JP5700724B2 - 薄膜トランジスタの製造方法及びそれを含む有機電界発光表示装置の製造方法 - Google Patents
薄膜トランジスタの製造方法及びそれを含む有機電界発光表示装置の製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 26
- 239000010409 thin film Substances 0.000 title claims description 23
- 239000010408 film Substances 0.000 claims description 75
- 239000000758 substrate Substances 0.000 claims description 35
- 229910052751 metal Inorganic materials 0.000 claims description 33
- 239000002184 metal Substances 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 27
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 26
- 239000012535 impurity Substances 0.000 claims description 23
- 239000004065 semiconductor Substances 0.000 claims description 20
- 230000005684 electric field Effects 0.000 claims description 18
- 238000002425 crystallisation Methods 0.000 claims description 13
- 230000008025 crystallization Effects 0.000 claims description 13
- UBSJOWMHLJZVDJ-UHFFFAOYSA-N aluminum neodymium Chemical compound [Al].[Nd] UBSJOWMHLJZVDJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000011651 chromium Substances 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 10
- 238000000059 patterning Methods 0.000 claims description 10
- 239000010936 titanium Substances 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 6
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 6
- 229910001182 Mo alloy Inorganic materials 0.000 claims description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical group [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 239000011733 molybdenum Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- MGRWKWACZDFZJT-UHFFFAOYSA-N molybdenum tungsten Chemical compound [Mo].[W] MGRWKWACZDFZJT-UHFFFAOYSA-N 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 239000010937 tungsten Substances 0.000 claims description 5
- 238000005401 electroluminescence Methods 0.000 claims 2
- 239000010410 layer Substances 0.000 description 55
- 238000010438 heat treatment Methods 0.000 description 22
- 239000000463 material Substances 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000004151 rapid thermal annealing Methods 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- UMIVXZPTRXBADB-UHFFFAOYSA-N benzocyclobutene Chemical compound C1=CC=C2CCC2=C1 UMIVXZPTRXBADB-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000005224 laser annealing Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 238000013532 laser treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
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Description
図1A〜図1Fは、本発明の一実施形態に係る薄膜トランジスタの製造方法を示す図である。
110 バッファ層
120 半導体層
120’ 非晶質シリコン層パターン
120a ソース領域
120b ドレイン領域
120c チャンネル領域
130A ソース/ドレイン電極用金属膜
Claims (10)
- 基板を提供する工程と、
前記基板上にバッファ層を形成する工程と、
前記バッファ層上に非晶質シリコン層パターンを形成する工程と、
前記基板全面にソース/ドレイン電極用金属膜を形成する工程と、
前記ソース/ドレイン電極用金属膜に電界を印加して、前記非晶質シリコン層パターンを結晶化して半導体層を形成する工程と、
前記ソース/ドレイン電極用金属膜をパターニングして、前記半導体層と接続するソース/ドレイン電極を形成する工程と、
前記基板全面にゲート絶縁膜を形成する工程と、
前記ゲート絶縁膜上に位置して、前記半導体層に重複するゲート電極を形成する工程と、
前記基板全面に保護膜を形成する工程と、
を含み、
前記非晶質シリコン層パターンを形成した後、前記ソース/ドレイン電極に重複する前記非晶質シリコン層パターンのソース/ドレイン領域に不純物ドーピングを実施し、前記非晶質シリコン層パターンで前記ソース/ドレイン領域と同一層に位置して不純物ドーピングが実施されない領域をチャンネル領域とし、
前記不純物ドーピングは、前記ソース/ドレイン電極をパターニングするマスクと等しいマスクを用いて実施されることを特徴とする、薄膜トランジスタの製造方法。 - 前記不純物は、
N型またはP型不純物であることを特徴とする、請求項1に記載の薄膜トランジスタの製造方法。 - 前記ソース/ドレイン電極用金属膜は、
基板全面に50〜300nmの厚さで形成されることを特徴とする、請求項1に記載の薄膜トランジスタの製造方法。 - 前記結晶化は、
前記ソース/ドレイン電極用金属膜に100〜10000V/cmの電界を印加して進行することを特徴とする、請求項1に記載の薄膜トランジスタの製造方法。 - 前記ソース/ドレイン電極用金属膜は、
モリブデン(Mo)、クロム(Cr)、タングステン(W)、モリブデンタングステン(MoW)、アルミニウム(Al)、アルミニウム−ネオジム(Al−Nd)、チタン(Ti)、窒化チタン(TiN)、銅(Cu)、モリブデン合金(Moalloy)、アルミニウム合金(Alalloy)、及び銅合金(Cualloy)の中から選択されるいずれか1つを使って形成されることを特徴とする、請求項1に記載の薄膜トランジスタの製造方法。 - 基板を提供する工程と、
前記基板上にバッファ層を形成する工程と、
前記バッファ層上に非晶質シリコン層パターンを形成する工程と、
前記基板全面にソース/ドレイン電極用金属膜を形成する工程と、
前記ソース/ドレイン電極用金属膜に電界を印加して、前記非晶質シリコン層パターンを結晶化して半導体層を形成する工程と、
前記ソース/ドレイン電極用金属膜をパターニングして、前記半導体層と接続するソース/ドレイン電極を形成する工程と、
前記基板全面にゲート絶縁膜を形成する工程と、
前記ゲート絶縁膜上に位置して、前記半導体層に重複するゲート電極を形成する工程と、
前記基板全面に保護膜を形成する工程と、
前記保護膜上に平坦化膜を形成する工程と、
前記平坦化膜上に前記ソース/ドレイン電極と電気的に接続する第1電極、有機膜及び第2電極を形成する工程と、
を含み、
前記非晶質シリコン層パターンを形成した後、前記ソース/ドレイン電極に重複する前記非晶質シリコン層パターンのソース/ドレイン領域に不純物ドーピングを実施し、前記非晶質シリコン層パターンで前記ソース/ドレイン領域と同一層に位置して不純物ドーピングが実施されない領域をチャンネル領域とし、
前記不純物ドーピングは、前記ソース/ドレイン電極をパターニングするマスクと等しいマスクを用いて実施されることを特徴とする、有機電界発光表示装置の製造方法。 - 前記不純物は、
N型またはP型不純物であることを特徴とする、請求項6に記載の有機電界発光表示装置の製造方法。 - 前記ソース/ドレイン電極用金属膜は、
基板全面に50〜300nmの厚さで形成されることを特徴とする、請求項6に記載の有機電界発光表示装置の製造方法。 - 前記結晶化は、
前記ソース/ドレイン電極用金属膜に100〜10000V/cmの電界を印加して進行することを特徴とする、請求項6に記載の有機電界発光表示装置の製造方法。 - 前記ソース/ドレイン電極用金属膜は、
モリブデン(Mo)、クロム(Cr)、タングステン(W)、モリブデンタングステン(MoW)、アルミニウム(Al)、アルミニウム−ネオジム(Al−Nd)、チタン(Ti)、窒化チタン(TiN)、銅(Cu)、モリブデン合金(Moalloy)、アルミニウム合金(Alalloy)、及び銅合金(Cualloy)の中から選択されるいずれか1つを使って形成されることを特徴とする、請求項6に記載の有機電界発光表示装置の製造方法。
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