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58问答库 > PCB 可焊性热冲击热应力的区别与要求？

PCB 可焊性热冲击热应力的区别与要求？

2025-03-15 12:16:24

推荐回答（1个）

回答（1）：

可焊性就是模拟客户过锡炉，测试线路板的可焊锡性温度有铅230-240度无铅 250-260度
要求是上锡面积大于等于97% 。一般无基材，层数而不一样。
热冲击、热应力热冲击和热应力都是同种实验只是称呼不一样。目的是为了测试线路板耐高温程度。温度一般看客户要求，有两种 255-265度 283-293度要求是浸锡10秒三次不出现爆板，基材白点，织纹显露，孔脚崩裂等现象。无基材和层数而不一样。具体实验方法可以参照IPC-TM-650 允收参照IPC-6012

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