Before revision: See Also Photolithography Etching (microfabrication) Design for manufacturability Semiconductor device fabrication References External links URL states rubylith used on 4004 URL URL was used on the Intel 4004.
After revision: See Also Photolithography Etching (microfabrication) Design for manufacturability Semiconductor device fabrication References External links URL states rubylith was used on the Intel 4004.