What is collector drift region?

Q.  The n_region in a vertical cross-section of a typical n-p-n bipolar power transistor is also known as _________
- Published on 23 Sep 15

a. Emitter drift region
b. Base drift region
c. Collector drift region
d. None of the above

ANSWER: Collector drift region

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    Discussion

  • Satyawati   -Posted on 05 Oct 15
    As far as the doping level in n-p-n bipolar transistor is concerned, the thickness of different layers affect the characteristics of the device. In a typical n-p-n bipolar power transistor,the emitter layer is heavily doped while base layer exhibits moderate level of doping.

    Since the n+ region has the capability of terminating the drift region, it exhibits similar doping level as that of emitter & hence, it acts as a collector contact.

    Therefore, n- region is lightly doped & assists in deciding the breakdown voltage & however, it is also renowned as collector drift region.

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