Multilayer composite ceramic substrate: Fid-Bau Portal

Multilayer composite ceramic substrate

ZHOU KAIMOU / WU SIHAN / LAI ZHIWEI / SHI JIANYU

The invention discloses a multi-layer composite ceramic substrate which comprises a nitride ceramic core layer and two ceramic coating layers formed on the two opposite sides of the nitride ceramic core layer respectively. The nitride ceramic core layer is an aluminum nitride layer and is formed by sintering sphere-like aluminum nitride powder. And the two ceramic coating layers and the nitride ceramic core layer are sintered and fixed together. And each ceramic coating layer is a modified aluminum nitride layer and is formed by jointly sintering spheroidic aluminum nitride powder and modified powder. The modified powder includes at least one of non-spherical aluminum nitride powder and boron nitride powder. Each ceramic coating layer covers at least 80% of the area of the corresponding ceramic plate face in the thickness direction, and the sum of the thicknesses of the two ceramic coating layers is not larger than the thickness of the nitride ceramic core layer. Therefore, the multi-layer composite ceramic substrate has composite performance through a specific layered structure different from that in the prior art.

本申请公开一种多层式复合陶瓷基板，其包含一氮化物陶瓷核心层及分别形成于氮化物陶瓷核心层相反两侧的两个陶瓷披覆层。氮化物陶瓷核心层为一氮化铝层，其由类球形氮化铝粉末烧结而形成。两个陶瓷披覆层与氮化物陶瓷核心层共同烧结固定。每个陶瓷披覆层为一改质氮化铝层，其由类球形氮化铝粉末混合改质粉末所共同烧结而形成。改质粉末包含非球形氮化铝粉末与氮化硼粉末的至少其中之一。每个陶瓷披覆层沿厚度方向覆盖相对应陶瓷板面的至少80％面积，并且两个陶瓷披覆层的厚度总和不大于氮化物陶瓷核心层的厚度。据此，多层式复合陶瓷基板通过有别于既有技术的特定层状架构，以具备复合性能。

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