フッ素系ガスプラズマRIEを用いたLiNbO<sub>3</sub>結晶のマスクを使用しない微細表面加工

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タイトル別名
  • Fine Surface Processing of LiNbO<sub>3</sub> Crystal Etched without Mask Using Fluorine System Gas Plasma RIE
  • フッ素系ガスプラズマRIEを用いたLiNbO3結晶のマスクを使用しない微細表面加工
  • フッソケイ ガスプラズマ RIE オ モチイタ LiNbO3 ケッショウ ノ マスク オ シヨウ シナイ ビサイ ヒョウメン カコウ

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抄録

Etching characteristic LiNbO3 single crystal has been investigated using plasma RIE (Reactive Ion Etching) with mixture gases of CF4/Ar, CF4/H2, CF4/Ar/H2. The etched surface was evaluated by means of atomic force microscopy. The etched rate for -Z surface of LiNbO3 single crystal was higher than +Z surface using CF4/Ar and CF4/H2 mixture gases. Possibility of the deep etching at the boundary between -Z surface and +Z surface for partially polarization-reversed LiNbO3 without mask was investigated. The best condition of the deep etching was obtained by using CF4/H2 mixture gas. The value of aspect ratio is approximately 1.0 on this condition.

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