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[[File:ZX81 ULA.jpg|thumb|Sinclair ZX81 ULA]]
A '''gate array''' is an approach to the design and manufacture of [[application-specific integrated circuit]]s (ASICs) using a [[semiconductor device fabrication|prefabricated]] chip with components that are later interconnected into logic devices (e.g. [[NAND gate|NAND gates]], [[Flip-flop (electronics)|flip-flops]], etc.) according to a custom order by adding metal interconnect layers in the factory. It was popular during upheaval in semiconductor industry in 80s and its usage declined by end of 90s.
Similar technologies have also been employed to design and manufacture analog, analog-digital, and structured arrays, but, in general, these are not called gate arrays.
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