circuit (IC) fabrication. It is the second most abundant
substance on the earth. It is extracted from rocks and
common beach sand and put through an exhaustive
purification process. In this form, silicon is the purist
industrial substance that man produces, with impurities
comprising less than one part in a billion. That is the
equivalent of one tennis ball in a string of golf balls
stretching from the earth to the moon.

Semiconductors are usually materials which have energy-band
gaps smaller than 2eV. An important property of
semiconductors is the ability to change their resistivity
over several orders of magnitude by doping. Semiconductors
have electrical resistivities between 10-5 and 107 ohms.
Semiconductors can be crystalline or amorphous. Elemental
semiconductors are simple-element semiconductor materials
such as silicon or germanium.

Silicon is the most common semiconductor material used
today. It is used for diodes, transistors, integrated
circuits,......

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Title: Silicon Toady
Approximate Word Count: 1293
Approximate Pages: 6 (250 words per double-spaced page)

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1. Silicon Toady
   

   silicon toady. circuit (IC) fabrication. It is the second most abundant
   substance on the earth. It is extracted from rocks and common ... ...