Heat Sink or Heatsink is a device that aids in the removal of heat from electronic equipment, and is particularly important when heat is generated in a small area on printed circuit boards, or when devices such as power transistors, rectifiers and microprocessors are operated. Heat sinks may be added to components, or to complete assemblies. Typically they are made of metal with high thermal conductivity, and the removal of heat may be assisted by built-in fans as well as depending on natural or forced convection. Heatsink technology can be designed into rigid board, flex PCB and rigid-flex board.
