Since the supply voltage, Vnn, has not been scaling as
fast as channel length, L, the power density has in fact been
growing[15]. There are two types of power density dissipate
by per unit area of integrated circuit (IC) chips namely
dynamic power density and static power density [18]. Dynamic
power density is dissipated when transistor is switched on.
While static power density dissipation originates from the
leakage source-drain current when transistor is switched off.
Figure 4 depicts both dynamic power density and static
power density based on measured in dustrial data as mentioned
in [15], at junction temperature of Tj =25°e. The former