Propeller Head Plaza

Technical and scientific discussion of amps, cables and other topics.

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RE: diodes ratings and noise

Posted by pictureguy on November 22, 2016 at 23:40:48:
When fabricating a SS device, you can make some films thicker or thinner as need arises. When doing so, you MIGHT have to make some other adjustments to the process, though in most cases the steps will be the same with minor changes. A recipe in a machine MIGHT be altered only for time, for example, to yield different film thicknesses for different voltages.

For example, devices which will work in very LOW voltage circuits may have very thin oxide (an insulator) for the GATE. But this is NOT the working voltage of a power device which may be designed to pass 100 volts and perhaps more, like in the case of soem REAL high power stuff.

The above is VASTLY oversimplified but gives you the idea. The takeaway is that a manufacturer will have a process which can be 'tilted' to yield a variety of different devices of the same type. A seperate but RELATED set of process flows will be used (and different start material) for 'N' Channel or 'P' Channel product.