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How Do You Inspect QFN Components?
Jan 22, 2018

How Do You Inspect QFN Components?

         How can you inspect QFN components? What guidelines can you suggest for qualifying an assembly house for QFN assembly on the pcb board ? 

1、The only way to authenticate acceptable wetting is with x-ray

2、 if you can extend the  pcb pads out that can help you, but to know underneath the package you need a good x-ray machine with oblique angle viewing

      Wells have S-XRAY machine to test the QFN chip to make sure the pcba board with QFN qualityX-Ray Test machine.jpg

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