PCB specification for TMC8670-Eval V1.1:

Width x Height: 79mm x 85mm
Thickness: ~1.55mm
Soldermask color: White (top and bottom)
Silkscreen color: Black (top and bottom)

6 layers, 35µm copper, no special buildup required
0.1mm microvias from layer 1 to layer 2
>0.2mm vias through all layers
Track width >= 0.1mm, spacing >= 0.08mm