基本上,锡镀层的厚度决定了零部件的寿命。因此,IPC-4554旨在规定标准锡厚度,制造商可以采用该厚度来实现所有表面安装和通孔组装应用的可靠可焊接表面处理。遵守该规范将确保满足J-STD-003第三类耐用性的部件具有6个月的保质期。 浸锡分析的实践考量 如上所述,铜扩散至上部锡层的趋势对可焊性和保质期...
IPC-4554 January 1, 2007 Specification for Immersion Tin Plating for Printed Circuit Boards This specification sets the requirements for the use of Immersion Tin (ISn) as a surface finish for printed circuit boards. It is intended for use by supplier, manufacturer, contract manufacturer... ...
Instances where your XRF measurements might be wrong Advice on how to set up your XRF equipment to get the right reading every time The four types of surface finish covered are: IPC-4552A ENIG IPC-4553A Immersion Silver IPC-4554 Immersion Tin ...