Each diode is cut from a wafer of crystals layered over a base of silicon or sapphire.
每一个二极管都是从硅或者蓝宝石薄片上切割下来的。
Note that the base of the transistor is not used; the transistor functions as a diode.
我们可以注意到，图中三极管的基极空接，被当做一个二极管使用。
Each diode is cut from a wafer of crystals layered over a base of silicon or sapphire.
每一个二极管都从硅(或者蓝宝石为衬底的)晶片上切割下来。
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