Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss
metal work functions
10 views
Skip to first unread message
Tuen
Dec 13, 2008, 6:38:42 PM12/13/08
to
Drawing a MOS band diagram involving:
Aluminum gate with p-type Si bulk, and
n+ Si gate with p-type Si bulk
turn out to resemble each other in terms of band bending.
I know that this is because both Al and n+ have lower work functions than
the p-type Si, but why would both Al and n+ would have a lower work
function? Al is located to the left of Si in the periodic table, but n+ Si
is basically Si doped with group 5 material, which makes it partially
composed of a material to the right of Si in the periodic table. I.e., what
property of the material makes it so that its work function is lower (i.e.
easier to remove an electron from its Fermi level?)
Aluminum gate with p-type Si bulk, and
n+ Si gate with p-type Si bulk
turn out to resemble each other in terms of band bending.
I know that this is because both Al and n+ have lower work functions than
the p-type Si, but why would both Al and n+ would have a lower work
function? Al is located to the left of Si in the periodic table, but n+ Si
is basically Si doped with group 5 material, which makes it partially
composed of a material to the right of Si in the periodic table. I.e., what
property of the material makes it so that its work function is lower (i.e.
easier to remove an electron from its Fermi level?)
0 new messages