Pillar-shaped honeycomb structure filter and method for manufacturing same

A method for manufacturing a pillar-shaped honeycomb structure filter, comprising:

• preparing a pillar-shaped honeycomb structure body, comprising a plurality of first cells extending from an inlet side end surface to an outlet side end surface, opening on the inlet side end surface and having a sealing portion on the outlet side end surface;
• and a plurality of second cells extending from the inlet side end surface to the outlet side end surface, having a sealing portion on the inlet side end surface and opening on the outlet side end surface, the plurality of first cells and the plurality of second cells alternately arranged adjacent to each other with a porous partition wall interposed therebetween;
• adhering ceramic particles to a surface of the first cells by injecting an aerosol containing ceramic particles from a nozzle of an aerosol generator toward the inlet side end surface from a direction perpendicular to the inlet side end surface, while applying a suction force to the outlet side end surface to suck the injected aerosol from the inlet side end surface;
• and
• performing a baking treatment on the ceramic particles adhered to the surface of the first cells to generate a porous film composed of a plurality of particles on the surface of the first cells;
• wherein the aerosol generator has an accommodating section that accommodates the ceramic particles having a BET specific surface area of 3.5 m2/g or more, and the ceramic particles are configured to be supplied from the accommodating section to the nozzle.