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nRF52840 Lead Finish of the BGA Balls

John

We are having a very difficult time soldering the nRF52840 to the PCB. Our Operations Department is asking what the lead finish of the BGA balls is. Would be great to get on the phone with you guys to discuss all the things we have tried. You might have some ideas. Thank you!

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    Hi Kaja,

    Thanks for getting back to me. We solder the nRF52840 right here in our facility, so I work with the folks that are trying to resolve this soldering issue. We've tried different stencils and oven profiles but we don't have the process good enough yet. 

    I was wondering, however, if the VSS ball (B7) becomes unsolderd from the PCB, will that cause the internal 1.3V or 1.1V regulators to fail? We are using the on-board buck regulator to generate the core voltage as shown in Figure 212 of the product spec.

    Thank you!

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    Hi Kaja,

    Thanks for getting back to me. We solder the nRF52840 right here in our facility, so I work with the folks that are trying to resolve this soldering issue. We've tried different stencils and oven profiles but we don't have the process good enough yet. 

    I was wondering, however, if the VSS ball (B7) becomes unsolderd from the PCB, will that cause the internal 1.3V or 1.1V regulators to fail? We are using the on-board buck regulator to generate the core voltage as shown in Figure 212 of the product spec.

    Thank you!

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