Micron Technology said Thursday it was planning to expand its U.S. investments in domestic memory manufacturing to about $150 billion and in R&D to $50 billion.

Shares of the chipmaker fell about 1% in premarket trading.

This marks an additional investment of $30 billion beyond prior plans, Micron said.

The additional investment will center around building a second leading-edge memory fab in Boise, Idaho and expanding an existing manufacturing facility in Manassas, Virginia.

Micron's investment aims to bring advanced packaging capabilities to the U.S.- a manufacturing technique essential to high bandwidth memory (HBM), which is employed extensively in the AI market, the company said.