Editing Place and route (section)

== History ==
The final layout of early ICs and PCBs was stored as a [[tape-out]] of [[Rubylith]] on [[transparency (projection) | transparent film]].

Gradually, [[electronic design automation]] automated more and more of the place-and-route work. At first, it merely sped up the process of making many small edits without spending a lot of time peeling up and sticking down the tape. Later [[design rule checking]] sped up the process of checking for the most common sorts of errors. Later auto routers speed up the process of routing.

Some people hope that further improvements in autoplacers and autorouters will eventually produce good layouts without any human manual intervention. Further automation leads to the idea of a [[silicon compiler]].