JP5173938B2 - 薄膜トランジスタの製造方法 - Google Patents
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Description
トランジスタの製造方法に関するものである。
図1と図2を参照すると、本発明の実施例1は、トップゲート型(Top Gate Type)薄膜トランジスタ10の製造方法を提供する。該製造方法は、下記のステップを含む。
図6と図7を参照すると、本実施例は、ボトムゲート型(Bottom Gate Type)薄膜トランジスタ20の製造方法を提供する。該製造方法は、前記実施例1の薄膜トランジスタ10の製造方法と基本的に同じである。
図8を参照すると、本施例は、トップゲート型薄膜トランジスタアレイの製造方法を提供する。該製造方法は、前記実施例1の薄膜トランジスタの製造方法と基本的に同じである。異なる所は、本実施例が一つの絶縁基板に複数の薄膜トランジスタを形成し、薄膜トランジスタアレイを形成することである。具体的には、下記のステップを含む。
本実施例は、ボトムゲート型薄膜トランジスタアレイの製造方法を提供する。該製造方法は、前記実施例2の製造方法と基本的に同じで、具体的には、下記のステップを含む。
カーボンナノチューブの原料を提供する第一ステップと、前記カーボンナノチューブの原料を溶剤に浸漬し、該カーボンナノチューブの原料を処理して、綿毛構造のカーボンナノチューブ構造体を形成する第二ステップと、前記綿毛構造のカーボンナノチューブ構造体をろ過して、綿毛構造のカーボンナノチューブ構造体を取り出す第三ステップと、絶縁基板を提供し、該絶縁基板の表面に複数のゲート電極を形成する第四ステップと、前記の複数のゲート電極を被覆させるように絶縁層を形成する第五ステップと、前記絶縁層の表面に少なくとも、一つの綿毛構造のカーボンナノチューブ構造体を設置し、該綿毛構造のカーボンナノチューブ構造体をパターン化し、複数の半導体層を形成し、該複数の半導体層が前記絶縁層により複数の前記ゲート電極に対向し、絶縁的に設置される第六ステップと、前記半導体層の表面に、ソース電極及びドレイン電極を分離して形成し、該ソース電極及びドレイン電極を前記半導体層に電気的に接続させる第七ステップと、を含む。
110、210 絶縁基板
120、220 ゲート電極
130、230 絶縁層
140、240 半導体層
151、251 ソース電極
152、252 ドレイン電極
Claims (5)
- カーボンナノチューブの原料を提供する第一ステップと、
前記カーボンナノチューブの原料を溶剤に浸漬した後、超音波式分散、又は高強度攪拌又は振動の方法により、綿毛構造のカーボンナノチューブ構造体を形成する第二ステップと、
前記綿毛構造のカーボンナノチューブ構造体を含む溶液をろ過して、前記綿毛構造のカーボンナノチューブ構造体を取り出す第三ステップと、
絶縁基板を提供し、該絶縁基板に第三ステップで取り出された前記綿毛構造のカーボンナノチューブ構造体を設置し、該綿毛構造のカーボンナノチューブ構造体を半導体層とする第四ステップと、
前記半導体層にソース電極及びドレイン電極を分離して形成し、該ソース電極及びドレイン電極をそれぞれ、前記半導体層に電気的に接続させる第五ステップと、
前記半導体層に絶縁層を形成する第六ステップと、
前記絶縁層の表面にゲート電極を形成し、薄膜トランジスタを形成する第七ステップと、
を含み、
前記第三ステップでは、前記綿毛構造のカーボンナノチューブ構造体に所定の圧力を加え、前記綿毛構造のカーボンナノチューブ構造体に残留した溶剤を除去するかまたは、エアーポンプファネルを提供し、前記綿毛構造のカーボンナノチューブ構造体を前記エアーポンプファネルに置き、該エアーポンプファネルに抽気し、乾燥させることを特徴とする薄膜トランジスタの製造方法。 - カーボンナノチューブの原料を提供する第一ステップと、
前記カーボンナノチューブの原料を溶剤に浸漬した後、超音波式分散、又は高強度攪拌又は振動の方法により、綿毛構造のカーボンナノチューブ構造体を形成する第二ステップと、
前記綿毛構造のカーボンナノチューブ構造体を含む溶液をろ過して、前記綿毛構造のカーボンナノチューブ構造体を取り出す第三ステップと、
絶縁基板を提供し、該絶縁基板の表面にゲート電極を形成する第四ステップと、
前記ゲート電極を被覆させるように絶縁層を形成する第五ステップと、
第三ステップで取り出された前記綿毛構造のカーボンナノチューブ構造体を前記絶縁層の表面に設置し、前記絶縁層に半導体層を形成する第六ステップと、
前記半導体層にソース電極及びドレイン電極を分離して形成し、該ソース電極及びドレイン電極を前記半導体層に電気的に接続させる第七ステップと、
を含み、
前記第三ステップでは、前記綿毛構造のカーボンナノチューブ構造体に所定の圧力を加え、前記綿毛構造のカーボンナノチューブ構造体に残留した溶剤を除去するかまたは、エアーポンプファネルを提供し、前記綿毛構造のカーボンナノチューブ構造体を前記エアーポンプファネルに置き、該エアーポンプファネルに抽気し、乾燥させることを特徴とする薄膜トランジスタの製造方法。 - 前記第三ステップにおける、前記綿毛構造のカーボンナノチューブ構造体に所定の圧力を加え、前記綿毛構造のカーボンナノチューブ構造体に残留した溶剤を除去するステップでは、前記綿毛構造のカーボンナノチューブ構造体を含む溶剤を濾紙が置かれたファネルにつぎ、しばらく放置して、乾燥させると、綿毛構造のカーボンナノチューブ構造体が分離され、分離された前記綿毛構造のカーボンナノチューブ構造体を容器に置き、前記綿毛構造のカーボンナノチューブ構造体を所定の形状に展開し、展開された前記綿毛構造のカーボンナノチューブ構造体に所定の圧力を加え、前記綿毛構造のカーボンナノチューブ構造体に残留した溶剤を焙り、或いは、該溶剤が自然に蒸発することを特徴とする、請求項1または2に記載の薄膜トランジスタの製造方法。
- 前記第三ステップにおける、エアーポンプファネルを提供し、前記綿毛構造のカーボンナノチューブ構造体を前記エアーポンプファネルに置き、該エアーポンプファネルに抽気し、乾燥させるステップでは、微多孔膜とエアーポンプファネルを提供し、前記綿毛構造のカーボンナノチューブ構造体を含む溶剤を前記微多孔膜を通して前記エアーポンプファネルにつぎ、該エアーポンプファネルに抽気し、乾燥させることを特徴とする、請求項1または2に記載の薄膜トランジスタの製造方法。
- 前記ソース電極及び前記ドレイン電極を設置した後で、前記綿毛構造のカーボンナノチューブ構造体における、金属型カーボンナノチューブを除去することを特徴とする、請求項1から4のいずれか一項に記載の薄膜トランジスタの製造方法。
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