Methods for making and using self-constrained low...

Details Methods for making and using self-constrained low... Methods for making and using self-constrained low...

2005-09-27

2005-09-27

Mayes, Melvin (Department: 1734)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S089150, C156S089160

Reexamination Certificate

active

06949156

ABSTRACT:
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.

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Excerpt from Ragan Technologies, Inc., “ZST™ -LTCC In-House/Green Tape Production”, web site http://www.ragantech.com/CIA.html, Jan. 22, 2002.
Excerpt from SMI-ED Ogaki Ceramics, Inc., “Low Temperature Fireable Ceramics”, web site http://www.smiedoc.co.jp/elfc01.html, Jan. 22, 2002.

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