TOKYO, May 15 : Japanese memory chipmaker Kioxia said on Friday it expected operating profit for the April-June quarter to reach 1.3 trillion yen ($8.20 billion) as the artificial intelligence boom boosts chip demand. • The maker of NAND flash memory chips reported operating profit rose 92.7 per cent to 870.4 billion yen in the year ended March, beating estimates. • Kioxia said it is preparing to list American depositary shares on a U.S. exchange to grow its investor base. • Its share price has