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Silicon
Beginning of essay
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 prod ....
Middle of essay
....tand more about semiconductors and the silicon chip.
In the early 1900's before integrated circuits and silicon chips were invented,
computers and radios were made with vacuum tubes. The vacuum tube was invented
in 1906 by Dr.Lee DeForest. Throughout the first half of the 20th century,
vacuum tubes were used to conduct, modulate and amplify electrical signals.
They made possible a variety of new products including the radio and the
computer. However vacuum tubes had some inherent problems. T.... |
| Number of words: 1438 |
Approximate pages: 6 |
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