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Silicon
Title: Silicon
Category: Science & Technology / Chemistry
Details: Words: 1501 | Pages: 6.4 (approximately 235 words/page)
Silicon
Whipped this out in a matter of hours for the english teacher well written
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, silicon is the purist industrial
substance that man produces, with impurities comprising less than one part in
a billion. …showed first 75 words of 1501 total…
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…showed last 75 words of 1501 total…is deposited over the
entire surface. The metal dips down into the circuit contact areas,
touching the silicon. Most of the surface metal is then etched away,
leaving an interconnection pattern between the circuit elements. The final
layer is 'vapox', or vapour-deposited-oxide, a glass-like material that
protects the IC from contamination and damage. It, too, is etched away,
but only above the 'bonding pads', the square aluminum areas to which wires
will later be attached.
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