Patent ID: 7429416

Claim:
A honeycomb structure comprising: a plurality of partition walls divided into a first set of substantially parallel partition walls and a second set of substantially parallel partition walls, the first set of partition walls and the second set of partition walls being substantially perpendicular to each other, and a plurality of cells arranged in parallel with one another to communicate between two end surfaces of the honeycomb structure being formed by the first and second sets of partition walls, the plurality of partition walls being made of a ceramic, and having two or more types of thicknesses, the plurality of partition walls including a plurality of thick partition walls and a plurality of thin partition walls, the thick partition walls being thicker than the thin partition walls, the partition walls of the first set of partition walls being arranged so that each thin partition wall is sequentially next to a thick partition wall and each thick partition wall is sequentially next to a thin partition wall, the partition walls of the second set of partition walls being arranged so that each thin partition wall is sequentially next to a thick partition wall and each thick partition wall is sequentially next to a thin partition wall, and wherein a value of a ratio of the thickness of any given thin partition wall and any given thick partition wall is between 1.6 and 4.0 inclusive.