Patent ID: 8820139

Claim:
A particulate matter detection device comprising: a plate-like element base material; a pair of measurement electrodes arranged in the element base material; characteristics measurement means for measuring electric characteristics between the pair of measurement electrodes; and particulate matter amount calculation means for obtaining an amount of a particulate matter collected in and around the pair of measurement electrodes on the basis of a change amount of the electric characteristics measured by the characteristics measurement means, wherein the measurement electrodes constituting the pair of measurement electrodes are combteeth-like electrodes each including a plurality of planarly arranged combteeth portions, and a comb spine portion which connects the plurality of combteeth portions of each of the measurement electrodes to one another at one end of each of the plurality of combteeth portions, the combteeth portions of the measurement electrodes are arranged to engage with each other with a space being left therebetween, and a comb spine covering portion made of a dielectric material covers the comb spine portion of at least one of the measurement electrodes without extending over at least part of the surfaces of the plurality of combteeth portions of the pair of measurement electrodes wherein the element base material is a device main body which includes at least one through hole formed in one end thereof and which is elongated in one direction, and the pair of measurement electrodes are arranged on an inner side surface of one wall which forms the through hole or in the wall, and the comb spine covering portion is formed by a wall extending vertically from the wall on which the pair of measurement electrodes are arranged, among the walls which form the through hole.