BGA solder bubble detection for PCBA circuit boards
Release time：2024-04-16Publisher:Jeenoce
PCBA circuit board bubbles:
During the SMT soldering process of PCBA circuit boards, bubbles are inevitable in the solder balls during BGA soldering. There is a specified standard in the industry for the size of the bubble area of the solder balls, which is to ensure that the product avoids or reduces the probability of defects, malfunctions, and unusable situations when put into use.
In the past, the electronics industry established standards for PCBA bubbles:
The diameter of BGA bubbles in general consumer electronics shall not exceed 60% of the diameter of tin balls or the area shall not exceed 36%;
The diameter of commercial industrial electronic BGA bubbles shall not exceed 42% of the diameter of tin balls or the area shall not exceed 20.25%;
Military and medical industries have stricter requirements for solder ball welding, with BGA bubble diameter not exceeding 30% of the solder ball diameter or area not exceeding 9%;
The new definition standard for BGA bubbles in today's industry:
With the passage of time and technological progress, the industry has re established new BGA bubble standards, which require the welding diameter of bubbles in non industrial medical products to not exceed 25% or the area to be less than 20.25%.
BGA testing standards:
The quality of PCBA welding can be tested through relevant professional testing equipment, such as the popular X-RAY testing equipment in the market. Its powerful penetration force penetrates the interior of the product to detect whether there are corresponding defects in the internal structure of the product. Moreover, the X-RAY testing equipment has the function of automatically calculating the bubble area.
At present, X-RAY testing equipment has been widely used in the electronics industry, with customers all over the world, such as large domestic listed companies such as Lixun Precision, BYD, Foxconn, Zhuzhou CRRC, Fukui Electronics, Chery Automobile, HTC, Weichuangli, Emerson, Sanxiong Aurora, and Skyworth Electronics.
