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We strongly suggest that you use a plated hole instead - it'll work just fine if you set the diameter to what the length of the slot would have been. We'll try to accommodate as best we can, but no promises. So - if you require holes that you're fitting something else into - through-hole components, mounting hardware - you must have at least an 8 mil annular ring or clearance.Ĭutouts are fine, as long as your outline file shows the shape of the board that you're looking to produce.
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How We Distinguish between Holes and Vias Thus, the smallest hole possible would be 24 mil: However, they require an 8 mil annular ring for plated holes, and 8 mil clearance for unplated holes. Holes may be plated or unplated they're suitable for mechanical purposes, and are drilled to higher tolerance. Our minimum via specs are an 8 mil drill hit, with a 5 mil annular ring, as per this illustration: But it may not be suitable for mechanical purposes, such as inserting components. This will, in no way, affect the functionality of your board. Thus, a via is subject to tolerances such that the size may be slightly off from what you specified. Vias are plated holes that are used solely to connect different layers of a board.
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If you're using it for electrical connectivity, it's a via. In short, if you're using an aperture in your board for mechanical purposes, it's a hole. But hey, we're not going to let you make perfboard, OK? In practice, we try our best not to adhere to this rule. We suggest that if your design has castellated holes, to make the drill hits as large as possible, using a pad size that's as close to our plated hole limits, below, as possible.ĭrill hits amounting to more than 15 per square inch may be considered excessive, and if so, your job may either be delayed or cancelled. Note that depending upon your design, castellated holes may produce unwanted results such as left over burrs and other debris: Minimum Space (between copper features): 4 milĬastellated Holes are not officially supported, but will be produced with best effort only. Minimum Annular Ring, Plated Holes: 8 mil Arrays are not supported.Ĭlearance from board edge, outer layers: 10 milĬlearance from board edge, inner layers: 20 mil Please do not attempt to make arrays - our system considers each order as a single design, and it may not function correctly if you attempt an array.