ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,413,909, issued on Sept. 9, was assigned to FORTEMEDIA INC. (Alviso, Calif.).
"Package structure of micro speaker" was invented by Yu-Xuan Xu (Hsinchu, Taiwan) and Shih-Chin Gong (Taipei, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A package structure of a micro speaker is provided, and includes a substrate, a membrane, a coil, and a magnetic element. The substrate has a hollow chamber. The membrane is disposed on the substrate and covers the hollow chamber. The coil is embedded in the membrane. The magnetic element is disposed in the hollow chamber. A vent hole is formed in and penetrates the membrane, and the vent hole is separated from the...