How does PCB manufacturer work for double sided SMT assembly with BGA’s?

How does a conventional board house deal with the issue of reflow during PCB component assembly with BGA's on both sides of the board? Are two different solders used (like regular lead free SAC305 and a low temp?)

November 6, 2023

The soldering process for each side of the PCB is the same.

Usually, the surface tension will be enough to hold a BGA in place, given the number of balls compared to the weight of the chip. If it is not the components will be glued, but it is quite rare to need to do it.

By design, one should avoid putting heavy components on each side of the board. On the bottom, there should only be small components.

#PCB Assembly #PCB Design

Oliver Smith

Oliver is an experienced electronics engineer skilled in PCB design, analog circuits, embedded systems, and prototyping. His deep knowledge spans schematic capture, firmware coding, simulation, layout, testing, and troubleshooting. Oliver excels at taking projects from concept to mass production using his electrical design talents and mechanical aptitude.

Oliver Smith

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How does PCB manufacturer work for double sided SMT assembly with BGA’s?

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