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US 11,239,549 B2Granted
Glass substrate, liquid crystal antenna and high-frequency device
AssigneeAGC Inc.
InventorsShuhei Nomura, Kazutaka Ono
Life of this patent
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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 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.
Dependencies are inferred from the claim text.