Abstract
SiC and GaN are attractive wide bandgap semiconductors for the new generation power devices. In order to realize the application in the market, the packaging materials, especially die-attach, has one of the key role as well as the packaging design structure. Ag sinter joining is one of the promising die-attach technologies. The advantages of Ag sintering are excellent heat-resistance, high bonding strength, high heat conductivity, easy handling capability (ambient atmosphere, low temperature and low pressure), and affordability without any nano materials.SiC die-attached made by Ag sinter joining exhibits excellent reliability in power cycling beyond 250 °C (Tj max ). Low temperature and low pressure Ag sintering utilizes its unique reaction with oxygen around 200 °C. The metallization structure both for a SiC die and for a substrate is also critical due to thermal stability and to oxidation. Some features of reliability testing methods will be mentioned in the presentation.
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