CMOS – Complementary Metal-Oxide-Semiconductor. This is a fabrication technology for transistors used in the construction of integrated circuit (IC) chips, such as microcontroller, microprocessors, DRAM and NAND memory chips, and other typs of digital logic circuits. It is based on Metal Oxide Semiconductor Field Effect Transistors (MOSFETs)which have symmetrical and complementary pairs of p-type and n-type MOSFETs.