JP2014123723A - 薄膜トランジスタ及びその製造方法、アレイ基板、ディスプレー装置 - Google Patents
薄膜トランジスタ及びその製造方法、アレイ基板、ディスプレー装置 Download PDFInfo
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- 239000010409 thin film Substances 0.000 title claims abstract description 116
- 239000000758 substrate Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 238000005530 etching Methods 0.000 claims abstract description 118
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 62
- 239000001257 hydrogen Substances 0.000 claims abstract description 62
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000010410 layer Substances 0.000 claims description 248
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 37
- 229910000077 silane Inorganic materials 0.000 claims description 37
- 239000007789 gas Substances 0.000 claims description 25
- 239000011241 protective layer Substances 0.000 claims description 23
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 22
- 239000004065 semiconductor Substances 0.000 claims description 15
- 229910052738 indium Inorganic materials 0.000 claims description 11
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 11
- 239000011787 zinc oxide Substances 0.000 claims description 11
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 7
- 238000001755 magnetron sputter deposition Methods 0.000 claims description 5
- 229910001195 gallium oxide Inorganic materials 0.000 claims description 4
- 229910003437 indium oxide Inorganic materials 0.000 claims description 4
- 230000008021 deposition Effects 0.000 abstract description 33
- 238000000151 deposition Methods 0.000 description 34
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 20
- 229910052814 silicon oxide Inorganic materials 0.000 description 20
- -1 hydrogen ions Chemical class 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 13
- 238000000354 decomposition reaction Methods 0.000 description 11
- 239000004973 liquid crystal related substance Substances 0.000 description 8
- 229910044991 metal oxide Inorganic materials 0.000 description 8
- 150000004706 metal oxides Chemical class 0.000 description 8
- 229910052581 Si3N4 Inorganic materials 0.000 description 6
- 239000010408 film Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 6
- 230000014509 gene expression Effects 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 238000000427 thin-film deposition Methods 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- 229910016048 MoW Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 229910052750 molybdenum Inorganic materials 0.000 description 4
- 229920002120 photoresistant polymer Polymers 0.000 description 4
- 229910052733 gallium Inorganic materials 0.000 description 3
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 210000002858 crystal cell Anatomy 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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Abstract
【解決手段】ベース基板と、ゲート電極と、活性層と、ソース・トレイン電極と、画素電極と、一つ又は複数の絶縁層とを含み、その中で、少なくとも一つの絶縁層がボトム絶縁層及びトップ絶縁層を含み、前記トップ絶縁層中の水素含有量が前記ボトム絶縁層中の水素含有量よりも高いことを特徴とする薄膜トランジスタ及びその製造方法、アレイ基板、ディスプレー装置。
【選択図】図3
Description
ベース基板20の上にゲート電極21を形成するステップ2aと、
ベース基板20とゲート電極21を覆うようにゲート絶縁層22を形成するステップ2bと、
ゲート絶縁層22のゲート電極21に対応する上方に活性層23を形成するステップ2cと、
活性層23の上方にボトムエッチングストップ層24aを形成するステップ2dと、
ボトムエッチングストップ層24aの上方にトップエッチングストップ層24bを形成するステップ2eと、
トップエッチングストップ層24bの上方にソース・トレイン電極25を形成するステップ2fと、
ゲート絶縁層22、ソース・トレイン電極25及びトップエッチングストップ層24bを覆うように保護層26を形成するステップ2gと、
ソース・トレイン電極25と保護層26の上方に画素電極27を形成するステップ2hと、を含む。
11、21 ゲート電極
12、22 ゲート絶縁層
13、23 活性層
14 エッチングストップ層
24a ボトムエッチングストップ層
24b トップエッチングストップ層
15、25 ソース・トレイン電極
16、26 保護層
17、27 画素電極
Claims (15)
- ベース基板と、ゲート電極と、活性層と、ソース・トレイン電極と、画素電極と、一つ又は複数の絶縁層とを備え、少なくとも一つの絶縁層がボトム絶縁層及びトップ絶縁層を含み、前記トップ絶縁層中の水素含有量が前記ボトム絶縁層中の水素含有量よりも高い、ことを特徴とする薄膜トランジスタ。
- 前記薄膜トランジスタが酸化物薄膜トランジスタであり、前記酸化物薄膜トランジスタが複数の絶縁層を備え、前記複数の絶縁層がゲート絶縁層、エッチングストップ層及び保護層を含み、前記エッチングストップ層がボトムエッチングストップ層及びトップエッチングストップ層を含み、前記トップエッチングストップ層中の水素含有量が前記ボトムエッチングストップ層の水素含有量よりも高い、ことを特徴とする請求項1に記載の薄膜トランジスタ。
- 前記トップエッチングストップ層の水素含有量は5〜10%であり、前記ボトムエッチングストップ層の水素含有量は1〜5%である、ことを特徴とする請求項2に記載の薄膜トランジスタ。
- 前記酸化物薄膜トランジスタにおいて、
前記ゲート電極が前記ベース基板の上方に設けられ、
前記ゲート絶縁層が前記ベース基板と前記ゲート電極の上方を覆い、
前記活性層が前記ゲート絶縁層の前記ゲート電極に対応する上方に設けられ、
前記ボトムエッチングストップ層が前記活性層の上方に設けられ、
前記トップエッチングストップ層が前記ボトムエッチングストップ層の上方に設けられ、
前記ソース・トレイン電極が前記トップエッチングストップ層の上方に設けられ、
前記保護層が前記ゲート絶縁層、前記ソース・トレイン電極及び前記トップエッチングストップ層の上方を覆い、
前記画素電極が前記ソース・トレイン電極と前記保護層の上方に設けられる、
ことを特徴とする請求項2又は3に記載の薄膜トランジスタ。 - 前記ボトムエッチングストップ層の厚さが200〜1000オングストロームであり、前記トップエッチングストップ層の厚さは1000〜1500オングストロームである、ことを特徴とする請求項2から4の何れか一項に記載の薄膜トランジスタ。
- 前記活性層は、インジウム・ガリウム・亜鉛酸化物半導体又はインジウム・亜鉛酸化物半導体からなる、ことを特徴とする請求項2から4の何れか一項に記載の薄膜トランジスタ。
- 請求項1から6の何れか一項に記載の薄膜トランジスタを備える、ことを特徴とするアレイ基板。
- 請求項7に記載されたアレイ基板を含む、ことを特徴とするディスプレー装置。
- ベース基板の上にゲート電極、活性層、ソース・トレイン電極、一つ又は複数の絶縁層、及び画素電極を形成し、少なくとも一つの絶縁層を形成する際、順次にボトム絶縁層及びトップ絶縁層を形成し、前記トップ絶縁層中の水素含有量が前記ボトム絶縁層の水素含有量よりも高いようにする、ことを特徴とする薄膜トランジスタの製造方法。
- 前記薄膜トランジスタが酸化物薄膜トランジスタであり、前記少なくとも一つの絶縁層がエッチングストップ層を含み、前記製造方法は、順次にベース基板の上にゲート電極、ゲート絶縁層、活性層、エッチングストップ層、ソース・トレイン電極、保護層及び画素電極を形成し、前記エッチングストップ層を形成する際、順次にボトムエッチングストップ層及びトップエッチングストップ層を形成し、前記トップエッチングストップ層中の水素含有量が前記ボトムエッチングストップ層の水素含有量よりも高いようにする、ことを特徴とする請求項9に記載の薄膜トランジスタの製造方法。
- 前記ベース基板の上にゲート電極を形成し、
前記ベース基板と前記ゲート電極の上方を覆うように前記ゲート絶縁層を形成し、
前記ゲート絶縁層の前記ゲート電極に対応する上方に活性層を形成し、
前記活性層の上方に前記ボトムエッチングストップ層を形成し、
前記ボトムエッチングストップ層の上方に前記トップエッチングストップ層を形成し、
前記トップエッチングストップ層の上方に前記ソース・トレイン電極を形成し、
前記ゲート絶縁層、前記ソース・トレイン電極及び前記トップエッチングストップ層の上方を覆うように前記保護層を形成し、
前記ソース・トレイン電極と前記保護層の上方に前記画素電極を形成する、
ことを特徴とする請求項10に記載の薄膜トランジスタの製造方法。 - 前記ボトムエッチングストップ層は200〜300℃、300〜800sccmのシランガス流量で蒸着され、前記トップエッチングストップ層は240〜340℃、600〜1200sccmのシランガス流量で蒸着される、ことを特徴とする請求項10又は11に記載の薄膜トランジスタの製造方法。
- 蒸着された前記ボトムエッチングストップ層の厚さは200〜1000オングストロームであり、蒸着された前記トップエッチングストップ層の厚さは1000〜1500オングストロームである、ことを特徴とする請求項10から12の何れか一項に記載された薄膜トランジスタの製造方法。
- インジウム・ガリウム・亜鉛酸化物半導体或はインジウム・亜鉛酸化物半導体によって活性層を製造する、ことを特徴とする請求項10から13の何れか一項に記載された薄膜トランジスタの製造方法。
- 前記活性層がマグネトロンスパッタリング方式によって蒸着される、ことを特徴とする請求項10から14の何れか一項に記載された薄膜トランジスタの製造方法。
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EP2747141A1 (en) | 2014-06-25 |
KR101674347B1 (ko) | 2016-11-22 |
CN103887343B (zh) | 2017-06-09 |
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EP2747141B1 (en) | 2018-03-07 |
US20140175430A1 (en) | 2014-06-26 |
JP6321356B2 (ja) | 2018-05-09 |
US20170287950A1 (en) | 2017-10-05 |
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