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Image 1/1: The RCA CDP1802 was a bit of an unusual chip for its day. A version of the 1802 was [link|http://en.wikipedia.org/wiki/Silicon_on_Sapphire|manufactured] by depositing a thin film of silicon on a sapphire wafer. The extremely low electrical conductivity of the sapphire wafer prevented any stray electrical current, caused by radiation bombardment, from spreading to (and possibly damaging) nearby transistors on the chip. #rcastudio #gaming #gamer #retrogaming #retrogamer