ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,466,761, issued on Nov. 11, was assigned to Okamoto Glass Co. Ltd. (Kashiwa, Japan).
"Low temperature co-fired substrate composition" was invented by Keito Sato (Kashiwa, Japan) and Nobuhito Takeshima (Kashiwa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "It is demanded that a LTCC substrate composition capable of maintaining low relative permittivity k and high Q value without having a reactivity with a silver which is an electrode material and causing migration of the silver during a co-firing operation at a low temperature. Provided with a low temperature co-fired substrate composition containing 83 to 91 wt. % of CaO-B2O3-SiO2 based glass po...