Glass substrate for high-frequency device and circuit board for high-frequency device

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United States of America Patent

PATENT NO 12037283
APP PUB NO 20210163341A1
SERIAL NO

17174615

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Abstract

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A glass substrate for a high-frequency device, which contains, in terms of mole percent on the basis of oxides: 40 to 75% of SiO2; 0 to 15% of Al2O3; 13 to 23% of B2O3; 2.5 to 11% of MgO; and 0 to 13% of CaO, and having a total content of alkali metal oxides in the range of 0.001-5%, where at least one main surface of the glass substrate has a surface roughness of 1.5 nm or less in terms of arithmetic average roughness Ra, and the glass substrate has a dielectric dissipation factor at 35 GHz of 0.007 or less.

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Patent Owner(s)

Patent OwnerAddress
AGC INC5-1 MARUNOUCHI 1-CHOME CHIYODA-KU TOKYO 100-8405

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kidera, Nobutaka Tokyo, JP 14 40
Nomura, Shuhei Tokyo, JP 27 69
Ono, Kazutaka Tokyo, JP 90 778
Takeshita, Nobuhiko Tokyo, JP 16 46

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