Samsung Electronics Co. is getting close to securing certification from Nvidia Corp. for the latest version of its AI memory chip, called HBM4, making progress in narrowing the gap with rival SK Hynix Inc. The Suwon, South Korea-based company has entered the final qualification phase with Nvidia, after supplying its initial samples to the US chipmaker in September, according to people familiar with the matter. Nvidia uses vast quantities of high-bandwidth memory, or HBM, to enable its AI acceler...