Importance

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Abstract

A honeycomb filter, including:

a honeycomb structure,wherein the honeycomb structure includes a platinum group element-containing catalyst layer,the platinum group element-containing catalyst layer is disposed only on a side of an inner surface of the partition walls surrounding the inflow cells, andthe platinum group element-containing catalyst layer is disposed in a range of at least up to 40% with respect to an overall length of the cells starting from the outflow end face and is not disposed in a range of at least up to 30% with respect to the overall length of the cells starting from the inflow end face, in an extending direction of the cells of the honeycomb structure.

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First Claim