PORR secured a turnkey cleanroom construction contract from X-FAB Silicon Foundries for a MEMS and microsystems production facility in Erfurt, Germany, with completion scheduled by 2028. The contract value sits in the €200-250 million range based on comparable cleanroom builds at ISO Class 5-6 specification, though neither party disclosed final figures. X-FAB operates the site as part of its 200mm wafer capacity footprint serving automotive and industrial sensor applications.

The facility extends X-FAB's existing Erfurt operations, which already handle analog and mixed-signal production across 30,000 wafer starts per month. MEMS production requires tighter contamination control than standard analog lines—particulate counts below 100 particles per cubic meter at 0.1 micron size—driving construction complexity and timeline. PORR will deliver structural buildout, cleanroom envelope, and process utility infrastructure including deionized water loops and chemical distribution manifolds. The 2028 target aligns with European semiconductor capacity goals under the Chips Act, which allocated €43 billion in subsidies through 2030.

This matters because European MEMS capacity remains bottlenecked while automotive electrification and industrial automation pull demand forward. X-FAB's Erfurt expansion follows Bosch's €3 billion Dresden fab announcement in 2023 and Infineon's €5 billion expansion in Villach, all targeting 200mm MEMS and power semiconductor lines. PORR's win positions the firm inside a narrow builder cohort qualified for semiconductor-grade construction—M+W Group, Exyte, and now PORR—at a moment when lead times for cleanroom projects stretch past 36 months. The contract also de-risks PORR's 2025-2028 order book, which had tilted heavily toward infrastructure and residential segments with thinner margin profiles.

Allocators should watch X-FAB's wafer pricing announcements through Q2 2025 and any capacity reservation agreements with Tier 1 automotive suppliers, particularly Continental and ZF Friedrichshafen, both of which source MEMS inertial sensors and pressure devices from the Erfurt line. PORR's execution risk centers on labor availability in Thuringia, where semiconductor construction projects now compete with battery gigafactory builds for skilled tradespeople. Any slippage past the 2028 window would coincide with X-FAB's 2029 revenue guidance of €900-950 million, creating margin pressure if capacity ramps delay.

PORR's order backlog now exceeds €8.2 billion, with semiconductor and industrial projects comprising roughly 18% of the total, up from 9% in 2022.