By Hyunjoo Jin, Heekyong Yang and Joyce Lee SEOUL (Reuters) -Samsung Electronics expects demand for memory chips for the global AI infrastructure build-out to far outstrip the company's supply, and said on Thursday it will focus on mass producing its most advanced chips to capitalise on the boom. Samsung posted record quarterly revenue from its key memory chip business on Thursday, an impressive turnaround, after disappointing performances in the past several quarters as it struggled to catch up with competitors in the AI chip race. The world's top memory chipmaker said it plans to significantly expand production of high-bandwidth memory (HBM) chips, a key building block of artificial intelligence chipsets, and sharply increase capital spending next year to meet rising demand. "It is expec

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