An electrical junction is a point or area where (a) two or more conductors or (b) different semiconducting regions of differing electrical properties make physical contact. Electrical junctions types include thermoelectricity junctions, metalâÂÂsemiconductor junctions and pâÂÂn junctions. Junctions are either rectifying or non-rectifying. Non-rectifying junctions comprise ohmic contacts, which are characterised by a linear currentâÂÂvoltage () relation. Electronic components employing rectifying junctions include pâÂÂn diodes, Schottky diodes and bipolar junction transistors.