Our index of selected Electrical and Electronic Engineering articles. Pages: 1 | 2 | 3 | Next >. From: Circuit World, volume: 37 issue: 3, 2011. High-density interconnect (HDI) continues to be the fastest growing segment of the printed circuit board (PCB) market.
Color Green - Verde!!! Green is the prime color of the world, and that from which its loveliness arises. -- Pedro Calderon de la Barca.
Gold, copper, caesium and osmium are the only four colored metals. Copper is green as copper(II) carbonate and copper(II) hydroxide. It turns green because it oxidises. After a time in the air, copper forms green copper carbonate at the surface, called verdigris.