A D-Cache SRAM cell having a modified design in schematic and layout that
exhibits increased symmetry from the circuit schematic and the physical
cell layout perspectives. That is, the SRAM cell includes two read ports
and minimizes asymmetry by provisioning one read port on a true side and
one on the complement side. Asymmetry is additionally minimized in layout
as cross coupling on both the true and complement sides rises up one
level by providing from the local interconnect level a via connection to
a M1 or metallization level. Moreover, the distance between the local
interconnect (MC) and the gate conductor structure (PC) has been enlarged
and equalized for each of the pFETs in the cross-latched SRAM cell. As a
result, the SRAM cell has been rendered insensitive to overlay (local
interconnect processing too close) by maximizing this MC-PC distance.