ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,439,729, issued on Oct. 7, was assigned to GOLD STONE (FUJIAN) ENERGY COMPANY Ltd. (Quanzhou, China).

"Heterojunction solar cell and manufacturing method thereof" was invented by Chaohui Lin (Quanzhou, China) and Kairui Lin (Quanzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A heterojunction solar cell and a manufacturing method thereof are provided. The manufacturing method includes the following steps: A: forming a tunnel oxide layer on a first main surface of a semiconductor substrate; B: forming a first intrinsic polysilicon layer on the tunnel oxide layer; C: forming the first intrinsic polysilicon layer into a P-type polysilicon layer b...