μblog: engineering from the trenches

Another long day, here is a picture of my wafer, from MOS fabrication lab, in it’s current state. So far, we have grown a field oxide, opened source and drain windows, done diffusion for source and drain, and then etched the oxide separating them to grow a good gate oxide. It’s not quite pentium4 technology, but it’s still fun to make your own MOSFETS, only once.

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