Taiwan Semiconductor Manufacturing Company has filed a lawsuit against former senior executive Wei-Jen Lo, alleging he violated non-compete and confidentiality agreements when he joined rival Intel. Taiwanese prosecutors raided Lo's homes and seized computers as part of their investigation into potential trade secret leaks. Intel has denied any wrongdoing by Lo. The company remains the world's largest contract chipmaker and key supplier to Nvidia. Despite the legal controversy, the stock closed recently at $289.96, showing a 1.85% daily gain.