All PCB Design tools output their EDA/CAM files differently (i.e Gerber, ODB++, IPC-2581, etc).
For example, some PCB Design tools will output a simple "square pad" as a single Pad (referencing an Aperture shape), while other tools may output the same "square pad" as drawn outlines with hundreds of thin traces used to fill the inner areas. Both methods look the same when viewing the design in a Viewer - but internally the objects are completely different.
The DFM engine must process whatever object types are provided EDA/CAM files, and provide results based on the constraints (DFM Rules) that you have provided.
When viewing your sample screen capture, it appears there many instances of trace widths (on the Signal layers) that are well below minimum width allowed (5 mil / 0.127mm). Those Traces in the DFM Error List have a width of (0.3 mils / 0.0076mm). It's possible those thin copper traces are either:
Too thin to be manufactured or handle electronic signal requirements. DFM Violation
Used as design references or nomenclature (that will probably disappear after etching and/or interfere with neighboring objects) and should not be on the signal layer). DFM Violation
Stacked adjacently to construct a filled area - in this case those Minimum Width Traces. NOT DFM Violation
When viewing the DFM error - if those small traces are stacked adjacently to fill an area then those DFM Errors are incorrect and can be Ignored or Deleted. Right-Click your mouse over any false DFM Errors and select "Delete" to remove them.
The DFM Checker concept is similar to an Anti-Virus Software tool - in that it "highlights" potential Violations (and a person can decide if it's threat or False positive).
Thanks again, and I look forward to any other questions.
All PCB Design tools output their EDA/CAM files differently (i.e Gerber, ODB++, IPC-2581, etc).
For example, some PCB Design tools will output a simple "square pad" as a single Pad (referencing an Aperture shape), while other tools may output the same "square pad" as drawn outlines with hundreds of thin traces used to fill the inner areas. Both methods look the same when viewing the design in a Viewer - but internally the objects are completely different.
The DFM engine must process whatever object types are provided EDA/CAM files, and provide results based on the constraints (DFM Rules) that you have provided.
When viewing your sample screen capture, it appears there many instances of trace widths (on the Signal layers) that are well below minimum width allowed (5 mil / 0.127mm). Those Traces in the DFM Error List have a width of (0.3 mils / 0.0076mm). It's possible those thin copper traces are either:
When viewing the DFM error - if those small traces are stacked adjacently to fill an area then those DFM Errors are incorrect and can be Ignored or Deleted. Right-Click your mouse over any false DFM Errors and select "Delete" to remove them.
The DFM Checker concept is similar to an Anti-Virus Software tool - in that it "highlights" potential Violations (and a person can decide if it's threat or False positive).
Thanks again, and I look forward to any other questions.
Best regards,
Simon
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