What is the minimum apreture I can use in the gerbers?
Please don’t use under 8 mils line widths in your Gerbers on the copper layers. Basically you can use any line width size to fill your copper polygones, but practice shows that if the stroke width is under 8 mils and the CAD program doesn’t generate hatch filling simple stroke to stroke filling the quality of the phototools printed is bad. Many CAD programs have 5 mils or 1 mils line width for copper pour set by default so you have to check your settings as we’ll put your order on hold if your copper pour is made with under 8 mils stroke width.