Taiwan's TSMC plans to be able to deliver the advanced chips used in Apple's Macs, iPhones and iPads from its new Arizona super-plant by 2024.

TSMC announced on Tuesday it would more than triple its planned investment at its Arizona plant to $40 billion

The US President's visit follows the Taiwanese chipmaker’s move to more than triple its planned investment in the factory to $40 billion

China, which is reeling from punishing US tech sanctions, is exploring using graphene instead of silicon in microchips as it desperately attempts to match its global rivals

A dozen members of staff said they were in "disbelief" at UK ministers ordering China's Nexperia to sell its 86% stake in the plant and travelled to Westminister to protest at the decision

Plans for the new facility in Arizona are not completely finalised but it will produce advanced 3-nanometre chips, founder Morris Chang said on Monday. He plans to attend the launch.

TSMC envoy Morris Chang, who was Taiwan's envoy at the summit in Bangkok, said his warm words with Xi were his own idea and he just offered his "own opinion".

"It was a very happy, polite interaction," Taiwan official Morris Chang said, adding that tensions across the Taiwan Strait were not discussed

The two representatives discussed TSMC's new $12 billion microchip plant in the US state of Arizona

Taiwan’s parliament is likely to review technology transfers to mainland China because of fears that leaked advancements could undermine the island’s critical tech sector

It is imperative for the island to remain competitive as countries including the United States, Japan and South Korea offer billions to bolster their chip industries, the economy ministry said

Britain blocks Chinese takeover of chip factory in Wales, saying the move was prompted by national security concerns.