Patent ID: 8703004

Claim:
A method for chemical planarization, comprising: forming a surface layer on a to-be-processed film having irregularity, the to-be-processed film including convex portions and concave portions, the to-be-processed film being a silicon oxide film, the surface layer binding to or adsorbing onto the to-be-processed film along the irregularity to suppress dissolution of the to-be-processed film, the surface layer including first portions located on the convex portions and second portions located on the concave portions; and planarizing the to-be-processed film in a processing solution configured to dissolve the to-be-processed film, by rotating the to-be-processed film and a processing body including a catalyst material while the to-be-processed film contacts the processing body via the surface layer, removing at least a part of the first portions by oxidation with radicals near the catalyst material to expose at least a part of the convex portions, removing the first portions while leaving the second portions and making dissolution degree of the convex portions larger than dissolution degree of the concave portions.