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半導體(Semiconductor)係一啲物料,導電率介乎導電體同絶緣體之間,約莫響每厘米10³西 到10⁻⁸個範圍。現代電子儀器,都係用半導體製成,例如收音機、電腦、電話等等。半導體可以製成唔同電子零件,例如電晶體、太陽能電池、唔同類嘅二極管,包括發光二極管,另外重有整流器,數碼或者類比集成電路。
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