POROUS METALLIC FILTER FOR GAS

摘要

PROBLEM TO BE SOLVED: To provide a filter capable of ensuring high filtering precision by easily and economically forming many fine through-holes 5 as compared with a conventional technology and repeatedly usable by reducing the energy loss at filtering. SOLUTION: In the filter for removing the foreign matter 21 in fluid 20 by permeating the fluid 20 through a fluid permeable filter medium 1-a, the filter medium 1-a is composed of the porous metal formed by dissolving a gas atom in molten metal and solidifying the molten metal, and the pore 6 of the porous metal 6 constitutes the linearly formed through-holes 5 becoming the passage of the fluid 20.