Discrete power MOSFETs employ semiconductor processing techniques that are similar to those of today’s VLSI circuits, although the device geometry, voltage and current levels are significantly different from the design used in VLSI devices. The metal oxide semiconductor field effect transistor (MOSFET) is based on the original field-effect transistor introduced in the 70s. This technical paper introduces the basics of power MOSFETs.

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International Rectifier’s Web site.