IPC-7093A, "Qualification and Performance of Printed Board Assembly (PBA) Conformal Coating Materials and Processes," is an industry standard from IPC that defines requirements, test methods, and qualification procedures for conformal coating materials and the processes used to apply them to printed board assemblies.
For any engineer dealing with the complexities of BGA technology, this document is considered the "bible" for avoiding the costly trial-and-error process. ipc-7093a pdf
Solder paste volume is the #1 variable in BTC assembly. The standard recommends: The standard recommends: If you are looking for
If you are looking for the PDF, you likely know this is the industry standard. But what exactly does this document cover, and why is it essential reading? Here is a breakdown of what you need to know before you design your next stackup. ipc-7093a pdf