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采用无铬、低污染的MnO2–H2SO4–H2O体系对PC(聚碳酸酯塑料)表面进行微蚀。以微蚀后PC基板的表面形貌、水接触角及其与铜层间的粘结强度为性能指标,研究了膨润液中NMP(N甲基吡咯烷酮)含量及微蚀时间对微蚀效果的影响。用NMP体积分数为80%~85%的膨润液于35°C下对PC处理5min后,再在含30g/LMnO2、12.3mol/LH2SO4的胶体溶液中70°C微蚀时,可得到较理想的微蚀效果,其水接触角可低至33.8°,基板与铜层的粘结强度可高达0.88kN/m。
Micro-etching PC (Polycarbonate plastic) surface with chromium-free, low-pollution MnO2-H2SO4-H2O system. The micro-etching effect of NMP (N-methylpyrrolidone) content and micro-etching time on the surface morphology, water contact angle and the bonding strength between the micro-eroded PC substrate and the copper layer were investigated. Impact. With NMP volume fraction of 80% ~ 85% of the swelling liquid at 35 ° C under the PC treatment 5min, and then with 30g / LMnO2, 12.3mol / LH2SO4 colloidal solution at 70 ° C micro-etching, can be obtained more Ideal micro-etching effect, the water contact angle can be as low as 33.8 °, the bond strength of the substrate and the copper layer can be as high as 0.88kN / m.