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US 2022/0102850 A1Published application
Glass substrate, liquid crystal antenna and high-frequency device
AssigneeAGC Inc.
InventorsShuhei NOMURA, Kazutaka ONO
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Abstract
Provided is a glass substrate with which it is possible to reduce dielectric loss in high-frequency signals, and which also has excellent thermal shock resistance. This invention satisfies the relation {Young's modulus (GPa)×average thermal expansion coefficient (ppm/° C.) at 50-350° C.}≤300 (GPa·ppm/° C.), wherein the relative dielectric constant at 20° C. and 35 GHz does not exceed 10, and the dielectric dissipation factor at 20° C. and 35 GHz does not exceed 0.006.
Claims22
A glass substrate comprising, in mole percentage on an oxide basis:
- 40 to 75% of SiO2;
- 0.5 to 15% of Al2O3;
- 0.1 to 9% of MgO;
- 0 to 8% of CaO;
- 0.1 to 13% of SrO;
- and
- 0 to 10% of BaO, and
- satisfying the following relationship:
- {[Young's modulus (GPa)]×[average coefficient of thermal expansion at 50-350° C. (ppm/° C.)]}≤300 (GPa·ppm/° C.), and
- having a relative permittivity as measured at 20° C. and 35 GHz of 10 or less and a dielectric loss tangent as measured at 20° C. and 35 GHz of 0.006 or less.
7 more elements
Dependencies are inferred from the claim text.