Definition
BGA, or Ball Grid Array, is the surface-mount package format used for the hashing ASICs and many support chips on modern Antminer, Whatsminer, and Avalon hashboards. Instead of leads sticking out from the sides of the chip, a BGA package presents a grid of tiny solder balls on its underside. When the board is manufactured, these balls reflow and collapse onto matching copper pads, creating dozens to hundreds of electrical and mechanical connections hidden directly beneath the die.
Why ASIC vendors use BGA
High-pin-count mining ASICs need a dense, short-path connection to the PCB for power delivery and high-speed signalling. BGA delivers that density in a compact footprint and improves thermal transfer into the board. The trade-off is that every joint is invisible and inaccessible once the chip is placed, so faults cannot be probed or resoldered the way a leaded package can.
Repair implications
Because the connections sit under the chip, a cracked or voided BGA joint, a common consequence of repeated thermal cycling, can only be addressed by removing and replacing or reseating the chip with a hot-air or infrared rework station. This is why most chip-level hashboard faults trace back to the BGA interface rather than the silicon itself, and why proper reflow profiling is essential.
BGA is the foundation for several related repair operations. See Reflow for the controlled heating process used to reseat or remove a BGA chip, and Reballing for restoring fresh solder balls to a donor or reclaimed chip before it is placed back on the board.
Pair this with the diode & voltage reference.
In Simple Terms
BGA, or Ball Grid Array, is the surface-mount package format used for the hashing ASICs and many support chips on modern Antminer, Whatsminer, and Avalon…