Thursday, March 1, 2018 - 9:00 am to 10:00 am
Technical Conference Sessions, Location 2
Daniel Schnee, Head of Paste Development at Heraeus Electronics
Typical non-pressure sintering profile carried out in a convection oven takes approximately 4 hours long to complete, which if shorten, increases attractiveness to adopt non-pressure sintering.
In this study, the objective was to investigate using IR radiation to reduce the total sintering process time. From our investigations using IR radiation, comparable non-pressure sintered results were achieved with 25% of the standard convection oven profile. In convection oven, non-pressure sintering is achievable up to typically 25 mm² die dimension.
Above this die dimension, risk of sinter defects increases. With IR radiation, cross section of die sizes above 25 mm² did not detect channeling nor voids. From the IR temperature profiling analysis, the uniform heat distribution within the specimen was a critical improvement, which encourages homogeneous densification of the sintered layer.
Furthermore we observed increases in die shear strength and higher thermal conductivity.