| 摘要 |
A low temperature firing glass-ceramic substrate comprising a borosilicate glass, alpha -alumina, gamma -alumina, and mullite crystals crystallized out in a dispersed form from the borosilicate glass and the gamma -alumina, and a production process of the substrate. It is an object of this invention to provide a glass-ceramic substrate, which is low in dielectric constant and dielectric loss and high in strength and is useful for multilayer wiring.
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