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Silicon
is the raw material most often used in integrated 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, 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 prope ....
Word count: 1438 - Page count: 6
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