Patent ID: 9523632
Filing Date: 2016-12-20
CPC Classification: F01N,G01M,G01N

Claim Text:
1. A particulate matter sensor to detect particulate matter in a gas to be measured, the particulate matter sensor comprising: a cover including a plurality of holes, the cover located in a path of the gas; an insulating body inside the cover; and a pair of electrodes which is disposed on a main surface of the insulating body and positioned apart from each other; wherein the insulating body includes, on a part of the main surface which is sandwiched between the pair of the electrodes and where the pair of the electrodes is not formed, an insulating portion being higher than the pair of the electrodes in a direction perpendicular to the main surface, and wherein a difference between a height of a surface of the electrodes and a height of a surface of the insulating portion is less than half of a distance between midpoints of two adjacent electrodes.