Electrostatic, or anodic, bonding is a process used to attach a silicon top wafer to a glass substrate and also to attach silicon to silicon. Anodic bonding attaches a silicon wafer, either with or without an oxidized layer, to a borosilicate (Pyrex) glass heated to about 400°C when 500V or more is applied across the structure [4]. An example of a product manufactured with anodically bondedsilicon to glass is the silicon capacitive absolute pressure (SCAP) sensing ele-ment shown in Figure 2.4 [11].