Patent ID: 7638440

Claim:
A method for processing a substrate in a processing chamber, comprising: forming a dielectric material layer on a surface of the substrate; depositing one or more amorphous carbon layers consisting essentially of hydrogen and carbon on the dielectric material layer by a process comprising: introducing a processing gas comprising one or more hydrocarbon compounds without containing silicon and an argon carrier gas; generating a plasma of the processing gas by applying power from a dual-frequency RE source; etching the one or more amorphous carbon layers to form a patterned amorphous carbon layer; etching feature definitions in the dielectric material layer corresponding to the patterned one or more amorphous carbon layers; depositing an anti-reflective coating on the one or more amorphous carbon layers; depositing and patterning resist material on the anti-reflective coating; and etching the anti-reflective coating prior to or concurrent with etching the one or more amorphous carbon layers.