NotBlackMagic @notblackmagic.com · Jan 25 The most critical step in BGA assembly: applying the solder paste. Too much = bridges. Too little = open circuits. ⚖️ Stencil perfectly aligned and with one clean swipe, the result is crisp. (Not the first attempt 😉) Next up: Placement.👇 #PCBDesign #Robotics #Engineering #STM32
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Step 2: The Placement. Placing fine-pitch BGAs by hand with quality tweezers and a, somewhat, steady hand. Dropping the STM32N6 and the memory chips onto their pads. You have to trust the alignment. Next up: Reflow on the hot plate. 🔥 #PCBAssembly #STM32N6 #PickAndPlace
I have only done one BGA board with a tiny 20 ball device. I have never designed something with a larger device because at the time the cost of the boards was prohibitive. I may have to take a look again as costs have fallen for services that can make these boards.