Particulate matter detection element, particulate matter detection sensor, and method of manufacturing particulate matter detection element

Abstract

A particulate matter detection element for detecting particulate matter in a gas to be measured includes flat-shaped conductor layers, flat-shaped insulating layers, a laminated structure in which the conductor layers and the insulating layers are alternately laminated, and a detecting unit having the conductor layers of different polarities as a pair of detection electrodes on a cross section of the laminated structure. The conductor layers each have a constant thickness, and include conductor layer planar portions having a stripped-pattern cross section, and tapered conductor layer end edge portions each having a triangular cross section, provided on both sides of the respective conductor layer planar portions.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This is a divisional of U.S. application Ser. No. 15 / 110,447, filed Jul. 8, 2016 which is the U.S. national phase of International Application No. PCT / JP2015 / 050508, filed 9 Jan. 2015, which designated the U.S. and is based on and claims the benefit of priority from earlier Japanese Patent Application No. 2014-2882 filed Jan. 10, 2014, the description of each of which are incorporated herein by reference.BACKGROUND OF THE INVENTIONTechnical Field[0002]The present disclosure relates to a particulate matter detection element favorably used for an exhaust gas purification system of a vehicle internal combustion engine to detect particulate matter present in an exhaust gas that is a gas to be measured, and relates to a particulate matter detection sensor, and a method of manufacturing the particulate matter detection element.Background Art[0003]Particulate matter detection sensors that detect particulate matter in various gases to be measured...

AI Technical Summary

Benefits of technology

The solution effectively minimizes electric field concentration at electrode end portions, stabilizing detection accuracy and reducing variations in insensible mass, thereby improving the reliability and precision of particulate matter detection.

Problems solved by technology

The resistance measurement electrodes have a laminated structure in which conductor layers and insulating layers are alternately laminated using thick-film printing and green sheets to accurately form electrodes with a distance of 50 μm or less therebetween, which has been difficult to achieve with conventional thick-film printing.

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