What is the composition of the balls used on the STM32H7 BGA packages?

[RWill.8]

..

[Tesla DeLorean]

Good question, the WLCSP are an SnAgCu alloy

Might be different across the BGA's as they have often been out-sourced

@Imen DAHMEN​ Technical Notes seemed a bit lacking, and wider search didn't yield any ST BGA specific notes, or any material safety docs

https://www.st.com/content/st_com/en/products/microcontrollers-microprocessors/stm32-32-bit-arm-cortex-mcus/stm32-high-performance-mcus/stm32h7-series.html#documentation