Due to the influence of a low-pressure system and southwest airflow, a heavy rain advisory was issued for the Yunlin, Chiayi, and Tainan regions on July 28, 2025. Chiayi County urgently announced work and school suspensions in the morning. TSMC's Chiayi AP7 advanced packaging plant reportedly experienced flooding, with some areas submerged up to knee level. On-site workers were wading through muddy water, and construction operations were affected.
TSMC stated that the construction area handed over to contractors in Chiayi paused operations on July 28 following the natural disaster suspension notice from the Chiayi County Government. Disaster prevention teams remained on standby at the site and completed relevant disaster inspection procedures. These included checks to ensure drainage channels were clear, preparation of drainage pumps, and reduction of temporary installations exposed to strong winds, such as protective nets and fences.
Due to significant rainfall, some external public roads around the construction zones accumulated water, and pumping and restoration efforts are underway. Given that the plant base is designed higher than the road surface, current construction activities remain unaffected. TSMC will continue monitoring the rainfall and implement related disaster prevention measures to ensure personnel and environmental safety while minimizing potential risks.
Reportedly, the Chiayi AP7 plant is TSMC's newest and largest advanced packaging facility, currently undergoing intensive construction. The plan includes eight factories: P1 is dedicated to Apple's WMCM production line; P2 and P3 focus on SoIC technology; panel-level packaging "CoPoS" is tentatively planned for P4 or P5, with mass production expected in the first half of 2029. The CoWoS expansion over the past two years is located at the Southern Taiwan Science Park AP8 site.
Article edited by Jack Wu
