Abstract:
Embodiments described herein generally relate to the fabrication of integrated circuits and more particularly to nitrogen doped amorphous carbon layers and processes for depositing nitrogen doped amorphous carbon layers on a semiconductor substrate. In one embodiment, a method of forming a nitrogen doped amorphous carbon layer on a substrate is provided. The method comprises positioning a substrate in a substrate processing chamber, introducing a nitrogen containing hydrocarbon source into the processing chamber, introducing a hydrocarbon source into the processing chamber, introducing a plasma-initiating gas into the processing chamber, generating a plasma in the processing chamber, and forming a nitrogen doped amorphous carbon layer on the substrate.
Abstract:
A method of forming a nitrogen-doped amorphous carbon layer on a substrate in a processing chamber is provided. The method generally includes depositing a predetermined thickness of a sacrificial dielectric layer over a substrate, forming patterned features on the substrate by removing portions of the sacrificial dielectric layer to expose an upper surface of the substrate, depositing conformally a predetermined thickness of a nitrogen-doped amorphous carbon layer on the patterned features and the exposed upper surface of the substrate, selectively removing the nitrogen-doped amorphous carbon layer from an upper surface of the patterned features and the upper surface of the substrate using an anisotropic etching process to provide the patterned features filled within sidewall spacers formed from the nitrogen-doped amorphous carbon layer, and removing the patterned features from the substrate.