After JinkoSolar, Atlas began to fight back against First solar's patent infringement lawsuit. On August 22, Atlas filed an application to the U.S. Patent Trial and Appeal Board (PTAB) to initiate a patent invalidation procedure (IPR procedure) against First solar's US9130074B2 patent. In May
this year, First solar sued Atlas for infringement of its TOPCon patented technology, and on February 25, it sued JinkoSolar in the United States for the same patent. On July 18, JinkoSolar filed an IPR procedure for the above patent of First Solar.