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Ken Shirriff
@kenshirriff
Nice tiger chip art on Dallas Semiconductor wafer from 1987. Interesting NPN/PNP transistor test circuit as well as feature widths from 50 μm down to 1 μm. "I'd rather be modeling." The 9256 and 2256 part numbers don't match products; maybe this was a development wafer?
Chip art on a semiconductor wafer. An orange tiger jumping out of a green building.
Test circuitry on an integrated circuit wafer. Square structures for NPN transistors and circular structures for planar PNP transistors.
Text on a silicon chip wafer: "I'd rather be modeling" (C)(M) Dallas Semiconductor 1987
Test circuitry has lines varying from very wide 50 μm line to very narrow spiraled 1μm line.
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