Laminated filter material, its fabricating method and filter using a laminated filter material

Abstract

A laminated filter material for removing foreign materials from gas or liquid with high precision, its fabricating method and a filter using a laminated filter material are described. The laminated filter material comprises a support member of porous metal and a particle layer of fine particles laminated on a surface having asperities of the support member, by immersing the support member in a suspension of the particles without a binder, and evacuating the suspension through the support member. The method for fabricating includes the steps of preparing a suspension of particles finer than the average pore diameter of support member without using a binder, immersing the support member, and evacuating the suspension through the support member. The filter has a housing for supporting the laminated filter material, wherein the housing is provided with a metal attachment part having a surface contacting an end-face of the laminated filter material, and the attachment part and end-face of the laminated filter material are fixed by fusing the particle layer from the reverse side of the contacting surface of the attachment part.

Dependencies are inferred from the claim text.