After being stalled for nearly three years, the third-phase expansion project for the Longtan Park Phase III in the Zhuke (Hsinchu Science Park) Longtan area (Lohke Phase III) has finally been revived. Industry buzz has it that TSMC will return to Longtan to build a next-generation, angstrom-level (E-micron) process wafer fab, with an investment scale estimated at NT$9.07B to NT$600 billion. The news has drawn heightened attention to TSMC’s long-time partner HanTang (2404) and Phan Xuan (6196). The market expects the two companies to win contracts worth hundreds of billions, making them among the beneficiaries of this factory buildout.
Lohke Phase III gets restarted; TSMC lands on a 100-hectare site in Longtan
The Lohke Phase III development project, which had been hanging unresolved for years, reportedly saw a major turning point today. Economic Daily News reported that Hsu Shih-Min, director of the Hsinchu Science Park Administration, confirmed that a public hearing for Lohke Phase III has already been held. The expansion site area has been confirmed at 104 hectares. The feasibility study passed review by the National Science and Technology Council (NSTC) in mid-March this year. It is expected that in May, a budget and establishment plan will be submitted. After deliberation and approval, it will be submitted to the Executive Yuan. The NSTC has also scheduled a park review committee meeting for May 11, and the budget and establishment plan for Lohke Phase III will be one of the agenda items.
Looking back at the winding course of Lohke Phase III, the original plan was to acquire 158.59 hectares of land. However, because as much as 88% of the land was privately owned, it triggered strong backlash from local residents. In the end, TSMC announced in October 2023 that it would give up plans to move in, shifting the focus of advanced process production south to Kaohsiung and Tainan.
Now, against the policy backdrop of the government’s “Taoyuan-Hsinchu-Miaoli Great Silicon Valley (Taoyuan-Hsinchu-Miaoli Great Silicon Valley) plan,” the final confirmed site area is 104 hectares. After the development is completed, it is expected to provide about 50 hectares of industrial land.
TSMC rumored to spend $600 billion to build a plant and introduce angstrom-level process
With the restart of the Lohke Phase III development, industry reports say this land will be used by TSMC to build a next-generation advanced process facility zone. TSMC’s advanced process capacity continues to be in tight supply. Globally, companies are actively expanding capacity, but the shortage of land for new fabs on Taiwan’s main island has become increasingly severe. The restart of the Longtan base is expected to help close the gap.
If TSMC confirms its move-in, external expectations are that it will introduce angstrom (Angstrom)-level process technology that is even more advanced than the current 2-nanometer node. The scale of construction investment is estimated at NT$600 billion. This would not only further solidify Taiwan’s foundation in advanced processes, but also meet the massive demand from major international customers such as NVIDIA and Apple.
That said, TSMC has not yet officially announced its move-in plan. Some reports also suggest that what TSMC is planning could be a panel-level advanced packaging factory rather than a wafer fab. The true details still need clarification.
Is HanTang, TSMC’s partner, the biggest winner with a fully built plant?
As the Lohke Phase III construction opportunity ignites, the first to benefit is HanTang (2404), TSMC’s long-time electrical and mechanical engineering partner. HanTang is TSMC’s most core cooperation partner for cleanroom MEP (mechanical, electrical, and plumbing) engineering, and it is also a key backbone for TSMC’s plant builds in the U.S. state of Arizona. Industry widely expects that once the angstrom-level facility zone for Lohke Phase III officially breaks ground, the order share HanTang wins will be the most significant.
HanTang’s financial performance also fully confirms the strength of its order momentum. In 2025, net profit after tax reached NT$20.29B, up 46.5% year over year. Earnings per share were NT$48.08, with profits hitting new highs for the fourth consecutive year. In the first quarter of 2026, consolidated revenue also reached NT$3.24B. Although slightly down 1.2% quarter over quarter, it remains the best performance for the same period in recent years, with a year-over-year growth rate of as high as 76.2%.
Industry believes that because the angstrom-level process has more stringent requirements for cleanrooms and plant facilities, it will further boost HanTang’s fundamentals.
Phan Xuan has orders packed in hand and can’t stop busy until 2027
Phan Xuan (6196), the leader in the semiconductor plant utilities second-time配 (Hook-up) market, is also drawing attention. Phan Xuan also delivered what was described as its best-ever performance last year: net profit after tax of NT$14.31B, up 79.8% year over year; earnings per share of NT$15.5. In this year’s first quarter, consolidated revenue was NT$14.309 billion, up 7.9% year over year. Phan Xuan revealed that as shipments of Taiwan’s advanced packaging equipment expand, and as wafer-fab construction projects in the U.S., Japan, Germany, and Singapore continue to kick off, the company’s backlog has already hit a record high. It is expected that it will “stay busy until after 2027” to digest these orders.
In addition, the ongoing refinement and precision of wafer manufacturing processes has also driven a major increase in demand for water treatment systems at plant sites. Water treatment players for high-tech fabs, such as Chao-Lien Industrial (6944), have also been named as a potential beneficiary of this wave of construction opportunities.
The restart of Lohke Phase III symbolizes a key signal that Taiwan’s semiconductor industry will continue to deepen its local roots. From policy push at the government level to supply-chain preparation at the industry level, it seems everyone is already in place—waiting only for TSMC to announce its move-in and process details.
This article: “Is the TSMC Longtan plant reviving? Angstrom-level process moves into Lohke Phase III; HanTang and Phan Xuan will take on NT$100 billion-plus orders.” First appeared on Chain News ABMedia.
