Taiwan’s National Development Council (NDC) approved a draft plan on September 17, 2026, to expand Longtan Science Park in Taoyuan by about 104 hectares. The NDC scheduled public-infrastructure design and construction to begin in 2030, after land acquisition, with land-permit and environmental reviews due to finish by the end of 2028. The council said it would submit the draft to the Executive Yuan for approval.
What the Longtan plan covers
The proposed expansion is east of the existing park. The NDC said it is intended to strengthen the semiconductor cluster across the Taoyuan–Hsinchu–Miaoli region.
The plan estimates development costs at NT$95.628 billion, with funding budgeted over time from the Science Park Bureau’s operating fund. After completion, the expanded park is projected to generate about NT$550 billion in annual output and 4,500 jobs. Those are forecasts, not current output or employment.
Reviews come before infrastructure work
The NDC’s schedule sets out three milestones:
| Milestone | Timing | Details |
| Draft-plan approval | September 17, 2026 | The NDC approved the draft and said it would submit it to the Executive Yuan for approval. |
| Land and environmental reviews | By the end of 2028 | Reviews for non-urban land development permits and environmental impact assessment are scheduled to finish. |
| Public infrastructure | 2030, after land acquisition | Design and construction are scheduled to begin. Companies could build their facilities concurrently. |
What the plan says about TSMC and CoPoS
The September 17 decision is an approval for a park expansion, not an announcement of a TSMC facility or a CoPoS project. CoPoS, short for Chip-on-Panel-on-Substrate, is an advanced packaging technology.
Focus Taiwan reported that local media had said in May 2026 that TSMC was seeking government approval for an advanced wafer fab at Longtan. On September 18, 2026, TechNews reported, citing supply-chain sources, that Longtan was being prioritized for advanced wafer fabrication, while advanced packaging, including CoPoS, was being expanded at Chiayi and Southern Taiwan Science Park.
