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1. (WO2018105333) MULTILAYER CERAMIC SUBSTRATE AND ELECTRONIC DEVICE

Pub. No.:    WO/2018/105333    International Application No.:    PCT/JP2017/040930
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Wed Nov 15 00:59:59 CET 2017
IPC: H05K 3/46
H01L 23/15
Applicants: MURATA MANUFACTURING CO., LTD.
株式会社村田製作所
Inventors: FUJITA, Seiji
藤田 誠司
Title: MULTILAYER CERAMIC SUBSTRATE AND ELECTRONIC DEVICE
Abstract:
This multilayer ceramic substrate has a laminated structure comprising a surface layer section positioned on the surface, and an inner layer section positioned further toward inside than the surface layer section, said multilayer ceramic substrate having a surface layer electrode that is provided on the surface of the surface layer section. The multilayer ceramic substrate is characterized in that: the surface layer section includes a first layer adjacent to the inner layer section; the inner layer section includes a second layer adjacent to the first layer; in the first layer, the porosity is 13 % or lower, and the maximum pore diameter is 10 μm or smaller; and in the second layer, the porosity is 14 % or lower, and the maximum pore diameter is 11 μm or smaller.