nRF54L15-CAAA WLCSP Light Sensitivity and Underfill Requirements

RE: nRF54L15-CAAA WLCSP Light Sensitivity and Underfill Requirements

AntonioFCDS — Thu, 08 May 2025 11:35:10 GMT

Thank you. This is helpful for us to proceed with the build.

RE: nRF54L15-CAAA WLCSP Light Sensitivity and Underfill Requirements

Amanda Hsieh — Tue, 22 Apr 2025 12:39:49 GMT

Sorry for the late reply due to the Easter holidays in Norway.

The statement indicates that the entire chip needs to be properly blocked from any visible or infrared spectrum including edge and bottom.

It says that there is a back side coating that can protect the chip, but the edge and bottom are still exposed.

This is common to all WLCSP chips and often it is suggested to apply glob top covering epoxy or metal shield to block any lights hitting the chip.

RE: nRF54L15-CAAA WLCSP Light Sensitivity and Underfill Requirements

AntonioFCDS — Mon, 21 Apr 2025 17:49:44 GMT

Amanda,
Any update?

RE: nRF54L15-CAAA WLCSP Light Sensitivity and Underfill Requirements

Amanda Hsieh — Wed, 16 Apr 2025 15:55:59 GMT

Hi,

I am waiting for the information update from the internal. Now it's the Easter holiday in Nowray, so it might update next week. Sorry for the inconvenience.

Regards,
Amanda H.