We have been advised by our PCB blank manufacturer that they woullike us to increase the width of copper slivers on some of our internal plane layers.
I tried to use FAB-3000 to detect the copper slivers in our design but could not get FAB 3000 to trigger any violations, even if the threshold is set very high. I followed the following process:
* Import single gerber layer file into workspace
*Create new DFM rule set with only "copper sliver" ticked, and value set to 0.5mm
*Run DFM Check
*Warning about no drill layers dismissed
*Search Area: Entire Board
* Success! No DFM/DRC Violations detected.
However I would expect a large number violations since this layer has slivers of <0.1mm whilst the rule value is set at 0.5mm.
Is the a known issue with the copper sliver DFM check?
Sounds like there's a step missing. To detect copper slivers in gerber files you'll need to first have a netlist extracted.
If possible please submit a support ticket and provide any sample workspace file (*.wrk). Let us know any region of concern and we'll be happy to review it in detail.
Thanks again, and I look forward to hearing from you.
I tried extracting the netlist and this didn't change the behaviour. I have seperately submitted a support ticket with an example workspace (Ticket no 31298).