PCB Design Tips: How to Avoid Damaged Traces and Pads

PCB Design Tips:

All machining operations have finite errors, and milling in PCB production is no exception. JLCPCB’s regular milling tolerance is ±0.2 mm, with a precision ±0.1 mm option available. Due to these errors, it’s necessary to leave at least a 0.3 mm safety margin between any copper and a milled edge. Insufficient clearance can lead to damaged traces and pads, resulting in defective boards.

Problem and Solution

A milled slot on the board (purple) is placed too close to a nearby trace and cuts through the trace and a pad as a result.

Design Requirements Webpage

An illustrated guide is available in the “Board Outlines” section on the PCB Capabilities page:

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