Thursday, 30 May 2019

What is Physical Design?

The physical design is the process of transforming a circuit description into the physical layout, which describes the position of cells and routes for the interconnections between them. At this step, circuit representations of the components (devices and interconnects) of the design are converted into geometric representations of shapes which, when manufactured in the corresponding layers of materials, will ensure the required functioning of the components.


The main steps in the ASIC physical design flow are:

  • Design Netlist (after synthesis)
  • Floorplanning
  • Partitioning
  • Placement
  • Clock-tree Synthesis (CTS)
  • Routing
  • Physical Verification
  • GDS II Generation

Below are main sign off checks/Analysis in Physical Design

  • 1. Logical Equivalence Check
  • 2. Static Timing Analysis
  • 3. Power analysis (static and dynamic,  resistance checks etc)
  • 4. Low power Checks

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