Strengthening of multilayer ceramic/glass articles

Details Strengthening of multilayer ceramic/glass articles Strengthening of multilayer ceramic/glass articles

1993-06-25

1995-05-02

Woodard, Joye L.

Glass manufacturing

Processes

With shaping of particulate material and subsequent fusing...

65 176, 156 89, 264 58, 264 61, C03B 1906

Patent

active

054115639

ABSTRACT:
A method for preparing strengthened ceramic/glass substrates by laminating and sintering multiple layers of ceramic/glass precursory substrates having different thermal expansion coefficients, with the inner layer having higher thermal expansion coefficient and the outer layers having lower thermal expansion coefficient. After the sintered substrates are cooled, a compressive stress will be permanently imparted in the sintered substrates which will be exerted onto the surface layer thereof. Such a compressive stress has the effect of impeding the growth of any defects and thus provides the strengthening effect. The method disclosed in the present invention can be used to strengthen ceramic/glass substrates that contain electronic parts or conductor circuits.

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