After the researcher transferred novel OLED display technology like excimer laser annealing equipment or a means to optically clean resin inkjet machinery between 2018 to May 2020, they left Samsung and went to work for an OLED panel maker in China.
That’s not to mention their early adoption of the LTPO OLED display technology which saw them introduce dynamic refresh rates and ultrabright panels ahead of everybody else, even Samsung.
In any case, Samsung’s former employee has voluntarily returned to South Korea from China in order to face the industrial espionage charges. The person was actually a member of a leaky team of researchers who worked for Samsung and participated in transferring the OLED display production secrets to a company in South Korea and to China.
They have already been tried and sentenced, while he fled to China and the prosecutors started their investigation into his deeds after being tipped off by the Korean intelligence agency.