Bonding Temperature Optimization and Property Evolution of SU-8 Material in Metal/Adhesive Hybrid Wafer Bonding
Abstract:Bonding temperature optimization of SU-8 material for metal/adhesive hybrid bonding was investigated. The good bond quality of SU-8 adhesive can be achieved with the bonding temperature between 150 °C and 250 °C, while bond failures of SU-8 wafers are observed starting from 275 °C. IR transmittance spectra measurements indicate the crosslinks inside SU-8 break and further bond failure is observed due to the large decomposition of epoxy rings and phenyl in plane bending above 275 °C. This research provides guidelines of material selection and bonding parameters for heterogeneous integration, 3DIC and MEMS applications using metal/adhesive hybrid bonding.
Document Type: Research Article
Publication date: August 1, 2011
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