The metrics for measuring integration density used to be metal half-pitch and gate length. For a while they were about the same number. This number became known as the node or process number.

The half-pitch refers to half the minimum center-to-center distance spacing (or pitch) between Metal 1 lines.

By 1990s these numbers became uncoupled, and the 130nm node actually has 70nm gates. By 2000, the node number “had by then absolutely no meaning” (Paolo Gargini. IEEE article by Samuel K. Moore: The node is nonsense.)

It’s still used as a marketing tool, but it doesn’t really mean anything anymore.

The table above shows how the gate length and metal half width measurements have become uncoupled from the node number. The table came from this interesting video about the latest and smallest process sizes.

Finally, this chart shows how even though the 130nm process is quite old, it and larger/older sizes still account for about 50% of all ASICs made by EuroPractice.

Course feedback

I love the layout of the course, you did a perfect job Matt. Building up the foundation and then getting into the depths of it. Having everything lined up. I love the walkthroughs at the end of each section. I did the work and then I looked back, maybe there's a better way and in your videos you point out some other interesting things as well so that was really helpful. So yes I love the course.

Konrad Wilk (digital course)