Importance

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Abstract

The present invention provides an exhaust gas purifying filter capable of efficiently burning and removing particulates captured by a partition wall, and a production method thereof. This exhaust gas purifying filter (CSF) of the present invention includes at least a honeycomb substrate having a porous partition wall configured to capture particulates (PM) such as soot in exhaust gas, and a catalyst carried by the honeycomb substrate and configured to burn and remove the particulates captured by the partition wall of the honeycomb substrate and deposited within cells, wherein the catalyst is carried concentrically in a shallow portion from the surface of the cell wall on the exhaust gas inflow side of the honeycomb substrate, and 65% or more of the total mass of the catalyst is present in a depth region from the surface of the cell wall of the honeycomb substrate up to 2/10 a with reference to the wall thickness a of the partition wall.

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First Claim