Patent ID: 11892422
Assignee: IBIDEN CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A particulate-matter detecting sensor element for detecting particulate-matters in a gas to be measured comprising:
an insulating substrate having a detecting face to which particulate matters adhere;
a plurality of detecting conductors formed in the insulating substrate, the detecting conductors having mutually different polarity; and
a heating section formed at the insulating substrate; wherein each detecting conductor includes:
a detecting electrode part at least partly exposed to the detecting face;
a terminal part formed on an external surface of the insulating substrate and electrically connected to the detecting electrode part; and
a connecting part that electrically connects the detecting electrode part and the terminal part, wherein
at least a portion of the detecting conductor including the detecting electrode part is constituted of a noble metal conductor formed mainly of at least one noble metal selected from Pt, Au, Pd, Rh, and Ir;
at least a portion of the connecting part is constituted of a low expansion conductor formed mainly of a low expansion coefficient metal which linear expansion coefficient is lower than that of the noble metal, and wherein
the noble metal conductor and the low expansion conductor are joined at an overlapping part at which the noble metal conductor and the low expansion conductor are partly overlapped with each other on an insulating layer which forms the insulating substrate in a normal line direction of the insulating layer.