Patent ID: 7294316

Claim:
A honeycomb structure comprising a plurality of honeycomb segments each having: a number of through-channels separated from each other by partition walls, said through-channels terminating in a portion of a honeycomb structure end face and bounded by two planes and a side surface; wherein said honeycomb structure is formed as a unified body by bonding a plane of each said plurality of honeycomb segments to a plane of another honeycomb segment substantially parallel to a direction of said through-channels with a bonding material comprising components that are substantially the same as the components constituting the honeycomb segments; wherein each plane of each honeycomb segment includes an unbonded area immediately adjacent a periphery of the honeycomb structure end face and comprising an edge portion opening to said periphery of the honeycomb structure end face; and wherein at least a part of the unbonded area of each plane includes a filler material which is different and distinct from the bonding material and comprising a heat-resistent inorganic material.