Editing MOSFET (section)

=== NMOS logic ===
For devices of equal current driving capability, n-channel MOSFETs can be made smaller than p-channel MOSFETs, due to p-channel charge carriers ([[electron hole|holes]]) having lower [[electron mobility|mobility]] than do n-channel charge carriers ([[electrons]]), and producing only one type of MOSFET on a silicon substrate is cheaper and technically simpler. These were the driving principles in the design of [[NMOS logic]] which uses n-channel MOSFETs exclusively. However, neglecting [[leakage current]], unlike CMOS logic, NMOS logic consumes power even when no switching is taking place. With advances in technology, CMOS logic displaced NMOS logic in the mid-1980s to become the preferred process for digital chips.