[sdiy] 45 vs. 90 degree pcb traces

[Richie Burnett]

The 45 degree corners really do matter for high-frequency RF and high-speed digital boards. But, I often use 45 degree corners on normal low frequency boards for other reasons:

1. The track length is shorter if you can "cut the corner", and that reduces resistance, without needing to go to a thicker track or higher copper weight. 

2. Taking a more direct route with two 45 degree bends rather than a single 90 degree bend also minimises enclosed area, and therefore reduces stray inductance.

3. Sometimes using 45 degree bends just helps get signals out of the way and make space for other traces or components. Using only 90 degree bends would be quite wasteful of PCB area when routing things like buses!

-Richie,

Sent from my Xperia SP on O2

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