JP2004146809A - デュアルまたはマルチプルゲートを使用するtftの製造方法 - Google Patents
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 239000013078 crystal Substances 0.000 claims abstract description 94
- 239000000758 substrate Substances 0.000 claims abstract description 26
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 19
- 230000009977 dual effect Effects 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 16
- 239000011159 matrix material Substances 0.000 description 10
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- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 2
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- 230000002411 adverse Effects 0.000 description 1
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- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 1
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Abstract
【解決手段】デュアルまたはマルチプルゲートを使用するTFTの製造方法において、TFT基板を形成する多結晶シリコンの結晶粒の大きさGsと前記ゲートのアクティブチャンネル方向の垂直方向に対して“プライマリー”結晶粒境界が傾いた角度θ、アクティブチャンネル幅及びアクティブチャンネル長さが定められた場合、前記アクティブチャンネル長さに沿うアクティブチャンネル領域内の結晶粒境界の最大数Nmaxが含まれる確率値を計算する段階;及び、前記デュアルまたはマルチプルゲートTFTの各アクティブチャンネル領域内の結晶粒境界の数を同期化できる前記アクティブチャンネル間の間隔を調整する段階を含む。
【選択図】図3
Description
したがって、P+Q=1で、P=(a+b)/Gsと定義する。
D=(L+x)×cosθで、x=W×tanθである。
D=(L+Wtanθ)×cosθ=Lcosθ+Wtanθcosθで、
tanθcosθ=sinθであるので、
つまり、D=Lcosθ+Wsinθである。
したがって、前記最大距離Dはアクティブチャンネル領域の長さLと幅W、そして法線Nに対する“プライマリー”結晶粒境界の傾いた角度θだけの関数で表すことができる。
Nmax=ξ(D/Gs)、
ここで、関数ξは次のように定義される。
ξ(x)=最小の整数≧x,x=任意の数である。
すなわち、xが2であればNmax=2であり、x=2.3であればNmax=3になる関数であることが分かる。
(数1)
P=(D−(Nmax−1)×Gs)/Gsで、
(数2)
Q=1−P=1−(D−(Nmax−1)×Gs/Gs)=(−D+Nmax×Gs)/Gsになる。
a)P=0の場合
アクティブチャンネル領域内にはNmax−1個の“プライマリー”結晶粒境界の最大数Nmaxが含まれる確率は0で、よって、アクティブチャンネル領域内にはNmax−1個の“プライマリー”結晶粒境界の数のみが存在できる。 b)0<P<0.5の場合
アクティブチャンネル領域内にNmax個の“プライマリー”結晶粒境界の数が存在する確率はNmax−1個の境界の数が存在する確率よりも低い。
c)P=0.5の場合
アクティブチャンネル領域内にNmax個の“プライマリー”結晶粒境界の数を含む確率がNmax−1個の境界の数を含む確率と同じである。
d)0.5<P<1の場合
アクティブチャンネル領域内にNmax個の“プライマリー”結晶粒境界の数を含む確率がNmax−1個の境界の数を含む確率と同じである。
e)P=1の場合
アクティブチャンネル領域内に“プライマリー”結晶粒境界の最大数Nmaxを含む確率は1で、よって、アクティブチャンネル領域内ではNmax個の“プライマリー”結晶粒境界の数のみが存在できる。
このとき、前記確率Pを表す式でD=Lになり(図4(A)、4(B))、前記Pはこれ以上W及びθの関数ではない。このとき、確率Pは次のように表すことができる。
P=(L−(Nmax−1)×Gs)/Gs
このとき、アクティブチャンネル領域内にNmax−1個の“プライマリー”結晶粒境界の数を含む確率QはP+Q=1であるので、
Q=1−P=1−(L−(Nmax−1)×Gs))/Gs=(−L+Nmax×Gs)/Gsである。
(数3)
S=mGs secθ−Lであり、
ここで、Gsは結晶粒の大きさ、mは1,2,3,・・・整数>0、θはアクティブチャンネル方向の垂直方向に対して致命的な結晶粒境界(“プライマリー”結晶粒境界)が傾く角度、Lはデュアルまたはマルチプルゲート各々のアクティブチャンネル長さである。
θ=0の場合、secθ=1で、
よって、S=mGs−Lで表現されることができる。
Claims (5)
- デュアルまたはマルチプルゲートを使用するTFTの製造方法において、
TFT基板を形成する多結晶シリコンの結晶粒の大きさGsと前記ゲートのアクティブチャンネル方向の垂直方向に対して“プライマリー”結晶粒境界が傾いた角度θ、アクティブチャンネル幅及びアクティブチャンネル長さが定められた場合、前記アクティブチャンネル長さに沿うアクティブチャンネル領域内の結晶粒境界の最大数Nmaxが含まれる確率値を計算する段階と、
前記デュアルまたはマルチプルゲートTFTの各アクティブチャンネル領域内の結晶粒境界の数を同期化できる前記アクティブチャンネル間の間隔を調整する段階と、
を有することを特徴とするデュアルまたはマルチプルゲートを使用するTFTの製造方法。 - 前記確率は数1によって計算されることを特徴とする、請求項1に記載のデュアルまたはマルチプルゲートを使用するTFTの製造方法:
(数1)
P=(D−(Nmax−1)×Gs)/Gs
ここで、D=Lcosθ+Wsinθ、LはTFTのアクティブチャンネルの長さ、WはTFTのアクティブチャンネルの幅、Nmaxは長さがL、幅がWであるTFTのアクティブチャンネル領域内に含まれるプライマリー結晶粒境界の最大数、Gsは結晶粒の大きさ、θはTFTのアクティブチャンネル方向の垂直方向に対してプライマリー結晶粒境界が傾く角度、mは1,2,3,・・・整数>0、LはデュアルまたはマルチプルゲートTFT各々のアクティブチャンネルの長さを表す。 - 前記アクティブチャンネル間の間隔は数2によって計算されるものであることを特徴とする、請求項1または2に記載のデュアルまたはマルチプルゲートを使用するTFTの製造方法:
(数2)
S=mGs secθ−Lであり、
ここで、Gsは結晶粒の大きさ、mは1,2,3,・・・整数>0、θはアクティブチャンネル方向の垂直方向に対して致命的な結晶粒境界(“プライマリー”結晶粒境界)が傾く角度、Lはデュアルまたはマルチプルゲート各々のアクティブチャンネルの長さである。 - 前記角度は−45゜≦θ≦45゜であることを特徴とする、請求項3に記載のデュアルまたはマルチプルゲートを使用するTFTの製造方法。
- 前記アクティブチャンネル間の間隔を調整する段階は、前記確率値が0.5とならないように調整することを特徴とする、請求項3に記載のデュアルまたはマルチプルゲートを使用するTFTの製造方法。
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KR100303142B1 (ko) * | 1999-10-29 | 2001-11-02 | 구본준, 론 위라하디락사 | 액정표시패널의 제조방법 |
FR2801396B1 (fr) * | 1999-11-22 | 2002-11-08 | Canon Kk | Convertion en mode point de donnees numeriques |
KR100660814B1 (ko) * | 1999-12-31 | 2006-12-26 | 엘지.필립스 엘시디 주식회사 | 박막트랜지스터의 반도체층 형성방법 |
JP2001345454A (ja) | 2000-03-27 | 2001-12-14 | Semiconductor Energy Lab Co Ltd | 半導体装置およびその作製方法 |
JP2001345451A (ja) * | 2000-05-30 | 2001-12-14 | Hitachi Ltd | 薄膜半導体集積回路装置、それを用いた画像表示装置、及びその製造方法 |
US6602765B2 (en) * | 2000-06-12 | 2003-08-05 | Seiko Epson Corporation | Fabrication method of thin-film semiconductor device |
JP2002246608A (ja) | 2000-11-09 | 2002-08-30 | Semiconductor Energy Lab Co Ltd | 半導体装置 |
KR100483985B1 (ko) * | 2001-11-27 | 2005-04-15 | 삼성에스디아이 주식회사 | 박막 트랜지스터용 다결정 실리콘 박막 및 이를 사용한디바이스 |
KR100462862B1 (ko) * | 2002-01-18 | 2004-12-17 | 삼성에스디아이 주식회사 | 티에프티용 다결정 실리콘 박막 및 이를 이용한디스플레이 디바이스 |
KR100483987B1 (ko) * | 2002-07-08 | 2005-04-15 | 삼성에스디아이 주식회사 | 티에프티용 다결정 실리콘 박막 및 이를 사용한 디바이스 |
-
2002
- 2002-10-21 KR KR10-2002-0064366A patent/KR100454751B1/ko active IP Right Grant
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2003
- 2003-09-22 JP JP2003329609A patent/JP4338488B2/ja not_active Expired - Fee Related
- 2003-10-03 US US10/677,278 patent/US7011992B2/en not_active Expired - Lifetime
- 2003-10-17 CN CNB2003101024062A patent/CN100361283C/zh not_active Expired - Lifetime
- 2003-10-21 EP EP03090360A patent/EP1414062A3/en not_active Withdrawn
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2006
- 2006-01-11 US US11/329,030 patent/US7482179B2/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100171546A1 (en) * | 2007-06-22 | 2010-07-08 | The Hong Kong University Of Science And Technology | Polycrystalline silicon thin film transistors with bridged-grain structures |
US8426865B2 (en) * | 2007-06-22 | 2013-04-23 | The Hong Kong University Of Science And Technology | Polycrystalline silicon thin film transistors with bridged-grain structures |
Also Published As
Publication number | Publication date |
---|---|
KR100454751B1 (ko) | 2004-11-03 |
EP1414062A3 (en) | 2008-04-23 |
EP1414062A2 (en) | 2004-04-28 |
US7482179B2 (en) | 2009-01-27 |
CN1497685A (zh) | 2004-05-19 |
CN100361283C (zh) | 2008-01-09 |
US20040077132A1 (en) | 2004-04-22 |
US20060110864A1 (en) | 2006-05-25 |
JP4338488B2 (ja) | 2009-10-07 |
US7011992B2 (en) | 2006-03-14 |
KR20040034270A (ko) | 2004-04-28 |
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