Patent ID: 7629031

Claim:
A method of coating an interior surface within a workpiece comprising: forming a first film on said interior surface from a first plasma under film deposition conditions within said workpiece, including establishing said film deposition conditions such that said first plasma is within said workpiece and ions from said first plasma form said first film; and exposing said first film to bombardment of ions from a second plasma under ion bombardment conditions within said workpiece, including establishing said ion bombardment conditions such that said second plasma is within said workpiece, said exposing further including providing plasma activation energy sufficient to induce reaction of said first film so as to bond with material of said workpiece as a consequence of inter-diffusion of material constituents of said first film with material constituents of said interior surface on which said first film was formed, said exposing being implemented to induce said reaction of said first film upon completion of said forming of said first film.