JP2017508275A - 低温ポリシリコン薄膜トランジスタ及びその製造方法 - Google Patents
低温ポリシリコン薄膜トランジスタ及びその製造方法 Download PDFInfo
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- 229910021420 polycrystalline silicon Inorganic materials 0.000 title claims abstract description 49
- 229920005591 polysilicon Polymers 0.000 title claims abstract description 48
- 239000010409 thin film Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 239000002131 composite material Substances 0.000 claims abstract description 25
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 17
- 239000010408 film Substances 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 15
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 claims description 12
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 12
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 6
- 238000005468 ion implantation Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000002019 doping agent Substances 0.000 claims description 3
- 238000005224 laser annealing Methods 0.000 claims description 3
- 238000004544 sputter deposition Methods 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 2
- 230000003071 parasitic effect Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 7
- 239000011521 glass Substances 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 238000001994 activation Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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Abstract
Description
Claims (10)
- 絶縁基板を提供するステップと、
前記絶縁基板の緩衝層上に少なくとも、表面に所属する低温ポリシリコン薄膜トランジスタのソース領域、ドレイン領域及びチャネル領域有するポリシリコン層を形成するステップと、
少なくとも3回のPECVD工程を順次に行って、前記チャネル領域上に少なくとも3層の誘電層を順次に形成して複合ゲート電極絶縁層を構成し、各層の誘電層の緊密度が製造過程で形成される順に従って大きくなるステップと、
前記複合ゲート電極絶縁層上にゲート電極を形成するステップとを含むことを特徴とする低温ポリシリコン薄膜トランジスタの製造方法。 - 前記複合ゲート電極絶縁層は、第1の誘電層、第2の誘電層及び第3の誘電層によって構成され、前記第1の誘電層はSiO2であり、前記第2の誘電層はSiONであり、前記第3の誘電層はSiNxであることを特徴とする請求項1に記載の低温ポリシリコン薄膜トランジスタの製造方法。
- 前記第1の誘電層の厚さは、前記第2の誘電層の厚さ及び前記第3の誘電層の厚さよりも大きいことを特徴とする請求項2に記載の低温ポリシリコン薄膜トランジスタの製造方法。
- 前記第1の誘電層のSiO2膜の厚さ範囲は1000〜1500オングストロームであり、前記第2の誘電層のSiON膜の厚さ範囲は100〜1000オングストロームであり、前記第3の誘電層のSiNx膜の厚さ範囲は100〜500オングストロームであることを特徴とする請求項3に記載の低温ポリシリコン薄膜トランジスタの製造方法。
- 前記ポリシリコン層を形成するステップは、
スパッタリング工程によって前記絶縁基板の表面にアモルファスシリコン層を形成する工程と、
アニーリング工程によって前記アモルファスシリコン層を再結晶させて前記ポリシリコン層を形成する工程と、を含み、
前記アニーリング工程は、エキシマレーザアニーリング工程を含むことを特徴とする請求項1に記載の低温ポリシリコン薄膜トランジスタの製造方法。 - 前記ゲート電極を形成した後に、前記ゲート電極をマスクとするイオン注入工程をさらに行って、前記ソース領域及び前記ドレイン領域内の前記ポリシリコンにソース電極及びドレイン電極をそれぞれ形成し、
前記イオン注入工程を行った後に、活性化工程をさらに行って、前記ソース電極及び前記ドレイン電極内のドーパントを活性化させることを特徴とする請求項1に記載の低温ポリシリコン薄膜トランジスタの製造方法。 - 少なくともゲート電極絶縁層を備え、
前記ゲート電極絶縁層は、少なくとも3層の誘電層による複合絶縁層であり、各層の誘電層の緊密度は、製造過程で形成される順に従って大きくなることを特徴とする低温ポリシリコン薄膜トランジスタ。 - 前記ゲート電極絶縁層は、第1の誘電層、第2の誘電層及び第3の誘電層によって構成され、前記第1の誘電層はSiO2であり、前記第2の誘電層はSiONであり、前記第3の誘電層はSiNxであることを特徴とする請求項7に記載の低温ポリシリコン薄膜トランジスタ。
- 前記第1の誘電層の厚さは、前記第2の誘電層の厚さ及び前記第3の誘電層の厚さよりも大きいことを特徴とする請求項8に記載の低温ポリシリコン薄膜トランジスタ。
- 前記第1の誘電層のSiO2膜の厚さ範囲は1000〜1500オングストロームであり、前記第2の誘電層のSiON膜の厚さ範囲は100〜1000オングストロームであり、前記第3の誘電層のSiNx膜の厚さ範囲は100〜500オングストロームであることを特徴とする請求項9に記載の低温ポリシリコン薄膜トランジスタ。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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CN201310727131.5A CN103762178A (zh) | 2013-12-25 | 2013-12-25 | 一种低温多晶硅薄膜晶体管及其制造方法 |
CN201310727131.5 | 2013-12-25 | ||
PCT/CN2014/071266 WO2015096264A1 (zh) | 2013-12-25 | 2014-01-23 | 一种低温多晶硅薄膜晶体管及其制造方法 |
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CN106469750A (zh) * | 2015-08-19 | 2017-03-01 | 昆山工研院新型平板显示技术中心有限公司 | 薄膜晶体管及其制造方法 |
CN106229347B (zh) * | 2016-08-24 | 2019-06-07 | 武汉华星光电技术有限公司 | 一种低温多晶硅薄膜晶体管及其制造方法 |
CN106601822A (zh) * | 2016-12-22 | 2017-04-26 | 武汉华星光电技术有限公司 | 一种薄膜晶体管及其制备方法 |
CN107424920A (zh) * | 2017-04-24 | 2017-12-01 | 武汉华星光电技术有限公司 | 栅极绝缘膜层制作方法 |
CN107393968A (zh) * | 2017-08-28 | 2017-11-24 | 武汉华星光电半导体显示技术有限公司 | 显示器件及其制备方法 |
KR102041048B1 (ko) * | 2018-05-16 | 2019-11-06 | 한국과학기술원 | 유기 절연체 3중층으로 이루어진 전하 트랩 구조와 이를 이용한 비휘발성 메모리 |
CN109119484B (zh) * | 2018-07-16 | 2021-06-18 | 惠科股份有限公司 | 薄膜晶体管及薄膜晶体管的制造方法 |
CN109616510B (zh) | 2018-12-03 | 2020-04-14 | 惠科股份有限公司 | 薄膜晶体管结构及其制作方法、显示装置 |
CN109545690A (zh) * | 2018-12-03 | 2019-03-29 | 惠科股份有限公司 | 薄膜晶体管结构及其制作方法、显示装置 |
KR20210008264A (ko) | 2019-07-12 | 2021-01-21 | 삼성디스플레이 주식회사 | 박막트랜지스터와 그것을 구비한 디스플레이 장치 및 그들의 제조방법 |
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GB2535404B (en) | 2019-12-11 |
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KR101872629B1 (ko) | 2018-08-02 |
GB2535404A (en) | 2016-08-17 |
WO2015096264A1 (zh) | 2015-07-02 |
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