Sensor substrate arrangement for a particulate sensor device

A sensor substrate, comprising:

• an insulating substrate having a first surface;
• sensing electrodes disposed in the insulating substrate, the sensing electrodes being columnar and being composed of at least two pairs of positive and negative sensing electrodes, in the at least two pairs of positive and negative sensing electrodes, a first part of a positive electrode and a second part of a negative electrode being each exposed from the first surface of the insulating substrate;
• and
• innerlayer wiring lines embedded within the insulating substrate, the innerlayer wiring lines corresponding to the positive electrode and the negative electrode, respectively, in the at least two pairs of positive and negative sensing electrodes,
• wherein the innerlayer wiring lines comprises first lines corresponding each of the positive electrode in the at least two pairs of positive and negative sensing electrode and comprises second lines corresponding each of the positive electrode in the at least two pairs of positive and negative sensing electrode.