Geometry Sharing Placement

The ability to arrange devices such that critical structures are shared between several devices is the layout designer’s most powerful tool for the reduction of layout induced parasitics and the improvement of layout density. This chapter introduces unique features which allow us to optimize dynamically such geometry sharing during placement1. These features have been added as a functional layer on top of the topologically-constrained placement function described in Chapters 2.0 and 3.0.