Is the WLCSP package of nRF54L15-CAAA a glass package?

RE: Is the WLCSP package of nRF54L15-CAAA a glass package?

JONATHAN LL — Mon, 08 Dec 2025 13:13:58 GMT

The nRF54L15 also uses the coating.
Ref: https://docs.nordicsemi.com/bundle/ps_nrf54L15/page/chapters/recommended_op_conditions.moonlight/doc/recommended_op_conditions.html#ariaid-title3

"All CSP package variants have a backside coating, where the marking side of the device is covered with a light absorbing film, while the side edges and the ball side of the device are still exposed and need to be protected."

Regards,
Jonathan

RE: Is the WLCSP package of nRF54L15-CAAA a glass package?

Xingbo Xu — Thu, 04 Dec 2025 03:08:28 GMT

Hi，

OK，thank you for your time.

RE: Is the WLCSP package of nRF54L15-CAAA a glass package?

SwRa — Wed, 03 Dec 2025 13:24:50 GMT

Hello,

I will check this with experts and get back to you.

Regards,

Swathy

RE: Is the WLCSP package of nRF54L15-CAAA a glass package?

steamtannen — Wed, 03 Dec 2025 03:49:55 GMT

From what I know, the nRF54L15 WLCSP(Snow Rider 2) doesn’t use the same black film layer that the nRF52832-CIAA had, but to be sure, it’s best if Nordic can confirm whether the surface structure is identical. Since we had issues with the 52832 film peeling and causing light-induced leakage, we’d like detailed info on the 54L15 die surface to verify this. Could you help confirm?

RE: Is the WLCSP package of nRF54L15-CAAA a glass package?

Xingbo Xu — Wed, 03 Dec 2025 03:33:42 GMT

Hello，

I still want to have a detailed understanding. Could you please help confirm whether the wlcsp package of nRF54L15-CAAA-R is the same as that of the nRF52832-CIAA-R? Because the nRF52832-CIAA had a layer of black film, and during the production and soldering process, there was a case of the film peeling off, resulting in light transmission and leakage current.

RE: Is the WLCSP package of nRF54L15-CAAA a glass package?

SwRa — Tue, 02 Dec 2025 12:57:17 GMT

Hello,

The WLCSP packages are bare die packages, so there is no packaging material on the chip.

Regards,

Swathy