PCB design output

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PCB design output

The PCB design can be output to a printer or output illuminating file. The printer can print the PCB layer by layer, which is convenient for designers and reviewers to check; the lithography file is handed over to the board manufacturer to produce the printed board. The output of the light painting file is very important, which is related to the success or failure of this design. The following will focus on the precautions for outputting the light painting file.

a. The layers that need to be output are wiring layers (including top layer, bottom layer, intermediate wiring layer), power layer (including VCC layer and GND layer), silk screen layer (including top screen printing, bottom screen printing), solder mask (including top solder mask) And underlying solder mask), in addition to generate drilling files (NC Drill)

b. If the power layer is set to Split/Mixed, select Routing in the Document item of the Add Document window, and use the Pour Manager's Plane Connect to laminate the PCB before each output of the illuminating file; if set to CAM Plane, choose Plane. When setting the Layer item, add Layer25 and select Pads and Vias in the Layer 25 layer.

c. In the Device Settings window (press Device Setup), change the value of Aperture to 199.

d. Select the Board Outline when setting the Layer for each layer.

e. When setting the layer of the silkscreen layer, do not select Part Type, select the top (bottom) and silkscreen layers of Outline, Text, Line

f. When setting the layer of the solder mask, selecting the via hole means that no solder mask is added on the via hole, and the via hole is not selected to indicate the home solder mask, which is determined according to the specific situation.

g. When generating the drilling file, use the default settings of PowerPCB, do not make any changes.

h. After all the lithography files are output, open and print with CAM350, and the designer and reviewer will check according to the “PCB checklist”.