[Potironette]

Err what does a semiconductor have to do with computers?
What's the difference between a semiconductor and a not-so-bad conductor? Or, why is it that being a semi-conductor is special?
On second thought, what is the definition of a metal exactly? Of a metalloid o_o?

What is the "bias of the electric field"? That current can flow only in one direction at a time..?

Undoped silicon doesn't take much to give up electrons, and so its electrons get pulled into..either layer o_o? But maybe electrons can only flow one way(?) so it just goes to the top as the electrons on the n-layer move to the p-layer...?