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Polyimide for Flip Chip Packaging: The Quiet Insulation Layer Carrying AI Chips, HBM, Automotive Compute and the Next $133 Billion Fab Investment Cycle
A flip chip package looks like a tiny black square from the outside, but inside it is a dense traffic system of copper pillars, solder bumps, redistribution layers, passivation films, stress buffers and under-bump metallization. Polyimide for flip chip packaging sits in this traffic system like the roadbed beneath a high-speed rail corridor. It is not the most visible material, but without...
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