Understanding The Through-Hole Density Barrier

摘要

I imagine many of you are wondering, "What is the through-hole density barrier?" If you look at Figure 1, you see a fundamental "CELL" for a printed circuit board. The element of this "CELL" is a single square inch of a printed circuit board's surface. That surface "CELL" is made up of three common design elements:rn1.A SMT mounting landrn2.An interconnecting viarn3.A trace connecting the via to the SMT land.