soldiring mask layer

[Ahmed]

hello everyone
im using eagle to create PCB , what i understand that the soldering mask layer covering everything but pads no , so how generate it in eagle ?

[ddavidebor]

It's alredy there

[Ahmed]

ya how ? , what name of the layer ?

[kizzap]

tstop and bstop are the solder mask layers, however they are negatives, so they will show what isn't going to be covered by soldermask

[Ahmed]

ya , for printing it i need all board black and just pads white ... can eagle do this step ?

[george graves]

I'd look for a ULP(?) script  - I bet someone has already written one.  If not, you could "print" the layer to a PDF (there are lots of PDF "printer drivers" that let you print to a PDF) and then use a vector art work program to inverse the colors.

[MarkL]

Create a CAM job with just tStop or bStop selected, depending if you want the top or bottom, and choose the PS_INVERTED output device.

[Ahmed]

and how can print the out file on paper

[MarkL]

and how can print the out file on paper

On Linux you can use evince to view and print postscript files, or convert it to PDF with ps2pdf, and view/print with Acrobat reader.  Ghostview/ghostscript will also work, but the user interface is not as nice.

If you're on windows, I have no idea, but I'm sure there are a number of postscript viewers available that you can print from.  Do a search, or maybe someone else can step in here who knows windows.

Shouldn't be too hard, since many printers and print drivers understand postscript natively.

[kizzap]

Easiest way as stated is to export the Cam job with the layer inverted, then open the file with a gerber viewer and print it that way.

-kizzap