谁能告诉我FPC在电镀工序存在品质异常问题要如何处理及改善?
推荐回答(2个)
不良原因
可焊性差 1.金太厚太薄 1.调整金缸参数,使厚度在0.05-0.15微米
2.沉金後受多次热冲击 2.出货前用酸及DI水清洗
3.最终水洗不乾净 3.更换水洗缸
4.镍缸生产超过6个MTO 4.保持4-5个MTO生产量
镍厚不足 1.PH值太低 1.升高PH值
2.温度太低 2.升高温度
3.拖缸板不足够 3.用0.5dm2/L光板拖缸20-30分钟
4.镍缸生产超过6个MTO 4.更换镍缸
金厚不足 1.镍层酃含量高 1.提高镍缸活性
2.金缸温度太低 2.升高温度
3.金缸PH太高 3.降低PH值
4.开新缸时起始剂不足够 4.适当加入起始剂
镍/铜结合力差 1.前处理效果差 1.检查微蚀量及更换除油缸
2.一次加入的镍成分太高 2.用0.5dm2/L光板拖缸20-30分钟
金/镍结合力差 1.金层腐蚀 1.升高金缸PH值
2.金,镍缸之间的水洗PH大於8 2.检查水的质量
3.镍面钝化 3.控制镀镍後沉金前的打气及停留时间
渗镀 1.蚀刻後残铜 1.反馈前工序解决
2.在活化缸後镍缸前水洗不足够 2.通过延时或加大空气搅拌增强水洗效果
3.活化剂温度过高 3.降低温度到控制范围
4.PD浓度太高 4.降低农度到控制范围
5.活化时间过长 5.降低活化时间
6.镍缸活性太强 6.适当使用稳定剂
漏镀 1.活化时间不足 1.提高活化时间
2.镍缸活性不足 2.使用校正液,提高镍缸活性
表面腐蚀 1.金缸值低 1.提高值
2.镍层酃分布不规则,引起沉金时电位的不足 2.改善镍缸,避免搅拌
生产故障
可能原因
纠正方法
镀层烧焦
1) 铜含量过低
2) 阴极电流过大
3) 液温太低
4) 搅拌差
5) 光亮剂失调
6) 阳极过长或过多
1) 补充硫酸铜到规定量
2) 稀释镀液,使酸含量到规定值
3) 适当降低电流密度
4) 适当提高液温
5)如用空气搅拌,增加空气流量,如用阴极移动,应
保持在15-20次/分
6)赫尔槽实验来确定
7)阳极比阴极短7-8cm,使阳极面积/阴极面积为2:1
镀层粗糙
1 镀液添加剂失调
2) 镀液太脏
3) CI-含量太少
4) 电流过大
5)有机物分解过多
1) 赫尔槽实验确定其添加量
2) 连续过滤镀液
3) 通过分析调整CI-量
4) 调整到适当值
5) 活性炭处理
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