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...

 

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.