Patent ID: 8470187

Claim:
A method of depositing a film with a target non-conformality on a patterned substrate, comprising: providing a substrate having a convex pattern and a bottom surface, said convex pattern having a vertical portion with a top which is at least partially rounded; depositing a first film on the convex pattern and the bottom surface; and depositing a second film on the first film, thereby forming a film having a target non-conformality for forming a spacer therefrom, which film is constituted by the first and second films integrated on the substrate, wherein the convex pattern of the substrate is constituted by a photo resist pattern, wherein one of the first and second films is a conformal film which is non-flowable when being deposited and has a conformality of about 80% to about 100%, and the other of the first and second films is a flowable film which is flowable when being deposited, wherein the target non-conformality of the film constituted by the first and second films integrated is achieved by changing a duration of the step of depositing the first film and a duration of the step of depositing the second film.