This section describes the information that a professional fabrication house needs to know about your design in order to produce boards from your design. This chapter contains all the “real world” information you need to get it done right. You’ll also find this information useful even if you are making your own boards by hand.
One of the first things a fabrication house will ask you when you contact them about fabricating your board is what the board design parameters are. As a minimum, what they want to know is:
1) The minimum width of the traces you have used.
2) The size of your smallest via.
3) The minimum spacing between the traces you have used.