Cutting VUSB to 5V jumper trace too deep?

[strud]

I use teensy 4.1s in a prodct of mine and need to cut the VUSB to 5V jumper.

This has worked fine for a couple of boards so far but the last one I just cut I fear may have damaged something.

How deep can one cut into the surface before the likelyhood of damage?

 

[AJL Electronics]

I use teensy 4.1s in a prodct of mine and need to cut the VUSB to 5V jumper.

This has worked fine for a couple of boards so far but the last one I just cut I fear may have damaged something.

How deep can one cut into the surface before the likelyhood of damage?

1.6mm I would guess unless it is a multilayer PCB.

 

[BriComp]

1.6mm I would guess unless it is a multilayer PCB.

It is.

 

[MarkT]

1.6mm I would guess unless it is a multilayer PCB.

Every board with high pin-count BGA parts is at least 4 layer, though usually 6 or 8 or more - its the only way to route all those pins from the middle out!

 

[strud]

Looking at the board again, the cut made is quite shallow so I suspect something else has gone wrong with this board.