| 摘要 |
Metallized polyimide composites are prepared by depositing an electrolytic layer of metal onto an electrolessly-applied metal layer which is disposed on and chemically bonded to a polyimide substrate, the electrolytic metal layer being deposited from an electrolytic bath containing A. about 50 to about 275 grams per liter of an aqueous acidic metal electrolyte, B. about 30 to about 120 grams per liter of a strong acid, C. about 20 to about 500 parts per million of halide ions, D. about 0.5 to about 6% by volume of at least one organic chemical additive comprising an organic levelling agent, an organic brightener or a mixture of the foregoing. These composites are characterized by improved surface characteristics and improved adhesion between the electroless metal layer and the polyimide surface. |
