Idea for a semi-autorouter routine

[pointhi]

For any post about autorouter implementation, I will suggest to read my literature research:

Tensorflow based autorouter

I researched the topic a bit and also concluded that interactive auto-routing tools should be the most useful ones for practice. There is a nice article about that topic: https://www.electronicdesign.com/what-s-difference-between/what-s-difference-pcb-routing-then-and-now Some example how the Sketch Router works for example: [PCB Sketch Router (Mentor Graphics)] I did some literature research, and it seems there are two main domains where active research in this direction is don…

From what I know, the most useful “autorouter” which could be implemented should be:

• bus routing (multiple tracks at once)
• single-track autorouting
• escape routing (given a BGA chip, escape a certain netclass / all pads. Advanced escape router can match the escape routing from two chips, so the track order matches each other (and there are no crosses))
• length-matched routing (given two escaped busses, connect them so that everything is correctly length-matched)

In my optinion, each of them should give a producitivity boost. Instead of full-blown autorouting they are aimed to do a specific thing really good, which should make them useful. Especially escape routing and length-matched routing should be important for the future, with the every growing complexity of KiCad boards designed.