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Why Solder Paste is Not a Commodity: Properties that Make a Superior Solder Paste

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  • Solder paste is not a commodity, and it is important to understand why.

    Solder paste is likely the most complex material used in any manufacturing process. I think most people know that solder paste is a combination of solder powder and flux; at first blush it seems quite simple. However, even the solder powder is not a commodity. In superior solder paste, the powder size distribution and the alloy chemistry are both precisely controlled, the solder particles are spherical, and oxidation levels are minimized.