Cofiring Kinetics and Mechanisms of an Ag-Metallized Ceramic-Filled Glass Electronic Package

Cofiring kinetics and mechanisms of an Ag-based ceramic-filled glass packaging system have been investigated. Boundary diffusion controlled solid-state sintering is identified as the controlling densification mechanism of the Ag film. For ceramic-filled glass tape, which is a mixture of glass and ceramic powders, the sintering kinetics are controlled by the viscous flow of low-softening-point glass. With the densification results of Ag film and ceramic-filled glass tape, the camber development during cofiring of a two-layerd structure of Ag film/ceramic-filled glass tape can be theoretically predicted by viscous analysis, which also agrees well with experimental observations.

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