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一、概述普通接插件与印制电路板之间,一般是将接插件上插针插入印制电路板金属化孔中,然后采用焊接的方式来实现电连接。可是焊接方式有虚焊和焊点被助焊剂腐蚀的可能,潜伏着电连接失效的危险,这对于要求高可靠性的航空电子设备来说是个致命的缺点。成批生产的印制电路板与元器件的焊接都采用波峰焊,因而使印制电路板受到强烈的热冲击和化学冲击,降低了机械强度,并极易引起插针焊点间的搭锡短路,引起航空电子设备失效。
First, an overview of common connectors and printed circuit boards, the general is the connector pins into the printed circuit board metal hole, and then use the welding method to achieve the electrical connection. However, there is the possibility of solder joints and solder joints being corroded by the flux, potentially jeopardizing the failure of the electrical connections, which is a fatal disadvantage for avionics requiring high reliability. Mass production of printed circuit boards and components are used in the welding of wave soldering, so that printed circuit boards are subject to strong thermal shock and chemical impact, reducing the mechanical strength, and can easily lead to pin between solder joints take tin Short circuit, causing avionics failure.