Failed on autorouting?

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1

Dear Kicad Member,

I got failed on autorouting, how can I fix it or optimize it ?
I have used 8 layers and 0.2 track width, could it be my clearance ?
I show you the capture,

Thanks

1150×716 56.7 KB

2

It appears your attempting to do BGA escape routing on only 2 layers, this likely is not possible, and it needs additional layers to work in. the autorouter likely has a setting to define the number of layers.

3

Just about no one on the list uses auto routing so you may find help pretty thin here. We really can’t help much on a feature we don’t use for a variety of reasons.

4

That’s ok, thanks for concerning, I will try to find out myself.

5

Previously I can reply directly via email, now I can not, from the transcript I got from smtp, looks like it doesn’t allow me
How can I fix it?

6

You’re using fairly wide traces and wide clearances between them on a device with tightly spaced pins. That may make routing impossible. For test purposes, try narrower traces and tighter spacing, and see if a routing is possible.

(The FreeRoute autorouter isn’t that bad. It will show you where the tight spots are, and then you have to open things up a bit in the tight areas.)