The baseregion is always very much narrower than the emitter or collector regions .
基极总是比发射极和集电极薄得多。
2
A trench is also provided, which extends through the semiconductor layer and into the baseregion.
还设置延伸通过半导体层并进入基区中的沟槽。
3
In the design of blocking voltage capability, the simplified formulas for the baseregion thickness and for the choice of doping concentrations are proposed.