Jan 5 (Reuters) - Shares of the world's top memory chip providers rose on Monday as investors bet on further ​price gains due to a global supply crunch driven by ‌surging demand for artificial-intelligence infrastructure. Samsung co-CEO TM Roh described the shortage as "unprecedented" in an ‌interview with Reuters, echoing peers who have warned that constraints could persist for months, if not years, as the race to build AI infrastructure consumes supply. That demand has prompted memory chipmakers to di ...