Patent ID: 8268118

Claim:
An apparatus for forming a feature in an etch layer, wherein the etch layer is supported by a substrate and wherein the etch layer is covered by a photoresist mask with photoresist features with a first CD, comprising: a plasma processing chamber, comprising: a chamber wall forming a plasma processing chamber enclosure; a substrate support for supporting a substrate within the plasma processing chamber enclosure; a pressure regulator for regulating the pressure in the plasma processing chamber enclosure; at least one electrode for providing power to the plasma processing chamber enclosure for sustaining a plasma; a gas inlet for providing gas into the plasma processing chamber enclosure; and a gas outlet for exhausting gas from the plasma processing chamber enclosure; a gas source in fluid connection with the gas inlet, comprising a control layer gas source; a deposition gas source; a profile shaping gas source; and an etchant gas source; a controller controllably connected to the gas source and the at least one electrode, comprising: at least one processor; and computer readable media, comprising: computer readable code for providing a control layer; comprising: computer readable code for providing a control layer gas from the control layer gas source to the plasma processing chamber enclosure; and computer readable code for transforming the control layer gas into a plasma; computer readable code for providing at least two deposition cycles to form a sidewall deposition on a photoresist mask and the control layer to form features with a second CD, within the photoresist features, comprising: computer readable code for providing a flow of a deposition gas from the deposition gas source to the plasma processing chamber enclosure; computer readable code for transforming the deposition gas into a plasma; computer readable code for stopping the flow of the deposition gas from the deposition gas source to the plasma processing chamber enclosure; computer readable code for providing a flow of a profile shaping gas from the profile shaping gas source to the plasma processing chamber enclosure after the flow of the deposition gas is stopped; computer readable cod for transforming the profile shaping gas into a plasma; and computer readable code for stopping the flow of the profile shaping gas from the profile shaping gas source to the plasma processing chamber enclosure; computer readable code for providing a flow of an etchant gas from the etchant gas source to the plasma processing chamber after completion of the at least two deposition cycles; and computer readable code for etching features in the layer, using the etchant gas wherein the features in the layer have a third CD.