This lecture covers the backend design flow in semicustom ASIC design, starting from RTL description to physical design data. It explains the process of building chips from IPs and standard cells, emphasizing timing constraints and power planning. The lecture details the steps involved in the backend design flow, such as layout, clock tree generation, and tapeout preparation. It also discusses floorplanning, core area determination, macro placement, power planning, and clock distribution. The importance of macro placement guidelines, congestion maps, global routing, clock tree synthesis, and detail routing is highlighted.