Soldering Failed

[Elly Cheung]

Posted on July 17, 2017 at 09:06

I was using STM32F103VET6 (LQFP) for 3 years. At this time, we found some parts' pins were dark and the showed assembly in Philippine. Last lot parts came from Korea which were fine. So we followed AN2639 document to take a test for soldering but they were failed (The same test for Korea assembly parts were passed.) Then we sent to testing lab and Philippine's parts were failed for soldering either. We need some new instruction for settle this case.

I attached 2 photos which are before and after soldering.

[S.Ma]

Posted on July 17, 2017 at 10:49

I guess any quality analysis would require at least a picture of the package marking and a picture of the sticker reel (which would give origin info) for anyone to dig further. 

[Elly Cheung]

Posted on July 19, 2017 at 07:22

Here are the label and marking photos.

[AvaTar]

Posted on July 19, 2017 at 07:37

Perhaps not packed correctly, and some corrosion from moisture ?

IMHO better check with your FAE or sales representative, ST will most probably not tell about production details and issues here ...

[Imen.D]

Posted on July 19, 2017 at 11:26

Hello

Cheung.Elly

,

Please contact your nearest local STMicroelectronics office or your FAE contact

to apply for a quality Failure analysis, to understand what happened with your device.

With Regards

Imen