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精密五金蚀刻过程中应注意的问题

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精密五金蚀刻过程中应注意的问题

发布日期:2017-06-29 09:28 来源:http://szaxzb.com 点击:

  精密五金蚀刻过程中应注意的问题

  精密五金蚀刻介绍首先减少侧蚀和突沿,提高蚀刻系数

  侧蚀产生突沿。通常印制板在蚀刻液中的时间越长,(或者使用老式的左右摇摆蚀刻机)侧蚀越严重。侧蚀严重影响印制导线的精度,严重侧蚀将使制作精细导线成为不可能。当侧蚀和突沿降低时,蚀刻系数就升高,高的蚀刻系数表示有保持细导线的能力,使蚀刻后的导线接近原图尺寸。电镀蚀刻抗蚀剂无论是锡-铅合金,锡,锡-镍合金或镍,突沿过度都会造成导线短路。因为突沿容易断裂下来,在导线的两点之间形成电的桥接。精密五金蚀刻

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