Аннотация:Cryogenic etching is applied to a k = 2.3 porous organosilicate (OSG) low-k material. Plasma-induced damage is reduced due
to protective effect of etch by-products, which condense in the low-k material at low temperature. Almost no carbon depletion is
observed when the chuck temperature is below −70◦C in pure SF6 plasma. By addition of SiF4 and O2 into the gas discharge,
plasma-induced damage could be further reduced as a result of enhanced SiOxFy passivation.