Patent ID: 8864968
Filing Date: 2014-10-21
Classification: G01N,Y10T

Abstract:
1. An electrochemical sensor device comprising: a sensor chip having an integrated electrochemical sensor element; and a substrate having a first surface on which the sensor chip is mounted and a second surface; a reference electrode structure including a reference electrode and a gel-based electrolyte adjacent thereto, the reference electrode structure configured and arranged with the integrated electrochemical sensor element for sensing pH, the reference electrode structure connected to the sensor chip via an electrical connection on the first surface of the substrate; a liquid access opening through the substrate from the first surface of the substrate to the second surface of the substrate and configured and arranged to expose the integrated electrochemical sensor element; and a diffusion barrier layer covering the gel-based electrolyte and configured and arranged to mitigate out-diffusion of electrolytes from the gel-based electrolyte.