Why Does Shrinking MOS Device Dimensions Increase Electric Field?

[wuzhenyu]

Why does electric field in MOS device tend to increase as device dimension
shrink

describe the cross-section of a MOSFET with short channel showing the charge
sharing phenomenon

can anyone help me to find out these two problems?
I could not find them out from the book

thanks a lot!

 

[deakie]

Solid state electronic devices
prentice hall
ben g streetman

has a proper treatment of the short channel effects and what happens when the channels are reduced.

basically, both issues are interlinked and is a bit long winded for here...