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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Conformal Coating ist ein wichtiges Verfahren, um elektronische Baugruppen vor dem vorzeitigen Ausfall zu schützen. Damit bekommt der Beschichtungsprozess eine immer höhere Bedeutung. Dabei ist die Auftragsstärke ein wichtiges Qualitätskriterium. Nur eine zeitnahe schnelle Messung…
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