Patent ID: 7635422
Filing Date: 2009-12-22
Classification: G01N

Abstract:
1. An electrode plate for electrochemical measurements comprising a substrate made of an insulator, an upper layer made of an insulator provided on an upper face of the substrate, a lower layer made of an insulator provided on a lower face of the substrate, a first electrode body sandwiched between the upper face of the substrate and the upper layer, and a second electrode body sandwiched between the lower face of the substrate and the lower layer, wherein: the upper layer has a plurality of upper layer through-holes; the first electrode body has a plurality of first electrodes comprising a portion exposed from an upper face of the upper layer via the upper layer through-hole in the first electrode body; the substrate has a plurality of substrate through-holes; and the second electrode body has a plurality of second electrodes comprising a portion exposed from the upper face of the upper layer via the upper layer through-hole and the substrate through-hole in the second electrode body in the second electrode body, and wherein: on a plane view, any of the plurality of substrate through-holes does not overlap with the first electrode body; four second electrodes are disposed around the each first electrode, with an even distance between centers of the first electrode and the second electrode; four first electrodes are disposed around the each second electrode, with an even distance between centers of the second electrode and the first electrode, an area of the each first electrode is all substantially the same as an area of the each second electrode.