20,000 Workers Descend on Pyeongtaek: 5 Signals Samsung's P4 Overtime Rush Is Accelerating the Semiconductor Mega-Cycle
Since construction resumed in November 2025, 20,000 workers from across the country have converged on Samsung Electronics' Pyeongtaek P4 site, where two hours of daily overtime has become the norm. Dubbed the 'Pyeongtaek Spring,' this phenomenon is the most vivid signal yet that the AI semiconductor mega-cycle has become reality.
Why you should read this now: At 7 PM, thousands of workers in brightly colored hard hats pour out of the Pyeongtaek Campus P4 construction site in unison — this is not just a construction photo. It is the most intuitive scene showing that Korea's semiconductor industry, frozen in 2024, has entered a mega-cycle phase.
TL;DR
- 20,000 workers from across the country have gathered at Samsung Electronics' Pyeongtaek P4 construction site
- 2 hours of daily overtime from February implemented to compress the construction schedule
- P4 completion target: originally Q1 2027 → advanced to Q4 2026
- P4 converted to a dedicated HBM4 memory (1c DRAM) production hub for AI GPUs
- Simultaneously, P5 (targeting 2028 operation, triple-fab structure) is under parallel construction
1. The Facts: What Is Happening in Pyeongtaek
Construction of Samsung Electronics' Pyeongtaek Campus P4 plant, briefly halted in early 2024 due to global semiconductor oversupply, resumed in November 2025.
Immediately after the restart, construction workers from across the country flocked to the site. As of February 2026, on-site personnel number approximately 20,000. They fill the area around the plant from 5 AM, giving rise to the saying that "Pyeongtaek's dawn is as bright as midday."
"To meet the schedule, most of us have been working two extra hours since February."
— Yoon Seong-man (52), P4 site worker (Yonhap News feature, 2026.3.2)
Quitting time, once at 5 PM, has been pushed to 7 PM; exterior lighting blazes through the night, and more than 40 tower cranes continue stacking a vast forest of steel frames.
2. Why the Urgency: Driving Factors
The Mega-Cycle Becomes Reality
The memory semiconductor market has entered a 'mega-cycle' phase, creating a structural imbalance where demand is outpacing supply. Expanding investment in AI infrastructure is the core driver.
P4's Strategic Pivot:
- Originally planned as a foundry line → converted to a dedicated 1c DRAM (for HBM4) line
- Maximum monthly production of 100,000–120,000 wafers planned
- Expanding HBM4 supply to Nvidia is the direct motivation
Samsung Foundry Break-Even Also Moved Up:
- Foundry profitability target: 2027 → advanced to 2026 (Digitimes, 2026.3.3)
3. Context: What Kind of Facilities Are P4 and P5?
| Category | P4 | P5 |
|---|---|---|
| Location | Godeok-myeon, Pyeongtaek, Gyeonggi | Adjacent within the same campus |
| Structure | Double fab (2-story cleanroom) | Triple fab (3-story cleanroom, world's first) |
| Key Products | 1c DRAM / HBM4 | Next-generation high-performance memory |
| Operation Target | Q4 2026 (advanced) | 2028 |
| Monthly Capacity | Up to 120,000 wafers | TBD |
P5 goes beyond the 'double fab' structure adopted in P1–P4, introducing the world's first triple fab structure that stacks three cleanroom floors vertically. It is an innovation that multiplies production efficiency vertically within the same footprint.
4. Outlook: How Long Will This Boom Last?
Optimistic Scenario:
- HBM demand for AI servers surges 2026–2028 → P4 and P5 running at full capacity
- SK Hynix's Yongin Phase 1 fab also pursuing early completion → industry-wide investment competition
- Memory price increases + rising exchange rate (KRW/USD at ₩1,500s) — double tailwind
Risk Scenario:
- Prolonged US-Iran war → energy prices spike → manufacturing costs rise
- Price competition resumes as Chinese semiconductor companies close the gap
- HBM4 supply disruption if P4 Q4 2026 start-up is delayed
5. Checklist: 5 Key Mega-Cycle Watchpoints
Observation Points
- 🔴 Local Economic Thermometer: Restaurant revenues near Pyeongtaek Godeok surging, convenience store late-night sales rising. The construction boom is leading local consumption as a leading indicator.
- 🟡 Risk: With 20,000 workers concentrated on site, industrial accidents and labor disputes are possible. Prolonged overtime may lead to fatigue accumulation.
- 🟢 Global Context: At MWC 2026, AI and 6G infrastructure were the central topics. Pyeongtaek is the actual manufacturing site for HBM — the hardware foundation of those technologies. This is where tech discourse and manufacturing reality converge.
References
- Yonhap News Feature: 'The Pyeongtaek Spring' (2026.3.2)
- Chosun Ilbo: The 5 AM Semiconductor Commute (2026.2.21)
- Chosun Biz: Samsung and SK Hynix Accelerate Production Schedules in Semiconductor Mega-Cycle (2026.2.26)
- Digital Daily: P4 and P5 Construction Accelerated (2026.2.24)
- Digitimes: Samsung moves up foundry breakeven to 2026 (2026.3.3)
Image source: Yonhap News (seephoto@yna.co.kr) — Copyright-protected; direct embedding not possible. Please refer to the original link.