TECHGuru

  Copper foil is a sheet of copper that is usually only a few micrometer in thickness. Copper foils are commonly used as a conductor in printed circuit boards (PCBs) and flexible connectors. Copper has high electric conductivity and is also ductile and malleable. This makes it one of the widely used metals in the emerging electric & electronics industry. This, in turn, is expected to drive the   copper foils market   in the next few years with a lot of demand estimated from Asia Pacific. There are two widely available forms of copper foils: electrolytically deposited (ED) copper and rolled annealed (RA) copper. ED copper foils are produced by electroplating the copper from a solution, which develops a columnar-grain structure in the metal. In ED copper foils, grains grow perpendicular to the foil. RA copper films are formed through the mechanical operation of applying the rolling pressure on heated, pure-copper ingots. In RA copper foils, grains grow parallel to the f...