公开(公告)号：US20230096796A1

公开(公告)日：2023-03-30

申请号：US17802528

申请日：2021-05-17

申请人： Okamoto Glass Co., Ltd.

发明人： Keito SATO ,  Nobuhito TAKESHIMA

IPC分类号： C03C3/089 ,  C03C4/16 ,  C03C12/00 ,  C03C14/00 ,  C03C17/06

摘要： It is demanded that a LTCC substrate composition capable of maintaining low relative permittivity k and high Q value without having a reactivity with a silver which is an electrode material and causing migration of the silver during a co-firing operation at a low temperature. Provided with a low temperature co-fired substrate composition containing 83 to 91 wt. % of CaO-B2O3-SiO2 based glass powder, 7.5 to 14 wt. % of two or more kinds of nanometer-sized SiO2 powders having different ranges of particle diameter and 1.5 to 3 wt. % of β-wollastonite powder as a crystallization agent wherein the glass powder contains 40.0 to 45.0 wt. % of CaO, 9.0 to 20.0 wt. % of B2O3 and 40.0 to 46.0 wt. % of SiO2.