A method and apparatus for scaling an embedded DRAM array from a first
process to a second process, wherein the scaling involves reducing the
linear dimensions of features by a constant scale factor. From the first
process to the second process, DRAM cell capacitor layout area is reduced
by the square of the scale factor, while cell capacitance is reduced by
the scale factor. The voltage used to supply the logic transistors is
scaled down from the first process to the second process. However, the
voltage used to supply the sense amplifiers remains constant in both
processes. Thus, in an embedded DRAM array of the second process, sense
amplifiers are supplied by a greater voltage than the logic transistors.
This allows the sensing voltage of DRAM cells to be maintained from one
process generation to another, while allowing memory size to scale with
the square of the process scale factor.