Before revision: In February 2015, it was discovered that a WL-CSP chip in the Raspberry Pi 2 had issues with xenon flashes (or any other bright flashes of longwave light), inducing the photoelectric effect within the chip.By Leon Spencer, ZDNet.
After revision: Fan.out packages are used in cases where fan-in packages are not able to provide enough connections at a specified URLIn February 2015, it was discovered that a WL-CSP chip in the Raspberry Pi 2 had issues with xenon flashes (or any other bright flashes of longwave light), inducing the photoelectric effect within the chip.By Leon Spencer, ZDNet.