The Versatile Preform

ABSTRACT Solder preforms are composed of solder alloys and are designed and manufactured into various shapes and configurations. The solder preform concept is quite simple; however, the applications are very diverse. Solder preforms are used in numerous ways, e.g., from simple PCB rework to high-reliability applications, and from package level to board level assembly. They are used in low-volume applications, as in military electronics as well as in high throughput, high-volume applications, such as smartphones. Preforms are also used in robotics and automated processes and to optimize labor-intensive steps in manufacturing processes such as hand soldering. Solder preforms and solder-cored wire offer an opportunity to increase consistency and decrease cycle times in many manufacturing environments. This paper will discuss attributes associated within the solder families that the preforms are composed of, offer simple rule of thumb considerations when considering solder preforms, and take a look at various applications, including the automation of hand soldering to improve consistency and reduce cycle times.