JP6781872B2 - レーザ照射装置および薄膜トランジスタの製造方法 - Google Patents
レーザ照射装置および薄膜トランジスタの製造方法 Download PDFInfo
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- JP6781872B2 JP6781872B2 JP2016142773A JP2016142773A JP6781872B2 JP 6781872 B2 JP6781872 B2 JP 6781872B2 JP 2016142773 A JP2016142773 A JP 2016142773A JP 2016142773 A JP2016142773 A JP 2016142773A JP 6781872 B2 JP6781872 B2 JP 6781872B2
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- 239000010409 thin film Substances 0.000 title claims description 311
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 115
- 229920005591 polysilicon Polymers 0.000 claims description 115
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 64
- 230000005540 biological transmission Effects 0.000 claims description 29
- 230000001678 irradiating effect Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 238000005224 laser annealing Methods 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 description 57
- 239000000758 substrate Substances 0.000 description 57
- 239000004973 liquid crystal related substance Substances 0.000 description 13
- 230000003287 optical effect Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 10
- 230000027756 respiratory electron transport chain Effects 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000012935 Averaging Methods 0.000 description 4
- 239000010408 film Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
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Description
図1は、本発明の第1の実施形態におけるレーザ照射装置10の構成例を示す図である。
本発明の第2の実施形態は、マイクロレンズアレイ13の代わりに、1個の投影レンズ18を用いて、レーザアニールを行う場合の実施形態である。
11 レーザ光源
12 カップリング光学系
13 マイクロレンズアレイ
14 レーザ光
15 投影マスクパターン
16 透過領域
17 マイクロレンズ
18 投影レンズ
20 薄膜トランジスタ
21 アモルファスシリコン薄膜
22 ポリシリコン薄膜
23 ソース
24 ドレイン
25 領域
30 ガラス基板
Claims (9)
- レーザ光を発生する光源と、
薄膜トランジスタに被着されたアモルファスシリコン薄膜の互いに異なる複数の領域に前記レーザ光を照射する投影レンズと、を備え、
前記投影レンズは、前記薄膜トランジスタのソース電極とドレイン電極の間が複数のチャネル領域によって並列して接続されるように、前記アモルファスシリコン薄膜の前記互いに異なる複数の領域に前記レーザ光を照射する、
レーザ照射装置。 - 前記投影レンズは、前記アモルファスシリコン薄膜の前記互いに異なる複数の領域に前記レーザ光を照射して、当該アモルファスシリコン薄膜をレーザアニールしてポリシリコン薄膜を形成する
ことを特徴とする請求項1に記載のレーザ照射装置。 - 前記投影レンズは、前記互いに異なる複数の領域の各々に対して、所定の回数の前記レーザ光を照射する
ことを特徴とする請求項1または2に記載のレーザ照射装置。 - 前記投影レンズは、複数のマイクロレンズであることを特徴とする
ことを特徴とする請求項1乃至3のいずれか1項に記載のレーザ照射装置。 - 前記複数のマイクロレンズ上に配置され、前記互いに異なる複数の領域に対応するレーザ光の透過領域が設けられた複数の投影マスクを、さらに備え、
前記複数の投影マスクの各々は、少なくとも一つのマイクロレンズに割り当てられることを特徴とする請求項4に記載のレーザ照射装置。 - 薄膜トランジスタに含まれるソース電極とドレイン電極との間に被着されたアモルファスシリコン薄膜の第1の領域にレーザ光を照射して、ポリシリコン薄膜を形成する第1のステップと、
前記第1の領域に前記レーザ光を照射した後、前記アモルファスシリコン薄膜の第2の領域に前記レーザ光を照射して、前記ポリシリコン薄膜を形成する第2のステップと、を含み、
前記第2のステップにおいて、前記ソース電極と前記ドレイン電極の間が複数の前記ポリシリコン薄膜によって並列して接続されるように、前記アモルファスシリコン薄膜において前記第1の領域とは異なる前記第2の領域に前記レーザ光を照射する、
薄膜トランジスタの製造方法。 - 前記第1のステップおよび前記第2のステップにおいて、前記アモルファスシリコン薄膜に前記レーザ光を照射して、当該アモルファスシリコン薄膜をレーザアニールすることにより、前記ポリシリコン薄膜を形成すること、
を特徴とする請求項6に記載の薄膜トランジスタの製造方法。 - 前記第1のステップにおいて、前記第1の領域に対して、第1のマイクロレンズを用いて前記レーザ光を照射し、
前記第2のステップにおいて、前記第2の領域に対して、第2のマイクロレンズを用いて前記レーザ光を照射すること
を特徴とする請求項6または7に記載の薄膜トランジスタの製造方法。 - 前記第1のステップにおいて、前記第1の領域に対応する透過領域が設けられた第1の投影マスクを介して、前記レーザ光を前記アモルファスシリコン薄膜に照射し、
前記第2のステップにおいて、前記第2の領域に対応する透過領域が設けられた第2の投影マスクを介して、前記レーザ光を前記アモルファスシリコン薄膜に照射すること
を特徴とする請求項6乃至8のいずれか1項に記載の薄膜トランジスタの製造方法。
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