A monolithic self-constrained green body tape for use in low temperature
ceramic co-firing is provided. The tape contains at least two layers: one
low temperature ceramic layer containing particles of a glass, a ceramic,
and an organic binder, and a self-constraining layer containing a
refractory ceramic and a wetting agent for the glass in the first layer.
When the tape is fired at a sintering temperature of the low temperature
ceramic layer, densification occurs in the z (thickness) direction, but
essentially no shrinkage (less than about 1%) occurs in the x-y planes. A
method for forming a multilayer green body tape using simultaneous wet on
wet ceramic slurry deposition is also provided. A dense, monolithic, low
temperature, co-fired, self-constrained, multicomponent structure is also
provided. The structure contains at least two multilayer ceramic
substrates having electronic circuit components mounted thereon or
therein. Each multilayer ceramic substrate contains at least two layers
with one being a self-constraining layer.
