SEOUL :Samsung Electronics sought to inject impetus into its memory and foundry chip units by appointing new leaders on Wednesday, as it scrambles to catch SK Hynix and Taiwan's TSMC in the booming AI chip market. The world's biggest memory chipmaker reavowed its faith in semiconductor chief Jun Young-hyun by naming him co-CEO and bestowing direct control of its struggling memory chip business. Samsung also made U.S. chip head Han Jin-man president and head of its foundry business making