Reflow interval of aQFN package (52840)

[WrightLin.Avnet]

Hi Great Nordic Support Team: 

Our clients are developing Pick to Light System with 52840.
And they'd like to know why the reflow time is such long (60s-90s),it's described in nAn-40:

  

I believe it is must already well tested by Nordic lab or factory to confirm the reliability,
but is there any other particularly reason to suggest our client about such a long time setting? 

 Wright

[Andreas]

Hi,

 

This is the general recommendation from our partner doing the packaging to ensure good overall reliability for all products. If you believe it is longer than necessary for your project then you are welcome to work with the EMS and experiment with shorter intervals.

 

Best regards,

Andreas