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印制电路板在垂直连续电镀生产线上镀铜,通过改进电镀槽结构,引入喷流加强溶液交换等措施,能够使用更大的电流密度,大幅度提高产能.由于搅拌强度、电流密度和阴阳极距离等工艺条件发生改变,为了使微通孔电镀铜效果达到最优,对镀液成分配比进行优化实验.通过对镀铜层切片分析,确定光亮剂浓度和电流密度为影响电镀的显著因素.在优化控制条件下,采用的电镀液对厚径比为6.4∶1.0的通孔(d =0.25 mm)镀铜,铜层的均镀能力达到80%以上,具有很好的实用价值.

参考文献

[1] Dixit P;Miao JM .Aspect-ratio-dependent copper electrodeposition technique for very high aspect-ratio through-hole plating[J].Journal of the Electrochemical Society,2006(6):G552-G559.
[2] 林金堵.直流电镀在微孔、盲孔镀中的重大突破[C].2007年上海市电子电镀学术年会论文汇编,2007:89-94.
[3] Chong Wang;Jinqiu Zhang;Peixia Yang .Through-Hole Copper Electroplating Using Nitrotetrazolium Blue Chloride as a Leveler[J].Journal of the Electrochemical Society,2013(3):D85-D88.
[4] Min Tan;John N. Harb .Additive Behavior during Copper Electrodeposition in Solutions Containing Cl~- PEG, and SPS[J].Journal of the Electrochemical Society,2003(6):C420-C425.
[5] Yong-Da Chiu;Wei-Ping Dow .Accelerator Screening by Cyclic Voltammetry for Microvia Filling by Copper Electroplating[J].Journal of the Electrochemical Society,2013(12):D3021-D3027.
[6] Takeshi Kobayashi;Junichi Kawasaki;Kuniaki Mihara;Hideo Honma .Via-filling using electroplating for build-up PCBs[J].Electrochimica Acta,2001(1/2):85-89.
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