AVOID 90 DEGREE ANGLE

You’ll hear this time and time again if you talk to engineers and manufacturers, don’t use 90-degree trace angles. Why? When you have a bunch of traces that have a sharp, right angle turn on your board, the outside corner of that 90-degree angle has the likelihood of being etched narrower than your standard trace width. And at its worst, you might get a bunch of 90-degree traces back that aren’t fully etched, resulting in shorts.