What lead free (PbF) solder pastes has EPC used?
EPC currently uses Kester NXG1 Type 3 SAC305 and Kester NP505-HR SAC305 Type 4 solder pastes for soldering eGaN devices. Both pastes are no-clean flux with 88.5% metal.
The figure below shows the recommended reflow profiles for eGaN devices based on the solder paste manufacturers’ recommendations for the pastes. The vendor recommended reflow profiles should always be followed for the paste being used.