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随着人们对环境污染问题认识的逐步提高,现在越来越多的印制电路板(PCB)制造商在印制电路板的生产过程中采用了免清洗工艺技术。停止使用三氯乙烯清洗电路板有力地减少了有害溶剂对环境的污染,而且实践表明这样做确实可行。然而这样做会带来另外一些麻烦,尽管溶解和焊接过程有良好的控制,会减少残留在PCB板上的焊剂残渣,但检测工程师常常遇到覆盖了一层又硬又脆或松软发粘残留物的PCB板,这无疑会影响到测试结果的可靠性。 为了解决上述新工艺带来的新问题,针床夹具的制造商已做出了改进型探针,而且夹具的基础结构和运动方式也发生了变化。
With the gradual increase of people’s awareness of environmental pollution, more and more PCB manufacturers are adopting no-clean process technology in the production of printed circuit boards. Stopping the trichlorethylene cleaning circuit effectively reduces the environmental impact of harmful solvents, and practice shows that it is possible. However, this poses additional problems, although the dissolution and soldering processes are well controlled and will reduce the amount of flux residue left on the PCB, but inspection engineers often encounter a hard, brittle or soft sticky residue The PCB board, which will undoubtedly affect the reliability of test results. In order to solve the new problems brought by the new process, manufacturers of needle bed clamps have made improved probes and the basic structure and movement of the clamps have also changed.