Yangtze Memory Technologies Co (YMTC), China's leading memory chip producer, has manufactured the "world's most advanced" 3D NAND memory chip known to be in a consumer device in a "surprise technology leap", according to a report by TechInights. YMTC's memory chip, found in a solid-state drive launched quietly in July, shows that the manufacturer has continued to develop advanced technology despite being hampered by sanctions after it was placed on the US Commerce Department's Entity List, accor