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What is high bandwidth memory and why is the US trying to block China’s access to it?

CNN
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The US government has imposed fresh export controls on the sale of high tech memory chips to China .

The rules apply to US -made high bandwidth memory ( HBM ) technology as well as foreign-produced ones.

HBM chips are indispensable to running increasingly popular AI applications, including generative AI , which are powered by AI processors.

Unit sales price of HBM is several times higher than that of a conventional memory chip.

Each layer of standard memory chips that are stacked together need to be extremely thin as well.

The height of an HBM memory chip is roughly that of six strands of hair.

“It’s almost like building a house of cards,” Hutcheson said.