If you were to slice up a microchip and take a look (you’d need a really powerful microscope, I'm afraid) you would see what looks like a nanoscale layer cake.
All the active circuit elements – transistors, memory cells etc. – are on the bottom. The other 90% of the chip is a maze of tiny copper wires, which we call interconnects.
The history of chip development is all about shrinking circuit features. When the transistors shrink, so must the interconnects. Today, the smallest interconnects can be fewer than 200 atoms across.
In this video, I take a quick look at how the interconnect fabrication process is done and then demonstrate how our revolutionary copper reflow technology works.