Getting a trace out of a dense pad field (QFN/BGA) into open board area. Often the hardest part of a route; routers handle it with short "escape stubs" before normal pathfinding.
How it looks
Real geometry: CORE3588 copper, drawn from our board file (2D plan view)
Top copper around J1, one of the two 100-pin connectors the compute module plugs into (14 x 12 mm). Amber: signal wires leaving the pad field (power and ground left grey). The light bars are the connector's pads, 0.4 mm apart. This is the densest spot on CORE3588.
1A wire leaves its pad and runs down the narrow lane between the two pad rows to reach a via.
2A camera pair drops through two vias, escaping on the bottom layer instead.
3On the right, wires fan out to a row of vias as soon as they clear the pads; this one already carries a length-matching bump.
Real image: CORE3588, rendered by KiCad from our board file
The same area, KiCad 3D render. The pin rows of the connector are the white comb; the tracks fan out from them.
How it works
Where it fits
Escape routing is the first step of routing a BGA or fine-pitch QFN; the autorouter handles it with short stubs before normal pathfinding.
On CORE3588 the hard escapes are the four 100-pin module connectors (J1 to J4).