Board Circuiter -- BGA

Ball Grid Array (BGA for short) is one kind of package method for organic substrate.
Features of BGA as follow.
-- High-density pins. In case of same size of package, BGA will adopt more pins, which more easily realizes connection of complicated circuit, and miniaturizes electronics.
-- Better electrical performance. The short and thin pins make the signal transmission path shorten, and make parasitic inductance & capacitance less, which reduce signal delay & distortion.
-- Better heat dispersion. The contact area of between the IC in BGA package and the board is bigger, which is beneficial to heat dispersion.
Therefore, BGA is widely applied in IC package, the used in electronics such as computer processor, image processor, memory chip.
To gain reliable adhesive force, the diameter of BGA pad is usually smaller than solder ball’s. and the diameter is reduced by 20% - 25%. The bigger pad, the smaller space to wire between two pads.

Beyond the core structural and performance strengths, BGA packaging stands out among traditional surface-mount packages due to its excellent assembly stability and design flexibility. Unlike peripheral leaded packages that suffer from bent or damaged pins, BGA relies on arrayed solder balls on the substrate bottom, which effectively avoid mechanical pin damage during production and application. Its self-alignment feature during reflow soldering greatly improves assembly yield and reduces production costs for mass electronic manufacturing. In addition to conventional consumer electronics, BGA has expanded to high-end and industrial fields, including automotive electronic control modules, 5G communication chips, wearable smart devices and industrial precision sensors. Thanks to its stable signal integrity and strong thermal cycling resistance, it can adapt to complex working environments of high temperature and vibration. The optimized pad and solder ball matching design also leaves sufficient wiring space for high-density PCB layout, perfectly meeting the upgrading demand of modern electronic products for high speed, miniaturization and high stability.