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How to check the solder joints of BGA package?

Development board
March 2, 2019 by John Romo 379
package? help me, thanks

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opdf postato su April 30, 2019

Use high magnification magnifier to check , it’s the easiest way and you can know the external situration.
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teghh postato su April 30, 2019

Actually the best way is CT. Microfocus X-ray make imaging and processed by computer, the tin surface and bubbles can be seen, finially you can know the internal situation.

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