US Patent Issued to AGC on Aug. 11 for "Glass substrate for high-frequency device and circuit board for high-frequency device" (Japanese Inventors)

ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,703,657, issued on Aug. 11, was assigned to AGC Inc. (Tokyo).

"Glass substrate for high-frequency device and circuit board for high-frequency device" was invented by Kazutaka Ono (Tokyo), Shuhei Nomura (Tokyo), Nobutaka Kidera (Tokyo) and Nobuhiko Takeshita (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "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 sur...