Unlike other areas of advancing technology, PCB manufacturing isn’t very “sexy.” It doesn’t begin to compare with the innovation-per-minute, adrenaline pumping pace that semiconductor companies keep. PCB processes are fairly static. Outside of incremental advances in chemistry, photolithography or the advent of things like laser drilling, we pretty much rely on well-founded, albeit old, technology. What progress we have made, has enabled us to barely keep-up with the driving forces of miniaturization and speed. PCB technology has not enjoyed any fundamental, game-changing innovation for decades. In other words, we have risen to meet industry demands by improving the existing subtractive (print-and-etch) processes that is unfortunately fraught with inherent limitations—especially for high performance boards.
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