The basic idea of constant-field scaling of CMOS transistors' physical feature and their corresponding band diagram
are shown in Figure 2.For the original device as depicted in
Figure 2(a),the channel have length of L, oxide thickness of
tox, bias voltage of V and substrated oping of Na. While the
scaled device in Figure 2(b), all parameters are affected by
the scaling factor, s~0.7 [11]. The channel length is reduced
to be Lxs, oxide thickness becomes toxxs, bias voltage is
decreased to be Vxs, and substrate doping is increased to
be Na/s