What are the implications of placement density?
How to determine the optimum placement density for a design?
placement density is the amount of space utilised for placement of standardcell,sparecells,endcaps,tapcells,decaps etc(all kind of cells except fillers) out of total available space.
Its better to close a design with 85-90% density beyong which tool actually takes huge time to move a cell or add extra repeater during timing optimizations
We can anticipate the density by choosing the die area 20-35% more than the area which we get as output from synthesis.