Layout of CMOS Circuits
NMOS Transistor
Symbolic layout (stick diagram )
 symbolic way of representing layout
 for planning purposes
Rectangles on different layers are represented by lines ( i.e sticks)
Complete Diagram
we do the actual layout in the layout editor
Stick diagram
Example: CMOS Inverter
one way..
Symbolic layout
Actual Layout
O/P
another way..
M1
Contact
NDiffusion
PDiffusion
D
DPoly
To fit our inverter in area like this
I/P
GND
VDD
EXERCISES:
OAI123
O/P
A
B
C
n
D