摘要 |
A ceramic insulating layer (2) for the multilayer ceramic circuit board (11) consists of 60 wt % of crystallized glass and 40 wt % of a filler such as silicon dioxide bonded by the crystallized glass, which consists of 6-15 wt % of lithium oxide, 70-90 wt % of silicon dioxide, 1-8 wt % of aluminum oxide, 1-5 wt % of alkaline metal oxide other than lithium oxide and 2-5 wt % of alkaline earth metal oxide. The sintered ceramic insulating layer (2) has a dielectric constant below 6.1 and a flexural strength above 150 MPa and is co-firable with a wiring conductor layer of such as gold, silver and copper. |
申请人 |
HITACHI, LTD., TOKIO/TOKYO, JP |
发明人 |
SHINOHARA, HIROICHI;USHIFUSA, NOBUYUKI, HITACHI-SHI IBARAKI 316, JP;NAGAYAMA, KOUSEI, NAKA-GUN IBARAKI 319-11, JP;OGIHARA, SATORU, HITACHI-SHI IBARAKI 319-12, JP |