We discuss a method of improving adhesion to fluorocarbon resin by irradiation with an XeCl excimer laser. The adhesive force between the polymer and metal, and contact angles with water as measured by the shear test method and a Ne-He laser system, respectively, are improved when the polymer surface is irradiated in the presence of water or solutions of boric acid, sodium hydroxide, copper sulfate, and sodium aluminate. The results are interpreted in terms of a simple laser heating model.