(LEAD) Trump signs executive order to protect American polysilicon industry

Lead

U.S. President Donald Trump on Thursday signed a proclamation imposing a 15 percent tariff on polysilicon derivative products and establishing minimum import prices, a move U.S. officials said is intended to protect domestic manufacturing of polysilicon, a material critical to semiconductors and solar panels. According to the South China Morning Post and Yonhap News Agency, the action is meant to counter China's dominance in the sector and to bring production of the material back to the United States.

The tariff will take effect 120 days after the signing — at 12:01 a.m. on Dec. 4 (Washington time), Yonhap reported — and applies alongside a set of minimum import prices for polysilicon and its derivatives.

Coverage Comparison

Both the South China Morning Post and Yonhap framed the move as a protection of American manufacturing, but with different emphases. The South China Morning Post led with the targeting of China's dominance in polysilicon, which it described as a key material used in solar panels and semiconductor manufacturing, and quoted Commerce Secretary Howard Lutnick saying: "We're setting prices so that the Chinese can't dump any more, and we're setting tariffs to say build it here."

Yonhap's dispatches from Washington likewise stressed the rivalry with China over artificial intelligence and other cutting-edge technologies, while devoting considerable attention to the potential impact on South Korea's chip industry and exports to the United States. Yonhap reported that the action was taken under Section 232 of the Trade Expansion Act of 1962, which gives the president authority to adjust imports when he determines they threaten national security. White House Staff Secretary William Scharf was quoted as saying the move is intended to ensure that domestic polysilicon manufacturing is "properly supported and protected from overseas dumping and offshore threats."

Key Claims

• The proclamation imposes a 15 percent tariff on polysilicon derivative products, effective 120 days after the signing, or 12:01 a.m. on Dec. 4 (Washington time), according to the South China Morning Post and Yonhap.
• Minimum import prices are set at US$21 per kilogram for polysilicon, $100 per kilogram for polysilicon ingots and wafers, $0.22 per watt for solar cells, and $0.38 per watt for solar modules, Yonhap reported.
• The action was taken under Section 232 of the Trade Expansion Act of 1962, according to Yonhap.
• The White House said the minimum price program is meant to "create a level playing field for American producers of these strategic goods," Yonhap reported.
• Polysilicon is used to make silicon wafers for AI chips and is also used in solar panels, according to the South China Morning Post and Yonhap.
• South Korea's exports of polysilicon to the United States were estimated at $2.2 million and polysilicon derivatives at $430 million in 2025, Yonhap reported, citing the trade ministry.

Perspectives

United States

The Trump administration characterized the tariffs and price floors as necessary to protect economic and national security. In the proclamation, Trump said: "Polysilicon is the base material underpinning the security of America's semiconductor and solar-power supply chains. Yet for decades, America has allowed foreign countries to weaken U.S. producers in the polysilicon sector, eroding our economic and national security." Commerce Secretary Howard Lutnick said the measures are intended to stop Chinese dumping and bring the supply chain back to the United States: "We're making the products here, but we need the supply chain here."

South Korea

Seoul is assessing the fallout. The Ministry of Trade, Industry and Energy said it will hold a meeting with relevant ministries and companies to evaluate the impact of the tariff on South Korea's exports to the United States, Yonhap reported. The ministry's estimates put South Korea's polysilicon exports to the U.S. at $2.2 million and polysilicon derivatives at $430 million in 2025, indicating a limited exposure in raw polysilicon but a more substantial trade flow in derivative products.