JP5245287B2 - 半導体装置の製造方法、薄膜トランジスタ基板の製造方法および表示装置の製造方法 - Google Patents
半導体装置の製造方法、薄膜トランジスタ基板の製造方法および表示装置の製造方法 Download PDFInfo
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- 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
- H01L29/66007—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
- H01L29/66765—Lateral single gate single channel transistors with inverted structure, i.e. the channel layer is formed after the gate
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
- H01L29/4908—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET for thin film semiconductor, e.g. gate of TFT
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- H01L27/1259—Multistep manufacturing methods
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Description
Id=(1/2)・μ・(W/L)・Cox(Vg−Vth)2…式(1)
式(1)中において、μはチャネルとなる反転層におけるキャリア移動度、Wはトランジスタのゲート幅、Lはトランジスタのゲート長、Coxはゲート絶縁膜の容量、Vgはゲート電圧、Vthは閾値電圧である。
図1および図2は、本発明の半導体装置の製造方法を、薄膜トランジスタの製造に適用した場合の断面工程図を示す。本実施形態においては、これらの図に基づいて薄膜トランジスタを備えた薄膜トランジスタ基板を製造する手順を説明する。
図3には、上述のようにして作製された薄膜トランジスタ基板を用いた表示装置5の一例として、有機EL表示装置の一構成例を説明するための概略のパネル構成図である。
以上説明した本発明に係る表示装置は、図6〜図10に示す様々な電子機器、例えば、デジタルカメラ、ノート型パーソナルコンピュータ、携帯電話等の携帯端末装置、ビデオカメラなど、電子機器に入力された映像信号、若しくは、電子機器内で生成した映像信号を、画像若しくは映像として表示するあらゆる分野の電子機器の表示装置に適用することが可能である。以下に、本発明が適用される電子機器の一例について説明する。
本発明の製造方法を適用し、上記薄膜トランジスタTrと同一工程で作製される同一の層構造の容量素子を半導体装置として作製した。図11(A)は作製した容量素子Csの一部を切り欠いた平面図であり、図11(B)は図11(A)のA−A’断面図である。尚、図1および図2を用いて説明したと同一層には同一の符号を付した。
上述した実施例の手順において、レーザー光による結晶化をしない他は、同じ手順で容量素子を作製し、同様の評価を行った。
このようにして作製した実施例および比較例の容量素子Csにおいて、ソース電極/ドレイン電極と同一層の上部電極29と、ゲート電極と同一層の下部電極11との間の容量、およびリーク電流を測定した。
Claims (7)
- 基板上のゲート電極を覆う状態で、金属酸化物を用いた絶縁膜と半導体薄膜とがこの順に成膜された積層体を形成する工程と、
前記積層体の上部に光吸収層を形成する工程と、
前記光吸収層で吸収される波長のエネルギー線を当該光吸収層に対して照射し、当該光吸収層で発生させた熱により前記絶縁膜および前記半導体薄膜を同時に結晶化させる工程とを行う
半導体装置の製造方法。 - 前記エネルギー線の照射は、前記ゲート電極上に対して部分的に行われる
請求項1記載の半導体装置の製造方法。 - 前記光吸収層を、金属またはシリサイドを用いて形成する
請求項1または請求項2に記載の半導体装置の製造方法。 - 基板上のゲート電極を覆う状態で、金属酸化物を用いたゲート絶縁膜と半導体薄膜とがこの順に成膜された積層体を形成する工程と、
前記積層体の上部に光吸収層を形成する工程と、
前記光吸収層で吸収される波長のエネルギー線を当該光吸収層に対して照射し、当該光吸収層で発生させた熱により前記ゲート絶縁膜および前記半導体薄膜を同時に結晶化させる工程とを行う
薄膜トランジスタ基板の製造方法。 - 前記光吸収層を、金属またはシリサイドを用いて形成する
請求項4記載の薄膜トランジスタ基板の製造方法。 - 基板上に薄膜トランジスタとこれに接続された画素電極とを形成する表示装置の製造方法において、
前記薄膜トランジスタを形成する際には、
前記基板上のゲート電極を覆う状態で、金属酸化物を用いたゲート絶縁膜と半導体薄膜とがこの順に成膜された積層体を形成する工程と、
前記積層体の上部に光吸収層を形成する工程と、
前記光吸収層で吸収される波長のエネルギー線を当該光吸収層に対して照射し、当該光吸収層で発生させた熱により前記ゲート絶縁膜および前記半導体薄膜を同時に結晶化させる工程とを行う
表示装置の製造方法。 - 前記光吸収層を、金属またはシリサイドを用いて形成する
請求項6記載の表示装置の製造方法。
Priority Applications (6)
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JP2007132784A JP5245287B2 (ja) | 2007-05-18 | 2007-05-18 | 半導体装置の製造方法、薄膜トランジスタ基板の製造方法および表示装置の製造方法 |
US12/121,398 US7955916B2 (en) | 2007-05-18 | 2008-05-15 | Method for making semiconductor apparatus and semiconductor apparatus obtained by the method, method for making thin film transistor substrate and thin film transistor substrate obtained by the method, and method for making display apparatus and display apparatus obtained by the method |
CN200810097146.7A CN101308781B (zh) | 2007-05-18 | 2008-05-19 | 半导体设备、薄膜晶体管基板以及显示设备及其制备方法 |
US13/094,381 US8222647B2 (en) | 2007-05-18 | 2011-04-26 | Method for making semiconductor apparatus and semiconductor apparatus obtained by the method, method for making thin film transistor substrate and thin film transistor substrate obtained by the method, and method for making display apparatus and display apparatus obtained by the method |
US13/454,141 US8461595B2 (en) | 2007-05-18 | 2012-04-24 | Method for making semiconductor apparatus and semiconductor apparatus obtained by the method, method for making thin film transistor substrate and thin film transistor substrate obtained by the method, and method for making display apparatus and display apparatus obtained by the method |
US13/535,762 US20120267633A1 (en) | 2007-05-18 | 2012-06-28 | Method for making semiconductor apparatus and semiconductor apparatus obtained by the method, method for making thin film transistor substrate and thin film transistor substrate obtained by the method, and method for making display apparatus and display apparatus obtained by the method |
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-
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2008
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- 2008-05-19 CN CN200810097146.7A patent/CN101308781B/zh not_active Expired - Fee Related
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2011
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US20120205657A1 (en) | 2012-08-16 |
CN101308781B (zh) | 2011-09-28 |
JP2008288424A (ja) | 2008-11-27 |
US7955916B2 (en) | 2011-06-07 |
US20110198600A1 (en) | 2011-08-18 |
US20080283842A1 (en) | 2008-11-20 |
US8222647B2 (en) | 2012-07-17 |
US8461595B2 (en) | 2013-06-11 |
US20120267633A1 (en) | 2012-10-25 |
CN101308781A (zh) | 2008-11-19 |
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