Do you think a 90° bend in a trace will affect a signal and cause problems? Of the thousands of engineers I've taught, about half admit to harboring this concern. I think I know why. It is absolutely correct that in sensitive analog microwave circuits built on thick Teflon substrates, a 90° bend in a trace can sometimes affect circuit performance. I suspect that a number of early board designers were exploring the design of serpentine delay lines and discovered the huge problem a pair of 90° corners could create. But what is a 90° corner's impact on high-speed digital circuits?
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