JP6440228B2 - 薄膜トランジスタ基板の製造方法 - Google Patents
薄膜トランジスタ基板の製造方法 Download PDFInfo
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- JP6440228B2 JP6440228B2 JP2017525605A JP2017525605A JP6440228B2 JP 6440228 B2 JP6440228 B2 JP 6440228B2 JP 2017525605 A JP2017525605 A JP 2017525605A JP 2017525605 A JP2017525605 A JP 2017525605A JP 6440228 B2 JP6440228 B2 JP 6440228B2
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- 239000010409 thin film Substances 0.000 title claims description 141
- 238000000034 method Methods 0.000 title claims description 86
- 238000004519 manufacturing process Methods 0.000 title claims description 66
- 239000000758 substrate Substances 0.000 title claims description 62
- 239000004065 semiconductor Substances 0.000 claims description 389
- 239000010410 layer Substances 0.000 claims description 363
- 239000011241 protective layer Substances 0.000 claims description 298
- 239000003990 capacitor Substances 0.000 claims description 64
- 238000003860 storage Methods 0.000 claims description 63
- 238000000059 patterning Methods 0.000 claims description 45
- 238000005530 etching Methods 0.000 claims description 42
- 229910052751 metal Inorganic materials 0.000 claims description 41
- 239000002184 metal Substances 0.000 claims description 41
- 239000011248 coating agent Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 15
- 238000000151 deposition Methods 0.000 claims description 11
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 8
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 8
- 229910052733 gallium Inorganic materials 0.000 claims description 8
- 229910052738 indium Inorganic materials 0.000 claims description 8
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 239000011701 zinc Substances 0.000 claims description 8
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- 238000001465 metallisation Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 230000001681 protective effect 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
- 229910021417 amorphous silicon Inorganic materials 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- QLNWXBAGRTUKKI-UHFFFAOYSA-N metacetamol Chemical compound CC(=O)NC1=CC=CC(O)=C1 QLNWXBAGRTUKKI-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000011257 shell material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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Description
前記製造方法は、以下の手順からなる。
基板上に第1金属層と絶縁層を順番に堆積するとともにパターン化することによって、薄膜トランジスタのゲート電極とゲート電極絶縁層をそれぞれ形成させる。前記ゲート電極絶縁層上に半導体層と第1保護層を順番に堆積させ、前記第1保護層は、エッチング停止層であり、その材料は窒化シリコンである。前記第1保護層をパターン化することによって前記第1保護層の一部を除去するとともに、前記薄膜トランジスタの半導体チャネルを形成するのに用いられる半導体層上に位置する第1保護層を少なくとも残す。そのうち、前記半導体チャネルを形成するのに用いられる半導体層を被覆する第1保護層における、前記薄膜トランジスタのソース電極およびドレイン電極と接触する半導体チャネルを形成するに用いられる半導体層を被覆する第1保護層の厚みは、その他の半導体層を被覆する第1保護層の厚みよりも小さくされる。フォトマスクであるパターン化された後の前記第1保護層を利用して、前記半導体層をパターン化することによって、前記第1保護層に被覆されていない半導体層を除去する。前記半導体チャネルを形成するのに用いられる半導体層を被覆する前記第1保護層にエッチングを行うことによって、前記薄膜トランジスタのソース電極およびドレイン電極と接触する半導体チャネルを形成するのに用いられる半導体層を被覆する前記第1保護層を除去し、さらに前記薄膜トランジスタのソース電極およびドレイン電極と接触する半導体チャネルを形成するのに用いられる半導体層を露出させる。フォトマスクであるエッチング後の第1保護層を利用して、前記薄膜トランジスタのソース電極およびドレイン電極と接触する半導体チャネルを形成するのに用いられる露出された前記半導体層をメタライズし、さらに前記ゲート電極絶縁層上に前記薄膜トランジスタの半導体チャネルを形成させる。前記半導体チャネル上に第2金属層を堆積するとともにパターン化することによって、前記薄膜トランジスタのソース電極とドレイン電極を形成させ、前記ソース電極と前記ドレイン電極は、それぞれ前記半導体チャネルと接触する。
第3フォトマスク73は、塗布ユニットがゲート電極絶縁層に半導体層と第1保護層を順番に塗布した後、第1保護層をパターン化することによって第1保護層の一部を除去するとともに、少なくとも薄膜トランジスタの半導体チャネルを形成するのに用いられる半導体層上に位置する第1保護層を残すことで、フォトマスクである残された第1保護層を利用して半導体層をパターン化し、第1保護層に被覆されていない半導体層を除去し、さらにゲート電極絶縁層上に薄膜トランジスタの半導体チャネルを形成するのに用いられる。第4フォトマスク74は、塗布ユニットが、半導体チャネルに第2金属層を塗布した後、第2金属層をパターン化することによって、薄膜トランジスタのソース電極とドレイン電極を形成するのに用いられ、ソース電極とドレイン電極は、それぞれ半導体チャネルと接触する。
12 絶縁層
13 半導体層
14 第1保護層
15 第2金属層
16 第2保護層
17 画素電極層
31、31a、31b ゲート電極
32 ゲート電極絶縁層
32a ビアホール
33 半導体層
34 第1保護層
33a、 33b 半導体チャネル
34a、34b 第1保護層
34b 第1保護層
35a、35a'ドレイン電極
35b、35b' ソース電極
Q1、Q2 薄膜トランジスタ
70、80 90 塗布ユニット
71 第1フォトマスク
72 第2フォトマスク
73、83、93 第3フォトマスク
74、84、94 第4フォトマスク
85、95 エッチングシステム
86、96 メタライズシステム
97 第5フォトマスク
Claims (4)
- OLED表示パネルに使用される薄膜トランジスタ基板の製造方法であって、
前記製造方法は、
基板上に第1金属層と絶縁層を順番に堆積するとともにパターン化することによって、薄膜トランジスタのゲート電極とゲート電極絶縁層をそれぞれ形成させる手順と、
前記ゲート電極絶縁層上に半導体層と第1保護層を順番に堆積する手順と、
前記第1保護層をパターン化することによって前記第1保護層の一部を除去するとともに、前記薄膜トランジスタの半導体チャネルを形成するのに用いられる半導体層上に位置する第1保護層を少なくとも残し、そのうち、前記半導体チャネルを形成するのに用いられる半導体層を被覆する第1保護層における、前記薄膜トランジスタのソース電極およびドレイン電極と接触する半導体チャネルを形成するのに用いられる半導体層を被覆する第1保護層の厚みを、その他の半導体層を被覆する第1保護層の厚みよりも小さくする手順と、
フォトマスクであるパターン化された後の前記第1保護層を利用して、前記半導体層をパターン化することによって、前記第1保護層に被覆されていない半導体層を除去する手順と、
前記半導体チャネルを形成するのに用いられる半導体層を被覆する前記第1保護層にエッチングを行うことによって、前記薄膜トランジスタのソース電極およびドレイン電極と接触する半導体チャネルを形成するのに用いられる半導体層を被覆する前記第1保護層を除去し、さらに前記薄膜トランジスタのソース電極およびドレイン電極と接触する半導体チャネルを形成するのに用いられる半導体層を露出させる手順と、
フォトマスクであるエッチング後の第1保護層を利用して、前記薄膜トランジスタのソース電極およびドレイン電極と接触する半導体チャネルを形成するのに用いられる露出された前記半導体層をメタライズし、さらに前記ゲート電極絶縁層上に前記薄膜トランジスタの半導体チャネルを形成させる手順と、
前記半導体チャネル上に第2金属層を堆積するとともにパターン化することによって、前記薄膜トランジスタの前記ソース電極と前記ドレイン電極を形成させ、前記ソース電極と前記ドレイン電極を、それぞれ前記半導体チャネルと接触させる手順と、
からなり、
前記第1保護層は、エッチング停止層であり、その材料は窒化シリコンである
ことを特徴とする薄膜トランジスタ基板の製造方法。 - 請求項1に記載の薄膜トランジスタ基板の製造方法において、
前記半導体層の材料は、インジウム、ガリウム及び亜鉛を含む酸化物であり、
前記第1保護層をパターン化する前記手順は、
前記第1保護層をパターン化することによって、保持容量の第1電極を形成するのに用いられる半導体層上に位置する第1保護層を残す手順、からなり、
さらに、保持容量の第1電極を形成するのに用いられる半導体層上に位置する第1保護層の厚みは、前記その他の半導体層を被覆する第1保護層の厚みよりも小さく、
前記半導体チャネルを形成するのに用いられる半導体層を被覆する前記第1保護層にエッチングを行う前記手順は、
保持容量の第1電極を形成するのに用いられる半導体層上に位置する前記第1保護層を除去することによって、保持容量の第1電極を形成するのに用いられる前記半導体層を露出させる手順からなり、
フォトマスクであるエッチング後の第1保護層を利用して、前記薄膜トランジスタのソース電極およびドレイン電極と接触する半導体チャネルを形成するのに用いられる露出された前記半導体層をメタライズする前記手順は、
フォトマスクであるエッチング後の第1保護層を利用して、保持容量の第1電極を形成するのに用いられる露出された前記半導体層をメタライズすることによって、前記保持容量の第1電極を形成させる手順からなる
ことを特徴とする薄膜トランジスタ基板の製造方法。 - 請求項2に記載の薄膜トランジスタ基板の製造方法において、
保持容量の第1電極を形成するのに用いられる前記半導体層上に位置する前記第1保護層の厚みと、前記薄膜トランジスタのソース電極およびドレイン電極と接触する半導体チャネルを形成するのに用いられる半導体層を被覆する第1保護層の厚みは同じであるとともに、その他の半導体層を被覆する第1保護層の厚みの2分の1である
ことを特徴とする薄膜トランジスタ基板の製造方法。 - 請求項2に記載の薄膜トランジスタ基板の製造方法において、
前記半導体チャネル上に第2金属層を堆積するとともにパターン化することによって、前記薄膜トランジスタの前記ソース電極と前記ドレイン電極を形成させる前記手順の後、
前記ソース電極と前記ドレイン電極が形成される基板上に第2保護層を形成させる手順と、
前記ドレイン電極上の第2保護層にビアホールを設ける手順と、
前記第2保護層上に前記保持容量の第2電極である透明導電層を形成させるとともに、前記透明導電層を、前記ビアホールによって前記ドレイン電極と接続させる手順と、を行う
ことを特徴とする薄膜トランジスタ基板の製造方法。
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CN102881712B (zh) * | 2012-09-28 | 2015-02-25 | 京东方科技集团股份有限公司 | 一种阵列基板及其制造方法、oled显示装置 |
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CN103715226A (zh) * | 2013-12-12 | 2014-04-09 | 京东方科技集团股份有限公司 | Oled阵列基板及其制备方法、显示面板及显示装置 |
CN103928343B (zh) * | 2014-04-23 | 2017-06-20 | 深圳市华星光电技术有限公司 | 薄膜晶体管及有机发光二极管显示器制备方法 |
CN104022079A (zh) * | 2014-06-19 | 2014-09-03 | 深圳市华星光电技术有限公司 | 薄膜晶体管基板的制造方法 |
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