Patent ID: 7803452

Claim:
A release film comprising: a base material having both major surfaces; a releasing agent layer provided on one major surface of the base material, the releasing agent layer having an outer surface having a surface roughness; an antistatic layer provided on the other major surface of the base material, the antistatic layer having an outer surface having a surface roughness; and a green sheet provided on the outer surface of the releasing agent layer; wherein the releasing agent layer and the antistatic layer are mainly composed of the same material, and the material constituting the releasing agent layer is a silicone-based resin, long-chain alkyl-based resin, fluorine-based resin or alkyd-based resin, wherein the surface roughness of the outer surface of the releasing agent layer is defined as Ra 1 [nm] and the surface roughness of the outer surface of the antistatic layer is defined as Ra 2 [nm], such that Ra 1 ≦15, Ra 1 <2Ra 2 , and 10≦Ra 2 ≦50 are satisfied.