[The Exiled]

So what was the problem with 7nm?

While Intel did not explicitly say what was wrong, they did say that the fix required them to re-design a significant number of steps in the process flow to fix the problem. This clearly means that it was not one step or tool or material or even a design. Intel obviously drove down a dead end from which there was no escape. It meant that they had to back up quite a bit and start over which obviously accounted for the extra time. Backing that far up means literally going back to the drawing board (EDA tools) and re laying out all the designs and layers. It means a new set of masks, new and additional tools. It can get ugly and out of control quickly. As with plane crashes its never just one thing that went wrong nor has to be fixed.

Izvor: SemiWiki.com