JP5542269B2 - 発光装置 - Google Patents
発光装置 Download PDFInfo
- Publication number
- JP5542269B2 JP5542269B2 JP2008168648A JP2008168648A JP5542269B2 JP 5542269 B2 JP5542269 B2 JP 5542269B2 JP 2008168648 A JP2008168648 A JP 2008168648A JP 2008168648 A JP2008168648 A JP 2008168648A JP 5542269 B2 JP5542269 B2 JP 5542269B2
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- Prior art keywords
- semiconductor film
- film
- electrode
- light
- thin film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a 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
- H01L29/78696—Thin film transistors, i.e. transistors with a channel being at least partly a thin film characterised by the structure of the channel, e.g. multichannel, transverse or longitudinal shape, length or width, doping structure, or the overlap or alignment between the channel and the gate, the source or the drain, or the contacting structure of the channel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/04—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their crystalline structure, e.g. polycrystalline, cubic or particular orientation of crystalline planes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/45—Ohmic electrodes
- H01L29/456—Ohmic electrodes on silicon
- H01L29/458—Ohmic electrodes on silicon for thin film silicon, e.g. source or drain electrode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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Description
本実施の形態では、発光装置に用いられる薄膜トランジスタの作製工程について、図1乃至図8を用いて説明する。図1乃至図3、図5乃至図7は、薄膜トランジスタの作製工程を示す断面図であり、図4、及び図8は、一画素における薄膜トランジスタ及び画素電極の接続領域の上面図である。
次に、発光装置の作製工程について、図13及び図14を用いて説明する。発光装置としては、ここではエレクトロルミネッセンスを利用する発光素子を用いて示す。エレクトロルミネッセンスを利用する発光素子は、発光材料が有機化合物であるか、無機化合物であるかによって区別され、一般的に、前者は有機EL素子、後者は無機EL素子と呼ばれている。また、ここでは、薄膜トランジスタの作製工程として図5乃至図8を用いるが、適宜図1乃至図3を用いることができる。
次に、本発明の発光装置の一形態である発光パネルの構成について、以下に示す。
本発明により得られる発光装置等は、アクティブマトリクス型ELモジュールに用いることができる。即ち、それらを表示部に組み込んだ電子機器全てに本発明を実施できる。
51 ゲート電極
52a、52b ゲート絶縁膜
53 微結晶半導体膜
54 バッファ層
55 一導電型を付与する不純物が添加された半導体膜
56 マスク
61 微結晶半導体膜
62 バッファ層
63 一導電型を付与する不純物が添加された半導体膜
65a〜65c 導電膜
66 マスク
71a〜71c 導電膜
72 ソース領域及びドレイン領域
73 バッファ層
74 チャネルエッチ型の薄膜トランジスタ
75a〜75c ソース電極及びドレイン電極
76 絶縁膜
77 画素電極
Claims (2)
- ゲート電極と、
前記ゲート電極上のゲート絶縁膜と、
前記ゲート絶縁膜上の第1の半導体膜と、
前記第1の半導体膜上の第2の半導体膜と、
前記第2の半導体膜上の第3の半導体膜及び第4の半導体膜と、
前記第3の半導体膜上のソース電極と、
前記第4の半導体膜上のドレイン電極と、
前記ソース電極及び前記ドレイン電極上の絶縁膜と、
前記絶縁膜上の画素電極と、を有し、
前記第1の半導体膜と前記第2の半導体膜との端部は一致し、
前記第3の半導体膜の端部は、前記第1及び前記第2の半導体膜の端部よりも内側に位置し、
前記第4の半導体膜の端部は、前記第1及び前記第2の半導体膜の端部よりも内側に位置し、
前記第3の半導体膜の対向する一対の端部は、前記第1の半導体膜の対向する一対の端部よりも内側に位置し、
前記第4の半導体膜の対向する一対の端部は、前記第1の半導体膜の対向する一対の端部よりも内側に位置し、
前記ソース電極の対向する一対の端部は、前記第3の半導体膜の対向する一対の端部よりも内側に位置し、
前記ドレイン電極は、互いに対向する第1の端部と第2の端部とを有し、
前記第4の半導体膜は、互いに対向する第1の端部と第2の端部とを有し、
前記ドレイン電極の前記第1の端部は、前記第4の半導体膜の前記第1の端部よりも内側に位置し、
前記ドレイン電極は、前記第4の半導体膜の前記第2の端部、前記第2の半導体膜の側面、及び第1の半導体膜の側面を覆い、
前記第1の半導体膜は、0.5nm〜20nmの結晶粒を有し、
前記第2の半導体膜の抵抗率は、前記第1の半導体層の抵抗率よりも高く、
前記第3の半導体膜は、n型の半導体膜であり、
前記第4の半導体膜は、n型の半導体膜であることを特徴とする発光装置。 - ゲート電極と、
前記ゲート電極上のゲート絶縁膜と、
前記ゲート絶縁膜上の第1の半導体膜と、
前記第1の半導体膜上の第2の半導体膜と、
前記第2の半導体膜上の第3の半導体膜及び第4の半導体膜と、
前記第3の半導体膜上のソース電極と、
前記第4の半導体膜上のドレイン電極と、
前記ソース電極及び前記ドレイン電極上の絶縁膜と、
前記絶縁膜上の画素電極と、
前記絶縁膜上の配線と、を有し、
前記第1の半導体膜と前記第2の半導体膜との端部は一致し、
前記第3の半導体膜の端部は、前記第1及び前記第2の半導体膜の端部よりも内側に位置し、
前記第4の半導体膜の端部は、前記第1及び前記第2の半導体膜の端部よりも内側に位置し、
前記第3の半導体膜の対向する一対の端部は、前記第1の半導体膜の対向する一対の端部よりも内側に位置し、
前記第4の半導体膜の対向する一対の端部は、前記第1の半導体膜の対向する一対の端部よりも内側に位置し、
前記ソース電極の対向する一対の端部は、前記第3の半導体膜の対向する一対の端部よりも内側に位置し、
前記ドレイン電極は、互いに対向する第1の端部と第2の端部とを有し、
前記第4の半導体膜は、互いに対向する第1の端部と第2の端部とを有し、
前記ドレイン電極の前記第1の端部は、前記第4の半導体膜の前記第1の端部よりも内側に位置し、
前記ドレイン電極は、前記第4の半導体膜の前記第2の端部、前記第2の半導体膜の側面、及び前記第1の半導体膜の側面を覆い、
前記第1の半導体膜は、0.5nm〜20nmの結晶粒を有し、
前記第2の半導体膜の抵抗率は、前記第1の半導体層の抵抗率よりも高く、
前記第3の半導体膜は、n型の半導体膜であり、
前記第4の半導体膜は、n型の半導体膜であり、
前記ソース電極は、チタン、タンタル、モリブデン、又はタングステンのいずれかを有し、
前記ドレイン電極は、チタン、タンタル、モリブデン、又はタングステンのいずれかを有し、
前記配線はアルミニウムを有し、
前記画素電極は透光性を有する導電材料を有し、
前記配線は前記ソース電極と接触し、
前記画素電極は前記ドレイン電極と接触することを特徴とする発光装置。
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2008
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- 2008-06-25 TW TW097123744A patent/TWI466299B/zh not_active IP Right Cessation
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US20090001375A1 (en) | 2009-01-01 |
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US8921858B2 (en) | 2014-12-30 |
KR20090004587A (ko) | 2009-01-12 |
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