Ceramic sintered body and a process for its production

Details Ceramic sintered body and a process for its production Ceramic sintered body and a process for its production

1998-04-22

2000-09-19

Turner, Archene

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

501 32, C04B 3500

Patent

active

061211737

ABSTRACT:
The ceramic sintered body of this invention contains at least 14.9% by weight of Si calculated as SiO.sub.2, 1 to 84.9% by weight of Zn calculated as ZnO, 0.1 to 15% by weight of B calculated as B.sub.2 O.sub.3 and 0.1 to 10% by weight of Li calculated as Li.sub.2 O, and especially, a quartz crystal phase and a willemite crystal phase are precipitated. This sintered body has low dielectric constant and low dielectric loss in a high frequency region, and the thermal expansion coefficient at room temperature to 400.degree. C. can be adjusted to 1.5 to 17 ppm/.degree. C. For this reason, this sintered body is extremely useful as an insulated substrate for use in a wiring board for transmitting high frequency signals.

REFERENCES:
patent: 5338710 (1994-08-01), Ishigame et al.
patent: 5658835 (1997-08-01), Onitani et al.

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