This initiative is a follow-on to the Pb-Free Alloy Alternatives Project. The project team is now working on characterization of Pb-free alloy alternatives, with two main thrusts: (1) characterize the thermal fatigue and acceleration behavior of alternative alloys through accelerated thermal cycle testing, and (2) develop a set of test data requirements that will allow OEMs and others to evaluate alloy properties against their requirements.
The purpose of this project is to assess the surface mount processibility and reliability of the solder joints formed when enhanced BiSn-based solder pastes are used for assembling electronic components on printed circuit boards.
This iNEMI project team developed a method for testing conformal coating that can be completed in a week compared to the months previously required to determine the mean time to failure. The team also investigated the impact of temperature and humidity on corrosion rates of conformally coated test coupons compared to uncoated ones
The focus of this project is to isolate the effects of several key parameters on thermal cycle reliability of a large body QFN package.
This project proposes a proof-of-concept of the methodology defined in Phases 1 and 2, inclusive of defining a test vehicle and evaluating its response to the proposed test framework.
Phase 2 of the project plans to develop a common test vehicle(s) to accurately reflect typical DUT (device under test) modules, and to validate or develop pass/fail criteria. Additionally, this phase will review standards and test methodology requirements for PCBA materials in other industry sectors that also require high reliability and durability in harsh environments, such as aerospace.
In Phase 2, the team compared the performance of conformal coatings exposed to the flowers-of-sulfur (FoS) environment to those exposed to a mixed flowing gas (MFG) environment.