I know that in the 80s, there was a shift from aluminum gate material to polycrystalline silicon. I wonder because the 6502 was released in 1975 and there were a lot of different implementations and versions of it in the 80s. Did ICs use aluminum gate material anyway?


According to visual6502.org's page of die images, the chip was produced with "polysilicon" which is apparently an alternative name for polycrystalline silicon.

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