Abstract: Exemplary methods of semiconductor processing may include etching a first portion of a feature in a substrate disposed within a processing region of a semiconductor processing chamber. The first portion of the feature may at least partially extend through one or more layers of material formed on the substrate. The methods may include providing a carbon-containing precursor to the processing region of the semiconductor processing chamber. The methods may include generating plasma effluents of the carbon-containing precursor. The methods may include contacting the substrate with the plasma effluents of the carbon-containing precursor. The methods may include forming a carbon-containing material on the substrate. The carbon-containing material may line the first portion of the feature at least partially extending through the one or more layers of material formed on the substrate. The carbon-containing material may be formed in the same chamber where the feature is etched.