The Influence of Blood Glucose Meter Resistance Variation on the Performance of a Biosensor with a Gold-Coated Circuit Board

Figure 1

Schematic diagram of the gold-coated blood glucose test strip: (a) reaction zone electrode of the blood glucose test strip, (b) circuit layout of the reaction zone electrode, and (c) layer structure of the conducting material. The purpose of electroplating is to deposit a thin gold film on the copper layer. However, when gold contacts the copper layer directly, the physical phenomenon of electron diffusion will occur (due to difference in potential). Therefore, a layer of nickel must be coated in-between gold and copper, acting as the buffer layer. Such process is called the nickel-gold electroplating process.