Aqueous Processing of Mullite‐Containing Green Sheets

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Abstract
An aqueous‐based slurry for tape‐casting mullite sheets was studied that is suitable for electronic packaging. A latex binder was used to attain the necessary organic content in the tape while maintaining a low slurry viscosity. The colloidal stability of these complex slurries was characterized by electrokinetic sonic amplitude (ESA) measurements and sedimentation experiments. Control of dispersion stability required the addition of a polyelectrolyte. Suitability of the aqueous‐based tapes for multilayer packaging was evaluated by measuring deformation during lamination and by optimizing conditions such that binder loading and total deformation were minimized.

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