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Bridge Free Wave Soldering of 0.5mm Pitch 100 Pins QFP with SN100C

Bridge Free Wave Soldering of 0.5mm Pitch 100 Pins QFP with SN100C
Bridge-free wave soldering of 0.5mm pitch 100 pins QFP is being consistently achieved with
Nihon Superior’s flagship lead-free solder, SN100C in mass production by a major
manufacturer of hi-fi audio equipment. Bridge-free wave soldering of 0.65mm pitch QFP has
been routinely achieved with SN100C for several years but this breakthrough to the next level
is testimony to the capability of this unique alloy.
SN100C is the lead-free solder invented by Nihon Superior and, as of November 2005,
patented in 24 countries and regions with further applications still being processed. SN100C
is based on the economical and environmentally friendly silver-free Sn-0.7Cu eutectic with
trace additions of Ni and Ge that result in higher fluidity and less oxidation than widely
promoted alternative lead-free solders. It is these properties that have made it possible to
solder successfully fine pitch components.
Since SN100C, like the “63/37” Sn-Pb alloy it replaces, freezes as a true eutectic the fillets
are bright and smooth and free of the deep shrinkage cavities that are characteristic of some
alternative lead-free solders.
Because of its high performance as a solder and the reliability of the joint made with it
SN100C has found wide application in the manufacture of products ranging from simple cell
phone battery chargers through consumer electronics such plasma display panels, DVD
players and domestic appliances and air conditioners through to advanced industrial control
equipment. An increasing number of manufacturers of high-end audio equipment are using
SN100C because of the superior quality of sound produced by systems assembled with this
alloy.

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