As much as we are mesmerized by the paradigm-breaking, over-the-top, deal-breaking new thing, more often than not it's the low-key evolution of tried-and-true technologies that are truly amazing. Examples abound. When HDI technology was first bandied about, it seemed the deal-breaker. Yes, we all intuitively knew that advanced technology was demanding more functionality in less real estate, but still, holes that small - and all that went with them! Not many years later, just about every printed circuit board sports some aspect of HDI. Lines and spaces of once unthinkable size are now common. Miniature vias are being drilled using conventional mechanical drilling equipment, as well as with lasers. Plating technology has evolved to a much more refined level, as has the advent of conductive and nonconductive filled vias, etc. The once unthinkable is now built with tried-and-true equipment and processes, albeit significantly tweaked, once thought to be inconceivable for producing such advanced technology.
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