<p><b>a</b>:metalic conductor type
</p>
<ul><li><b>b</b>:Isolator type</li>
<li><b>c</b>:Semiconductor</li>
<li><b>E<sub>f</sub></b>: Fermi energy</li></ul><p>---
</p>
<ul><li>Create by <a href="//commons.wikimedia.org/wiki/User:Pixeltoo" title="User:Pixeltoo">pixeltoo</a> -- 24 july 2005.</li></ul>
No machine-readable author provided. <a href="//commons.wikimedia.org/wiki/User:Pixeltoo" title="User:Pixeltoo">Pixeltoo</a> assumed (based on copyright claims).
24 July 2005 (original upload date)
No machine-readable source provided. Own work assumed (based on copyright claims).