1971, Faggin had spent half a year crouched over his drafting table, sketching the design with Intel’s most advanced tools: a straightedge and color pencils. Then, this design was cut into Rubylith, a red film, using a penknife. A special camera projected the patterns carved in Rubylith onto a mask, a glass plate with a chrome covering that perfectly replicated the Rubylith’s pattern. Finally, light was shined through the mask
