I have been in the business of working for companies that make computer chips for more than 25 years.
Making a chip is a combination of the old darkroom enlargers and painting a car. You take a flat piece of silicon, which is pure glass, put photo resist chemical on, shoot light through a negative. The reaction to the light makes the chemical react, you wash that off leaving a mask on the silicon, like masking a car. You then spray on a layer of molecules, like painting a car. This process is repeated until you have the appropriate layers of molecules on to make a computer chip. There can be several hundred chips on one wafer, the chips are then tested, and cut off to make individuals. The chips are graded, with the best ones being the faster chips, a lot like sorting gravel by size.
The new wafers are 18 inches in diameter and built with an accuracy of 15 nano meters, when I started they were 4 inches in diameter and 10 micro meters.
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Today's Featured Article - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
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