An interactive script was used for insertion of DECAPs based
on available empty space, and the placementwas always assured
to be DRC/LVS clean. The width of DECAPs used in standard
cell blocks matched the width of the standard cells. The
channel DECAPs were similar to DECAPs used in standard cell
blocks, except that they had M4 and below embedded into the
leaf DECAP cell to reduce data base size. About 700 nF of explicit
DECAP was added on chip (this does not include implicit
DECAP due to the metal power grid and the quiet cap).