Semiconductor type question...

Thread Starter

goodbyegti

Joined Apr 28, 2004
59
Hi peoples, i've had a read of this:

http://ece-www.colorado.edu/~bart/book/

which i noticed someone posted when i did a search but can't find the answer to my question..

In a n-MOSFET you've got the p type substrate and the two n+ type semiconductor regions at the source and drain.

Basically why are they n+ and not n type?

Is is because electrons migrate out of the source and drain into the p type substrate?

;) im confused..

many thanks for any help...
 

Thread Starter

goodbyegti

Joined Apr 28, 2004
59
i have been enlightened.... n+ region is just a heavily doped n type semiconductor region

..at least i think this is correct..
 
Originally posted by goodbyegti@Nov 22 2004, 02:27 PM
i have been enlightened.... n+ region is just a heavily doped n type semiconductor region

..at least i think this is correct..
[post=3721]Quoted post[/post]​
Yes, you are right. n+ region will give you the maximum electric potential, which is about 550mV if I'm not mistaken.
 
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