Patent ID: 6149778
Filing Date: 2000-11-21
Classification: H01L

Abstract:
A process for forming a device, comprising the step of:depositing on a substrate an amorphous fluorinated carbon layer by sputter deposition, the sputter deposition utilizing at least one solid target in the absence of intentionally-added gaseous fluorine-containing, gaseous carbon-containing, or gaseous hydrogen-containing sources,wherein the substrate is cooled to less than -100.degree. C. during the deposition or the at least one solid target is arranged to provide an oblique target angle of about 20.degree. or less with respect to the surface of the substrate, such that the layer comprises at least 10 volume percent porosity, andwherein the layer comprises 20 to 60 atomic percent fluorine, comprises less than 10 atomic percent hydrogen, exhibits a dielectric constant of 3.0 or less at 1 MHz and room temperature, and is thermally stable up to at least 350.degree. C.