Patent ID: 9005342
Filing Date: 2015-04-14
Classification: B01D

Abstract:
1. A filter made of resin comprising: a through-hole film portion; and a structure reinforce portion, wherein a through-hole is provided in the through-hole film portion, the thickness of the through-hole film portion is from 0.5 to 2.0 μm, the bore of the through-hole is from 0.05 to 0.5 μm, the thickness of the structure reinforce portion is bigger than the thickness of the through-hole film portion, the structure reinforce portion encloses the through-hole film portion, and a damage-reduction structure is provided on an upper surface of the structure reinforce portion, wherein the damage-reduction structure is at least one of an uneven structure, a low surface energy layer with a surface energy that is smaller than a surface energy of the structure reinforce portion, and a low elastic modulus layer with an elastic modulus that is smaller than an elastic modulus of the structure reinforce portion, and wherein the uneven structure is a convex curved surface or a concave curved surface.