Actually, in all regions there is facilitator or defense ie semiconductor. Semiconductor materials have a decadent electrical conductivity between channels, for example, copper, gold, etc. and guarantees, for example, glass. Their barrier decreases when their temperature is being built, which conducts a metal check. Their lift quality can be adjusted in a helpful way by doping (“doping”) into the structure of gems. Where two distinctive doped zones exist in similar pearls, semiconductor junction is created. Obligations of charge carriers including electrons, particles and electron holes at this convergence are important diodes, transistors and all modern equipment. j j j j j j jjj j j j j j j


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