ALEXANDRIA, Va., June 19 -- United States Patent no. 12,334,489, issued on June 17, was assigned to Taiwan Semiconductor Manufacturing Co. Ltd. (Hsinchu, Taiwan).
"Lthc as charging barrier in info package formation" was invented by Yi-Jen Lai (Hsinchu, Taiwan), Chung-Yi Lin (Hsinchu, Taiwan), Hsi-Kuei Cheng (Zhubei, Taiwan), Chen-Shien Chen (Zhubei, Taiwan) and Kuo-Chio Liu (Hsinchu, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method includes forming a release film over a carrier, forming a polymer buffer layer over the release film, forming a metal post on the polymer buffer layer, encapsulating the metal post in an encapsulating material, performing a planarization on the encapsulating material...