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Particulate matter detection element and method of manufacturing same

  • US 9,528,971 B2
  • Filed: 03/18/2013
  • Issued: 12/27/2016
  • Est. Priority Date: 04/27/2012
  • Status: Active Grant
First Claim
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1. A particulate matter detection element for detecting particulate matter contained in a measured gas comprising:

  • an electrode layer laminated body which is made up of a plurality of first electrode layers, a plurality of second electrode layers, and a plurality of intermediate insulating layers, the first electrode layers and the second electrode layers being stacked to overlap each other in a lamination direction with each of the intermediate insulating layers being disposed between one of the first electrode layers and an adjacent one of the second electrode layers, thereby forming a detection surface and a mounting surface of the electrode layer laminated body, the detection surface and the mounting surface being opposed to each other through a thickness of the electrode layer laminated body in a direction perpendicular to the lamination direction and towards an electrode drawing layer,the electrode drawing layer including a first electrical conductor and a second electrical conductor configured to transmit a signal via an electrical connection, the signal representing one of a resistance, a capacitance and a impedance between each of the first electrode layers and an adjacent one of the second electrode layers as an electrical characteristic varying depending on an amount of particulate matter present between the pair of the detection electrodes;

    whereinthe first and second electrode layers and the intermediate insulating layers each have a plate-like shape and a thickness in a range between 3 μ

    m and 20 μ

    m,the detection surface of the electrode layer laminated body is exposed to outside,the mounting surface is in physical contact with an insulating substrate, andthe first electrode layers are electrically connected to the first electrical conductors through respective electrical joints, and the second electrode layers are electrically connected to the second electrical conductor through respective electrical joints.

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