Zierick introduces Surf-Shooter SMT pins especially designed for PCB interconnection applications. The pins have a design which employs capillary action of reflowing solder to improve solder joint strength and increase reliability. Pull-force tests reveal that a pin employing capillary action exhibits much higher retention to the PCB than a pin without. The capillary action contributes to a thinner solder layer which creates a higher retention force of the solder layer between the pin base and the solder pad. A thinner solder layer resists shear more effectively than a thicker layer. In addition, the pin’s capillary action provides a way for gasses to escape. The absence of voids reduces solder joint cracks during thermal cycling. The parts are available in a variety of sizes from 0.025-in (0.64mm) square pins to 0.080-in (2.03mm) round posts, in multiple lengths.
EPP 184
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