Patent ID: 8021975

Claim:
A plasma processing method for forming a film on a substrate, the method comprising the steps of: forming a CF film containing carbon and fluorine on the substrate by using a C a F b gas, with “b” satisfying an equation “b=2×a−2” wherein “a” is a number greater than 1; exposing the CF film to a plasma to reduce fluorine existing on a surface of the CF film; and forming an insulating film directly on the CF film by using an insulating material gas processed with a plasma, wherein the step of forming the insulating film includes the step of forming a Si x C x N z film on the CF film, where “y” and “z” satisfy an equation “y<z”, and the step of forming a Si x ,C y ,N z , film on the Si x C y N z film, where “y′” and “z′” satisfy an equation “y′>z′”.