The concept of 'More Moore" refers to the continued scaling
of horizontal and vertical physical feature sizes of siliconbased
complementary metal oxide semiconductor (CMOS)
transistors [1]. This tremendous effort has been the main
impetus in producing today's sophisticated technologies of
electronics devices. The scaling theory that proposed by Dennard
et al. in 1972 is the starting point of this success story [2].
However, semiconductor industry starts to practice this theory
in CMOS transistors a decade later. Since then, more and more
transistors were able to be integrated into single integrated
circuit (IC) chip. In 1965, Gordon E. Moore predicted that
the number of transistors which can be placed in cutting-edge
IC chips is doubling approximately every two years without
correspondingly increasing the cost of the chips