JP5301971B2 - 薄膜トランジスタ、その製造方法、及びこれを含む有機電界発光表示装置 - Google Patents
薄膜トランジスタ、その製造方法、及びこれを含む有機電界発光表示装置 Download PDFInfo
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- 239000010409 thin film Substances 0.000 title claims description 61
- 238000004519 manufacturing process Methods 0.000 title claims description 31
- 239000010410 layer Substances 0.000 claims description 147
- 239000010408 film Substances 0.000 claims description 101
- 239000004065 semiconductor Substances 0.000 claims description 89
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 29
- 239000012535 impurity Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 24
- 239000011229 interlayer Substances 0.000 claims description 17
- 238000002425 crystallisation Methods 0.000 claims description 16
- 230000008025 crystallization Effects 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 230000001939 inductive effect Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000000059 patterning Methods 0.000 claims description 5
- 238000000151 deposition Methods 0.000 claims 1
- 238000005247 gettering Methods 0.000 description 5
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- 229920002120 photoresistant polymer Polymers 0.000 description 5
- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- UBSJOWMHLJZVDJ-UHFFFAOYSA-N aluminum neodymium Chemical compound [Al].[Nd] UBSJOWMHLJZVDJ-UHFFFAOYSA-N 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910021417 amorphous silicon Inorganic materials 0.000 description 2
- UMIVXZPTRXBADB-UHFFFAOYSA-N benzocyclobutene Chemical class C1=CC=C2CCC2=C1 UMIVXZPTRXBADB-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000007772 electrode material Substances 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
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 238000004151 rapid thermal annealing Methods 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
- 239000010936 titanium Substances 0.000 description 2
- 229920001621 AMOLED Polymers 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000007715 excimer laser crystallization Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- MGRWKWACZDFZJT-UHFFFAOYSA-N molybdenum tungsten Chemical compound [Mo].[W] MGRWKWACZDFZJT-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78606—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device
- H01L29/78612—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device for preventing the kink- or the snapback effect, e.g. discharging the minority carriers of the channel region for preventing bipolar effect
- H01L29/78615—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device for preventing the kink- or the snapback effect, e.g. discharging the minority carriers of the channel region for preventing bipolar effect with a body contact
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66742—Thin film unipolar transistors
- H01L29/6675—Amorphous silicon or polysilicon transistors
- H01L29/66757—Lateral single gate single channel transistors with non-inverted structure, i.e. the channel layer is formed before the gate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78606—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device
- H01L29/78618—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device characterised by the drain or the source properties, e.g. the doping structure, the composition, the sectional shape or the contact structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1259—Multistep manufacturing methods
- H01L27/127—Multistep manufacturing methods with a particular formation, treatment or patterning of the active layer specially adapted to the circuit arrangement
- H01L27/1274—Multistep manufacturing methods with a particular formation, treatment or patterning of the active layer specially adapted to the circuit arrangement using crystallisation of amorphous semiconductor or recrystallisation of crystalline semiconductor
- H01L27/1277—Multistep manufacturing methods with a particular formation, treatment or patterning of the active layer specially adapted to the circuit arrangement using crystallisation of amorphous semiconductor or recrystallisation of crystalline semiconductor using a crystallisation promoting species, e.g. local introduction of Ni catalyst
Description
106 エッジ領域
110、608 ボディーコンタクト領域
109、607 チャネル領域
107、108、605、606 ソース/ドレイン領域
105、604 ゲート絶縁膜
111、609 ゲート電極
112、610 層間絶縁膜
114、115、612、613 ソース/ドレイン電極
118 第1電極
120 有機膜層
121 第2電極
Claims (15)
- 基板と;
前記基板上に位置し、チャネル領域、ソース/ドレイン領域及びボディーコンタクト領域を含む半導体層と;
前記半導体層における前記チャネル領域の上面を覆い、前記ボディーコンタクト領域を露出させるゲート絶縁膜と;
前記ゲート絶縁膜上に位置し、前記ゲート絶縁膜により露出した前記ボディーコンタクト領域と接するゲート電極と;
前記ゲート電極上に位置する層間絶縁膜;及び
前記層間絶縁膜上に位置し、前記ソース/ドレイン領域と電気的に連結されるソース/ドレイン電極を含み、
前記ボディーコンタクト領域は前記半導体層のエッジ領域内において前記チャネル領域と連結して形成され、かつ前記ゲート絶縁膜により露出した露出面を有し、
前記ボディーコンタクト領域には前記ソース/ドレイン領域と反対型の不純物であるN型不純物を含み、
前記半導体層は結晶化誘導金属を利用して結晶化した多結晶シリコン層で形成され、
前記ゲート絶縁膜は前記ボディーコンタクト領域以外の前記半導体層のエッジ領域の一部または全部をさらに露出させ、
前記ゲート絶縁膜により露出した前記半導体層のエッジ領域は前記ソース/ドレイン領域と反対型の不純物を含み、
前記露出面は、前記チャネル領域の前記上面に連なる露出端面と、前記露出端面に対して起立する露出側面と、を有し、
前記ゲート電極は、前記露出端面及び前記露出側面において、前記ボディーコンタクト領域と接していることを特徴とする薄膜トランジスタ。 - 前記チャネル領域と対応する領域に形成された前記ゲート絶縁膜の幅は前記チャネル領域の幅及び前記ボディーコンタクト領域の幅の合計より小さ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。
- 前記ボディーコンタクト領域の一方向の幅は0より大きく0.1μm以下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。
- 前記ゲート絶縁膜によって露出されたエッジ領域は前記チャネル領域の長さと同じであるか大き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。
- 請求項1に記載の薄膜トランジスタの製造方法であって、
基板を提供して、
前記基板上に位置する半導体層を形成して、
前記半導体層上に前記半導体層のエッジ領域の一部または全部を露出させるゲート絶縁膜を形成して、
前記ゲート絶縁膜上に前記ゲート絶縁膜により露出した前記半導体層のエッジ領域と接するようにゲート電極を形成して、
前記ゲート電極上に層間絶縁膜を形成して、
前記層間絶縁膜上に前記半導体層のソース/ドレイン領域と電気的に連結されるソース/ドレイン電極を形成することを含むことを特徴とする薄膜トランジスタの製造方法。 - 前記ゲート絶縁膜により露出した前記半導体層のエッジ領域は前記半導体層のチャネル領域と連結したエッジ領域を含むことを特徴とする請求項5に記載の薄膜トランジスタの製造方法。
- 請求項6において、
前記ゲート絶縁膜により露出されて、前記半導体層のチャネル領域と連結したエッジ領域の一方向の幅が0より大きく0.1μm以下になるように前記ゲート絶縁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。 - 前記ゲート絶縁膜をマスクとして、前記ゲート絶縁膜により露出した前記半導体層のエッジ領域に前記半導体層のソース/ドレイン領域と反対型の不純物を注入する工程をさらに含む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。
- 前記半導体層及び前記ゲート絶縁膜を形成することは
多結晶シリコン層を形成して、
前記多結晶シリコン層上に絶縁膜を蒸着して、
前記多結晶シリコン層及び前記絶縁膜を一度のパターニング工程で前記半導体層及び前記ゲート絶縁膜を形成することを特徴とする請求項5に記載の薄膜トランジスタの製造方法。 - 前記多結晶シリコン層及び前記絶縁膜を一度のパターニング工程ですることは
前記絶縁膜のCDバイアスを前記多結晶シリコン層のCDバイアスより大きく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。 - 前記半導体層を結晶化誘導金属を利用して結晶化した多結晶シリコン層に形成して、
前記ゲート絶縁膜をマスクとして前記ゲート絶縁膜により露出した前記半導体層のエッジ領域にN型不純物を注入して、
前記基板を熱処理して前記半導体層内に残存する前記結晶化誘導金属を前記N型不純物が注入された領域にゲッタリングすることを特徴とする請求項5に記載の薄膜トランジスタの製造方法。 - 前記熱処理は450℃ないし900℃の温度で30秒ないし10時間の間行うことを特徴とする請求項11に記載の薄膜トランジスタの製造方法。
- 基板と;
前記基板上に位置し、チャネル領域、ソース/ドレイン領域及びボディーコンタクト領域を含む半導体層と;
前記半導体層における前記チャネル領域の上面を覆い、前記ボディーコンタクト領域を露出させるゲート絶縁膜と;
前記ゲート絶縁膜上に位置し、前記ゲート絶縁膜により露出した前記ボディーコンタクト領域と接するゲート電極と;
前記ゲート電極上に位置する層間絶縁膜と;
前記層間絶縁膜上に位置し、前記ソース/ドレイン領域と電気的に連結されるソース/ドレイン電極と;
前記ソース/ドレイン電極と電気的に連結された第1電極と;
前記第1電極上に位置し、発光層を含む有機膜層;及び
前記有機膜層上に位置する第2電極を含み、
前記ボディーコンタクト領域は前記半導体層のエッジ領域内において前記チャネル領域と連結して形成され、かつ前記ゲート絶縁膜により露出した露出面を有し、
前記ボディーコンタクト領域には前記ソース/ドレイン領域と反対型の不純物であるN型不純物を含み、
前記半導体層は結晶化誘導金属を利用して結晶化した多結晶シリコン層で形成され、
前記ゲート絶縁膜は前記ボディーコンタクト領域以外の前記半導体層のエッジ領域の一部または全部をさらに露出させ、
前記ゲート絶縁膜により露出した前記半導体層のエッジ領域は前記ソース/ドレイン領域と反対型の不純物を含み、
前記露出面は、前記チャネル領域の前記上面に連なる露出端面と、前記露出端面に対して起立する露出側面と、を有し、
前記ゲート電極は、前記露出端面及び前記露出側面において、前記ボディーコンタクト領域と接していることを特徴とする有機電界発光表示装置。 - 前記チャネル領域と対応する領域に形成された前記ゲート絶縁膜の幅は前記チャネル領域の幅及び前記ボディーコンタクト領域の幅の合計より小さいことを特徴とする請求項13に記載の有機電界発光表示装置。
- 前記ボディーコンタクト領域の一方向の幅は0より大きく0.1μm以下であることを特徴とする請求項13に記載の有機電界発光表示装置。
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US8436360B2 (en) | 2013-05-07 |
CN101546782B (zh) | 2011-01-12 |
US20090242895A1 (en) | 2009-10-01 |
KR100982310B1 (ko) | 2010-09-15 |
US8101952B2 (en) | 2012-01-24 |
EP2107613A1 (en) | 2009-10-07 |
JP2009239252A (ja) | 2009-10-15 |
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US20120088340A1 (en) | 2012-04-12 |
EP2107613B1 (en) | 2011-05-18 |
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