VLSI is the abbreviation of Very Large Scale Integration, which refers to an integrated circuit that integrates tens of thousands to millions of transistors on a silicon wafer a few millimeters square and has a line width of less than 1 micron. Since the transistors and wiring are completed at once, the man-hours and costs of producing several to millions of transistors are the same. In mass production, the hardware cost is almost negligible and depends on the design cost.