Method for metallizing plastic by pre-plating for electroplating

A method for metallizing plastic by pre-plating for electroplating, comprising:

• 1) cleaning a plastic workpiece by an ion source;
• 2) forming a metal bonding layer on a surface of the plastic workpiece using electro arc ion plating or magnetron sputtering;
• 3) forming a metal transition layer on a surface of the metal bonding layer using the electro arc ion plating or the magnetron sputtering;
• and
• 4) forming a metal conductive layer on the metal transition layer using the electro arc ion plating, wherein:
• in the steps 2)-4), at least step 4) comprises:
• disposing a magnetic filter device between a metal target and a vacuum chamber in which the plastic workpiece is placed, so that positively charged metal ions generated by the metal target are deflected by the magnetic filter device and then enter the vacuum chamber to be deposited on the surface of the plastic workpiece.