Reactive ion etching of silica structures

C - Chemistry – Metallurgy – 03 – C

Patent

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Details

C03C 15/00 (2006.01) C03C 17/32 (2006.01) C23C 14/04 (2006.01) C23C 14/12 (2006.01) C23C 14/32 (2006.01) C23C 14/54 (2006.01) C23C 16/30 (2006.01) G02B 6/12 (2006.01) G02B 6/13 (2006.01) G02B 6/136 (2006.01)

Patent

CA 2265617

The invention relates to a method for etching of silica-based layers/substrates by reactive ion etching system (10) using an etching gas mixture of CHF3/AR through a photoresist mask. Reactive ion etching is carried out under conditions of simultaneous isotropic deposition of a carbon-based polymer where the polymer deposition rate is controlled by adjusting process control parameters of RF power, sample temperature, O2 and CF4 additions.

L'invention concerne un procédé de gravure de couches/substrats à base de silicium par un système (10) d'attaque par ions réactifs, qui utilise un mélange gazeux de gravure constitué de CHF¿3?/AR à travers un masque en résine photosensible. La gravure par ions réactifs est effectuée dans des conditions de dépôt isotrope simultané d'un polymère à base de carbone, la vitesse de dépôt du polymère étant régulée par ajustement des paramètres de régulation de l'opération, à savoir des paramètres de puissance radioélectrique, de température d'échantillon et d'additions d'O¿2? et de CF¿4?.

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