Chemistry Reference
In-Depth Information
The electrical properties of anodic oxides in electrolytes, that is, electrochemical
properties, tend to vary with the anodization system. Figure 3.31 shows the
current-voltage curves of anodically formed oxides in the forming electrolyte.
117
The
voltage necessary to drive a given current anodically differs greatly from that cathod-
ically. For
n
-Si the voltage under the given cathodic current is almost constant whereas
it increases with oxide thickness under an anodic polarization. For
p-
Si the anodic
