JP4001821B2 - 有機電界効果トランジスタ用の自己整合接触ドーピング方法 - Google Patents
有機電界効果トランジスタ用の自己整合接触ドーピング方法 Download PDFInfo
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- JP4001821B2 JP4001821B2 JP2002580418A JP2002580418A JP4001821B2 JP 4001821 B2 JP4001821 B2 JP 4001821B2 JP 2002580418 A JP2002580418 A JP 2002580418A JP 2002580418 A JP2002580418 A JP 2002580418A JP 4001821 B2 JP4001821 B2 JP 4001821B2
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/30—Doping active layers, e.g. electron transporting layers
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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
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K10/00—Organic devices specially adapted for rectifying, amplifying, oscillating or switching; Organic capacitors or resistors having potential barriers
- H10K10/80—Constructional details
- H10K10/82—Electrodes
- H10K10/84—Ohmic electrodes, e.g. source or drain electrodes
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- H10K10/40—Organic transistors
- H10K10/46—Field-effect transistors, e.g. organic thin-film transistors [OTFT]
- H10K10/462—Insulated gate field-effect transistors [IGFETs]
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K10/00—Organic devices specially adapted for rectifying, amplifying, oscillating or switching; Organic capacitors or resistors having potential barriers
- H10K10/40—Organic transistors
- H10K10/46—Field-effect transistors, e.g. organic thin-film transistors [OTFT]
- H10K10/462—Insulated gate field-effect transistors [IGFETs]
- H10K10/466—Lateral bottom-gate IGFETs comprising only a single gate
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
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Description
1.電気伝導性有機化合物へ可逆的に拡散させ、
2.注入・拡散された化合物内で、電気伝導性有機化合物内の不純物を固定する化学反応を引き起こすのに高温を用いる場合、適切な波長の光を照射する工程である。
Claims (17)
- 電気伝導性有機化合物のドーピング方法であって、
活性化放射線の照射によって活性化可能な不純物を電気伝導性有機化合物に注入し、上記電気伝導性有機化合物に対して活性化放射線を照射することによって、活性化された不純物を電気伝導性有機化合物内に不可逆的に固定し、
照射後に、結合されていない不純物を、電気伝導性有機化合物から再び除去する方法。 - 上記電気伝導性有機化合物と共有結合、および/または配位結合を形成することによって、不純物を不可逆的に固定する、請求項1に記載の方法。
- 上記電気伝導性有機化合物は有機半導体である、請求項1または2のいずれかに記載の方法。
- 上記電気伝導性有機化合物への照射が部分的に行われる、請求項1〜3のいずれか1項に記載の方法。
- 上記部分的な照射は、フォトマスクを用いて実施される、請求項4に記載の方法。
- 上記電気伝導性有機化合物には、照射に使用される活性化放射線に対して不透過な光不透過領域があり、照射の間、電気伝導性化合物には照射されない部分が維持されており、これら非照射部分は、照射に用いられる放射線光源から電気伝導性有機化合物の方向を見ると光不透過領域の後ろに配置されている、請求項1〜5のいずれか1項に記載の方法。
- 上記光不透過領域は、ゲート電極によって形成されている、請求項6に記載の方法。
- 有機電界効果トランジスタの製造方法であって、
基板上に、ゲート電極、ソース接触部、ドレイン接触部、ゲート誘電体、および、有機半導体を蒸着し、前記有機半導体に対して、活性化放射線の照射によって活性化可能な不純物を注入し、活性化放射線を部分的に照射し、照射後に、結合されていない不純物を電気伝導性有機化合物から再び除去することにより、ソース接触部およびドレイン接触部に接する有機半導体領域に、有機半導体中の不純物を不可逆的に固定し、ソース接触部およびドレイン接触部に接する接触領域の電気伝導率を上昇させる方法。 - 上記部分的な照射のためにフォトマスクを塗布する、請求項8に記載の有機電界効果トランジスタの製造方法。
- 請求項8に記載の有機電界効果トランジスタの製造方法であって、
活性化放射線に対して透過性を有する基板上に、ゲート電極、および、ゲート電極から間隔をあけたソース・ドレイン接触部を蒸着させ、
基板を覆ってしまわないように、ゲート誘電体とソース接触部との間、およびゲート誘電体とドレイン接触部との間に間隔を保つように、ゲート電極上にゲート誘電体を蒸着させ、
基板、ソース接触部、ドレイン接触部、および、ゲート誘電体の上に、有機半導体を蒸着させ、
ゲート誘電体とソース接触部との間の間隔、および/または、ゲート誘電体とドレイン接触部との間の間隔に有機半導体を充填し、
活性化放射線を用いた照射によって活性化可能な不純物を有機半導体に注入し、上記活性化放射線を用いて基板を側面から照射することにより、ソース接触部およびドレイン接触部に隣接している有機半導体中の接触領域の電気伝導率を上昇させ、次に、余分な不純物を、有機半導体から除去する方法。 - ゲート電極、ソース接触部、およびドレイン接触部を同時に基板上に蒸着させる、請求項8〜10のいずれか1項に記載の方法。
- 上記ゲート誘電体が、活性化放射線を透過する性質を有する物質から形成されている、請求項8〜11のいずれか1項に記載の方法。
- ゲート電極(2)、前記ゲート電極(2)を絶縁しているゲート誘電体(3)、ソース接触部(4)、ドレイン接触部(5)、基板(1)、およびソース接触部(4)とドレイン接触部(5)との間に配置された有機半導体(6,7,8,9)を備えた、有機電界効果トランジスタであって、
上記有機半導体(6,7,8,9)が、ソース接触部(4)および/またはドレイン接触部(5)に隣接されており、有機半導体中に不可逆的に固定された不純物がドープされ、かつ高い電気伝導率を有する接触領域(8,9)を備えており、
ゲート誘電体(3)とソース接触部(4)との間に第1の間隔(11a)を有し、ゲート誘電体(3)とドレイン接触部(5)との間に第2の間隔(11b)を有し、それら間隔における上記接触領域(8,9)で有機半導体(6,7,8,9)が基板(1)上に直接備えられている、有機電界効果トランジスタ。 - 前面および裏面を備えており、前記裏面に、有機半導体によって形成される部分(8,9)が少なくとも1つ含まれている、請求項13に記載の有機電界効果トランジスタ。
- 上記裏面には、ソース接触部(4)またはドレイン接触部(5)によって形成される部分が、少なくとも1つ備えられており、上記部分は有機半導体からなる部分(8,9)に隣接している、請求項13または14に記載の有機電界効果トランジスタ。
- 上記不純物が、共有結合または配位結合によって有機半導体中で不可逆的に固定されている、請求項13〜15のいずれか1項に記載の有機電界効果トランジスタ。
- 請求項13〜16のいずれかに記載の有機電界効果トランジスタであって、
上記有機電界効果トランジスタを上から見て、ゲート電極(2)、ソース接触部(4)、および、ドレイン接触部(5)が、重なり合わず、
不可逆的に固定された不純物がドープされており、かつ高い電気伝導率を有する有機半導体の部分(8,9)が、ゲート電極(2)とソース接触部(4)との間、および/または、ゲート電極(2)とドレイン接触部(5)との間に配置されている、有機電界効果トランジスタ。
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