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Manufacturing Plots

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3 Kommentare

  • Boss .

    It should be easy for them to see what you have provided, but as far as I know DSPCB produces all positive images (dark is copper) for Gerber files.

    I'm not sure that DSPCB offers anything else in the Gerber options (PDF allows positive or negative to suite your photo sensitive resist).

    Check in a Gerber viewer in case you have discovered a different option.

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  • J R

    For the Powerplane layers, for this conversation lets discuss layer 3 which is ground plane in my application, DSPCB produces two .gbr files for that layer "GND Plane(Powerplane).gbr" and "GND Plane(Powerplane Positive).gbr" neither of which looks like the layer when analyzed in a viewer.  

    Let me ask, when you generate the manufacturing plots for a board with power plane are the files generated as I describe or is there some setup option gone haywire?

     Thanks, JR

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  • J R

    Looking at this closer, in my opinion, I believe the DSPCB generates two Gerbers for power planes, powerplane positive and powerplane. It looks like the powerplane.gbr represents where to remove copper and powerplane positive.gbr represents where to place copper.

    When viewing powerplane.gbr, any dark area denotes area without copper, white area denotes area with copper.

    When viewing powerplane positive.gbr any dark area denotes area with copper, white area denotes area without copper.

    To represent the power plane layer, the two .gbr files must be combined as follows -  !powerplane.gbr + powerplane positive.gbr

    Refer to the attached pictures showing the a power plane with a few traces placed on it. The actual copper traces are the thin lines on the first image, the thick lines, on second image,  is where the copper is removed allowing path for the trace. So on the second image everything appearing white is actually copper.

    Powerplane Positive:

    Powerplane:

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