Patent ID: 8153073

Claim:
A honeycomb filter comprising: a ceramic block having a peripheral face with irregularities and comprising: a plurality of honeycomb fired bodies each having a longitudinal direction and a plurality of cell walls extending along the longitudinal direction to define a plurality of cells each sealed at either one of both ends of each of said cells, the plurality of honeycomb fired bodies comprising at least one of silicon carbide and silicon-containing silicon carbide; an adhesive layer provided between the plurality of honeycomb fired bodies to connect the plurality of honeycomb fired bodies; and the irregularities on the peripheral face comprising a projected portion formed by a part of the plurality of cell walls; and a sealing material layer provided on the peripheral face of said ceramic block in accordance with the irregularities on the peripheral face so that an outer peripheral surface of the honeycomb filter has surface irregularities thereon, wherein a thickness of the sealing material layer is less than a maximum depth of the irregularities on the peripheral face such that the sealing material layer does not fill all of the irregularities on the peripheral face.