Asthma and Rosin Flux: Uncovering the Chemistry Behind Soldering

The world of soldering is complex, and one of the most crucial elements in this process is flux. For centuries, rosin-based fluxes have been used to increase friction, as a glue, binding agent, or varnish. But what exactly is rosin, and how does it impact the electronics manufacturing services (EMS) industry?

Rosin is a resin obtained by heating and distilling naturally occurring resins from conifer trees such as pines. Historically, most fluxes were rosin-based, but in recent decades, there has been a shift towards alternative options. The EMS house wants to minimize costs while maximizing yields, whereas the customer may prioritize environmental sustainability, corrosion resistance, and compatibility with future treatments.

As we delve into the world of fluxes, it's essential to understand that choosing the right type is where the interests of the EMS house and the customer diverge. In this article, we'll explore what fluxes are, their composition, usage guidelines, and the direction the industry is heading in.

In the modern electronics industry, soldering without flux is not an option. Connectors, conductive adhesives, wire-bonding, or zebra-tape may be used in some cases, but for most applications, a flux is necessary to create a reliable electric connection. The truth is that PCB fabrication is a complex and fundamental aspect of electronics engineering that deserves recognition.

As engineers, we often take the intricacies of the industry for granted, focusing on higher-level design and development tasks while neglecting the underlying technologies. However, understanding the chemistry behind soldering, including the role of rosin flux, is crucial to ensuring the quality and reliability of our products.

In conclusion, asthma and rosin flux are two seemingly unrelated terms that highlight the complexities of the electronics manufacturing services industry. As we continue to push the boundaries of technology, it's essential to acknowledge the importance of chemistry in soldering processes and choose the right type of flux for our applications.

Asthma and rosin flux