Tag Archives: Tag: eco


Engineering Change Order or ECO is how you incorporate last minute changes in your design. ECO saves money and time and is prevalent in the industry. When I talk ECO, I am talking about ECOs in the layout. So typically you start with an ECO on the gate level netlist. The designer need to edit

Spare Cells

I have been writing an article on ECO flows.Of course I cannot talk about freeze_silicon ECOs without talking about spare cells.When I was a wee intern sitting through PnR training, spare cells confused me. I thought I had to insert the spares and use them in the same session! So here’s a small note about