MANASSAS, Virginia, May 22 (Reuters) - U.S. Trade

Representative Jamieson Greer said on Friday that there were no

imminent U.S. tariffs expected to be imposed on semiconductors

but that it was important to protect the sector with duties to

facilitate reshoring of chip production.

Greer, speaking at a Micron Technology ( MU ) memory chip

plant expansion project in the Washington, DC suburbs, said that

any tariffs USTR's long-awaited Section 232 national security

investigation aimed at protecting the U.S. semiconductor sector

needed to be properly sequenced to promote U.S. output.

"So, having tariffs on semiconductors is really important.

What's even more important than having protection for facilities

like this, is making sure we do it on the right timing and in

the right amount," Greer said.

"There was not an immediate tariff coming," he said.