what is standard cell
Standard Cell – A form of ASIC design that employs predefined logic cells and circuit component s to create an ASIC. All mask layers of a standard-cell ASIC are custom for that ASIC, in contrast to a “Gate Array” in which only the metal-layer masks are custom. Standard-cell ASICs usually run faster and use less silicon (and are therefore usually cheaper on a per-part basis) than Gate Arrays. However, because the standard-cell ASIC uses predefined circuit components, its usually easier to design (and therefore requires less time to design) than a full-custom ASIC where every resistor, capacitor, and transistor is custom built.