Finally, the resin on the surface of the trace is gradually removed using a buff polishing wheel, resulting in a resin/ Cu co-planar surface equal to the planarity that is typically achievable using additive Cu plating. 最后,用抛光轮慢慢磨掉线路表面的树脂,以获得树脂/Cu的平整表面,这可用于加成法镀铜。