10に記載の非晶質シリコンの結晶化方法。
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JP2001144300A (ja) * | 1999-08-31 | 2001-05-25 | Fujitsu Ltd | 半導体装置及びその製造方法並びにシリコン薄膜の形成方法 |
JP2001274088A (ja) * | 2001-02-28 | 2001-10-05 | Trustees Of Columbia Univ In The City Of New York | 基板上の半導体膜領域の結晶化処理及びこの方法により製造されたデバイス |
JP2003243306A (ja) * | 2001-12-11 | 2003-08-29 | Semiconductor Energy Lab Co Ltd | 半導体装置の作製方法 |
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JP2003282438A (ja) * | 2002-03-27 | 2003-10-03 | Seiko Epson Corp | 半導体装置の製造方法及び半導体装置、電気光学装置、電子機器 |
WO2004049412A2 (en) * | 2002-11-27 | 2004-06-10 | Canon Kabushiki Kaisha | Producing method for crystalline thin film |
JP4443878B2 (ja) | 2003-08-29 | 2010-03-31 | シャープ株式会社 | 多結晶半導体膜の形成方法及び半導体デバイスの製造方法 |
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JP2001144300A (ja) * | 1999-08-31 | 2001-05-25 | Fujitsu Ltd | 半導体装置及びその製造方法並びにシリコン薄膜の形成方法 |
JP2001274088A (ja) * | 2001-02-28 | 2001-10-05 | Trustees Of Columbia Univ In The City Of New York | 基板上の半導体膜領域の結晶化処理及びこの方法により製造されたデバイス |
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