JP4583797B2 - 半導体装置の作製方法 - Google Patents
半導体装置の作製方法 Download PDFInfo
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Images
Description
エッチングマスク材を選択的に形成する工程と、エッチング液で一度にエッチングして上層の高融点金属膜パターン幅を下層の高融点金属窒化物膜パターン幅より狭くする工程と、前記高融点金属膜パターンをマスクとして前記半導体層にn型またはp型を付与する不純物元素のドーピング処理を行う工程と、を有することを特徴とする半導体装置の作製方法である。
絶縁表面を有する基板上に発光素子を含む画素部を複数形成する工程と、
基板を一つの画素部ごとに分断する工程と、
分断した基板の端面と接するシール材でカバー材を固定する工程とを有することを特徴とする発光装置の作製方法である。
以下に本発明を用いた代表的なTFTの作製手順を簡略に図1を用いて示す。
本発明では大型基板から複数の発光装置を形成する多面取り工程を用い、基板を分断した後に、基板の端面および基板周縁部に接するシール材でカバー材を固着することにより、一枚あたりの面取り数を増やして生産性を上げて発光素子を用いた発光装置の製造コストの低減を図る。
11:下地絶縁膜
12:高融点金属膜
13:高融点金属窒化物膜
15:上層(ゲート電極)
16:下層(ゲート電極)
Claims (3)
- 絶縁表面を有する基板上に半導体層を形成する工程と、
前記半導体層を覆う、膜厚が10−30nmの酸化珪素膜又は酸化窒化珪素膜からなるゲート絶縁膜を形成する工程と、
成膜室に窒素ガス又は窒素ガスと希ガスを供給し、モリブデンからなるターゲットで反応性スパッタリングを行って、前記ゲート絶縁膜上に、膜厚が30−100nmの窒化モリブデン膜を形成する工程と、
成膜室に希ガスを供給し、前記モリブデンからなるターゲットでスパッタリングを行って、前記窒化モリブデン膜上に、膜厚が300−400nmのモリブデン膜を積層形成する工程と、
レジストベーク工程なしで、レジストマスクを選択的に形成する工程と、
前記レジストマスクをマスクとして、酢酸、硝酸、燐酸及び水を含む混酸で一度にエッチングして上層のモリブデン膜パターン幅を下層の窒化モリブデン膜パターン幅より狭くする工程と、
前記レジストマスクを除去する工程と、
前記モリブデン膜パターンをマスクとして、前記窒化モリブデン膜を通過させて、前記半導体層にn型またはp型を付与する不純物元素の第1のドーピング処理を行う工程と、
前記モリブデン膜パターン及び前記窒化モリブデン膜パターンをマスクとして前記半導体層にn型またはp型を付与する不純物元素の第2のドーピング処理を行う工程と、を有することを特徴とする半導体装置の作製方法。 - 請求項1において、
前記モリブデン膜及び前記窒化モリブデン膜はゲート電極であり、
前記第1のドーピング処理及び前記第2のドーピング処理により、前記半導体層にチャネル形成領域、2つのLDD領域及びソース領域及びドレイン領域が形成され、
前記2つのLDD領域の一方は前記チャネル形成領域及び前記ソース領域の間に設けられ、他方は前記チャネル形成領域及び前記ドレイン領域の間に設けられ、
前記LDD領域は前記ゲート絶縁膜を介して前記窒化モリブデン膜と重なっており、前記第1のドーピング処理によって付与された前記不純物元素を含み、
前記ソース領域及び前記ドレイン領域は、前記第1のドーピング処理によって付与された前記不純物元素及び前記第2のドーピング処理によって付与された前記不純物元素を含むことを特徴とする半導体装置の作製方法。 - 請求項1又は2において、前記混酸は前記ゲート絶縁膜をエッチングしないことを特徴とする半導体装置の作製方法。
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JP4953166B2 (ja) * | 2007-11-29 | 2012-06-13 | カシオ計算機株式会社 | 表示パネルの製造方法 |
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