Patent ID: 7011877

Claim:
A method treating a plastic layer of an optical disc to improve surface adhesion properties, comprising: discharging a gas comprising a plurality of non-reactive gaseous ions at a volumetric rate in the range of about 30 to 50 cubic feet per hour through at least one nozzle so as to direct one or more gaseous streams in a pattern substantially spanning a diameter of the optical disc; moving a first side of a first plastic layer for an optical disc across the at least one nozzle during the discharging step, wherein the optical disc is located so that the one or more gaseous streams reach the optical disc while still comprising the plurality of non-reactive gaseous ions, and the moving step is continued until substantially all of the first side of the plastic layer has been exposed to the one or more gaseous streams; and, removing the first plastic layer from the at least one nozzle after the moving step.