ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,400, issued on June 17, was assigned to CREATING NANO TECHNOLOGIES INC. (Tainan, Taiwan).
"Surface treatment apparatus" was invented by Ming-Yueh Chuang (Tainan, Taiwan), Chau-Nan Hong (Tainan, Taiwan) and Yu-Chi Chang (Tainan, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A high-speed, uniform and high-quality surface treatment apparatus is described. The surface treatment apparatus includes a fixed hollow cylindrical chamber body and a rotatable polygonal prism inside the chamber body. Several flat-substrate holders are symmetrically disposed on the prism surface. The substrate holders revolve as the prism rotates. On the fixed chamber wal...