Samsung Electronics Co. kicked off mass production of 3-nanometer chips that are more powerful and efficient than predecessors, beating rival Taiwan Semiconductor Manufacturing Co. to a key milestone in the race to build the most advanced chips in the world.

South Korea’s largest company will begin with 3nm semiconductors for high-performance and specialized low-power computing applications before expanding to mobile processors, it said in a statement on Thursday. By applying so-called Gate-All-Around transistor architecture, Samsung’s 3nm products reduce power consumption by up to 45% and improve performance by 23% compared to 5nm chips, it said.

Samsung shares were down about 1% in Seoul on Thursday, in line with the KOSPI benchmark.

Samsung’s push to be first to market with the latest technology is essential in its uphill climb to match TSMC, which remains dominant in the contract chipmaking, or foundry, market. The Taiwanese firm accounts for more than half of the global foundry business by revenue and is the exclusive supplier of Apple Inc.’s Silicon processors for iPhones, iPads, MacBooks and desktop Mac PCs.

TSMC and Samsung are competing for large multiyear orders from the likes of Apple and Qualcomm Inc. 3nm mass production from the Taiwanese chipmaker will commence in the second half of the year, TSMC has said. Samsung will produce 3nm chips at its Hwaseong facilities and is expected to extend that production to its newest Pyeongtaek fab.

“We will continue active innovation in competitive technology development and build processes that help expedite achieving maturity of technology,” said Siyoung Choi, president and head of Samsung’s foundry business.

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