Intel is buying Israeli chipmaker Tower Semiconductor for $5.4 billion, the companies said today, giving it access to more specialised production and making it better positioned to take advantage of soaring demand for semiconductors.

Intel is paying $53 per share for Tower - which specialises in analogue chips used in cars, medical sensors and power management .

This is well above its closing price of $33.13 on the Nasdaq yesterday.

After a delayed opening, Tower's Tel Aviv-listed shares were 40% higher today.

They had surged 48% in after-hours trading on Nasdaq last night after news of a possible takeover was reported. Prior to the announcement, Tower had a market value of $3.6 billion.

The acquisition will deepen Intel's presence in a sector dominated by Taiwan-based TSMC, the world's largest chipmaker, at a time when the global semiconductor shortage has hampered the production of everything from smartphones to cars.

Tower has been investing in equipment at its manufacturing sites in Israel, Texas and Japan to boost capacity for 200 and 300 millimetre chips.

The company serves "fabless" companies - which design chips but outsource manufacturing - as well as integrated device manufacturers and offers more than 2 million wafer starts per year of capacity, the companies said.

Tower Semiconductor changed its name from TowerJazz in 2020.

"Tower's specialty technology portfolio and geographic reach will help scale Intel's foundry services and advance our goal of becoming a major provider of foundry capacity globally," Intel chief executive Pat Gelsinger said.

"This deal will enable Intel to offer a compelling breadth of leading-edge nodes and differentiated specialty technologies on mature nodes - unlocking new opportunities for existing and future customers in an era of unprecedented demand for semiconductors," he added.

The US chipmaker said last month it would invest up to $100 billion to build potentially the world's largest chip-making complex in Ohio. The move is aimed at restoring Intel's dominance in chip-making and reducing America's reliance on Asian manufacturing hubs.

Intel has had a large presence in Israel for nearly 50 years and is one of Israel's largest exporters.

In 2017 it bought Israeli autonomous vehicle technology firm Mobileye for $15.3 billion. The chipmaker has five sites in Israel and some 14,000 employees.

The transaction is expected to close in about 12 months and has already been unanimously approved by both boards.

The deal is still subject to certain regulatory approvals including the approval of Tower's shareholders.

It is expected to be immediately accretive to Intel’s non-GAAP earnings per share. Intel said it intends to fund the acquisition with cash from its balance sheet.

Tower, the companies said, will remain independent until the deal closes. Then, Tower will be integrated into Intel Foundry Services (IFS), which Intel established a year ago to help meet growing global demand for semiconductor manufacturing capacity.