Transcript Slide 1

Trace?
• Why?
– This is really helpful. It is the first thing I look
at the next time I teach the course.
– It will help students in the future (and maybe
even you, if you take the MEMS course)!
• What do I want to know?
– Everything, but especially what I should keep
doing and what I should stop doing. Also
what material you would like more or less of.
Incentive!!
• The on-line system has significantly
decreased student participation.
• You will get a class participation bonus of
1% when I receive a screenshot of the
receipt that you get when you finish the
survey. You can turn this in on line in
blackboard.
• I think it is important to have a relatively
complete cross section of opinions on the
class.
Voltage inside the npn structure
n
(C)
+
-
+
-
+
-
p
(B)
-
+
-
+
-
+
n+
(E)
V(x)
iB
vC
~0.7 volts
(for Si)
-iC
-iE>>iB
CBJ=off
EBJ=on
If the base region is very thin, the electrons
injected by the emitter are collected by the
positive voltage applied at vC
iC  iE>>iB
(active region)
x
(text)
pE0/nB0=
0.99999994
300
τp
τn
Lp
Ln
(Equation 2.111)