Key Considerations for Semiconductor Laboratory Design and Construction

As the core hub for cutting-edge semiconductor technology R&D and production, the semiconductor laboratory’s design and construction must seamlessly integrate cleanroom control, safety standards, equipment compatibility, and future scalability—every single detail directly influencing experimental accuracy and operational efficiency. Below, we break down the key aspects of semiconductor lab design and construction across four critical dimensions: core design principles, essential system engineering, construction management highlights, and post-completion maintenance & operations.

I. Core Design Principles: Laying the Foundation for Safety and Efficiency

Semiconductor laboratory design should center on "scientific compliance, safety first, precise control, and flexible adaptability," while balancing current needs with long-term development.

1. Compliance First: Strictly adhere to national and industry standards such as the "Semiconductor Device Manufacturing Environmental Specifications" and the "Cleanroom Design Code," while also meeting the ISO 14644 cleanliness level requirements, ensuring that the laboratory meets the fundamental qualifications for production and R&D.
2. Safety-based tiered management and control: Based on the chemicals involved in the experimental process—such as photoresist and etching solutions—as well as gases like hydrogen and ammonia, and risks associated with high temperatures and pressures, functional areas such as explosion-proof zones, corrosion zones, and cleanrooms are designated. Clear isolation and protective measures are established between these zones.
3. Flexible and adaptable layout: Adopting a modular design concept, it reserves space for equipment upgrades and process adjustments—such as pre-installed extra pipeline interfaces and robust structural supports—ensuring that future modifications won’t compromise the cleanroom environment.

II. Core System Design: Focusing on Precision and Stability

Semiconductor experiments demand extremely high precision in environmental parameters and media supply, and the core system design is crucial for realizing the lab's functionality.

(1) Cleanroom System: The Core of Contamination Control

1. Cleanliness Level Design: Classify levels based on the requirements of each experimental stage. Core areas such as lithography and thin-film deposition must meet ISO 5 (Class 100) or higher, while auxiliary areas can be set at ISO 7 (Class 10,000). Cross-contamination is prevented through differential pressure control—maintaining a positive pressure of 5–10 Pa in clean zones relative to non-clean areas.
2. Airflow Optimization: Employ vertical unidirectional flow or horizontal unidirectional flow designs, paired with High-Efficiency Particulate Air (HEPA) filters or Ultra-Low Penetration Air (ULPA) filters, to ensure uniform and stable airflow while minimizing dust particle settling.
3. Precise temperature and humidity control: Maintaining the temperature between 20-24°C and humidity at 45%-55%, the system achieves temperature fluctuations within ±0.1°C and humidity variations within ±2% via a high-precision air-conditioning system, ensuring that environmental changes do not compromise experimental accuracy.
4. High-precision environmental equipment adaptation: Core areas such as lithography, ion implantation, and wafer inspection—where temperature, humidity, and cleanliness are critically stringent—require the installation of advanced environmental control systems. These systems feature high-accuracy constant temperature and humidity units, delivering temperature stability within ±0.05°C and humidity control accuracy of ±1%. Paired with ULPA ultra-efficient filters (with a filtration efficiency of ≥99.999% at 0.12μm), additional localized clean benches or clean booths are deployed to elevate the local environmental cleanliness to ISO Class 4 (Grade 10), fully meeting the demands of ultra-high-precision experimental requirements.

(II) Media Supply System: Ensuring Stability and Reliability

1. High-purity gas system: Utilizing piped, centralized supply, the gas purity must meet or exceed 99.999%. The system is equipped with multi-stage filtration, pressure-regulating devices, and a leak detection system. Flammable gases (such as hydrogen) must be routed separately from oxidizing gases (like oxygen), maintaining a minimum separation distance of 0.5 meters.
2. Ultra-pure water system: Experimental water must meet the Grade 1 water standards specified in GB/T 6682-2022, with a resistivity of ≥18.2 MΩ·cm. It is achieved through multi-stage treatment processes including pretreatment, reverse osmosis, and EDI. Additionally, a circulating pipeline network is designed to prevent stagnant water, ensuring consistent water quality.
3. Chemical Supply System: Corrosive and toxic chemicals are transported via closed-loop piping systems, equipped with leak-proof trays, emergency shower stations, and eyewash facilities. The storage areas feature corrosion-resistant flooring and fume hoods, ensuring safe chemical handling and use.

(III) Power Distribution and Security Systems: Strengthening the Safety Defense Line

1. High-precision power distribution: A dual-circuit power supply system ensures uninterrupted power, while core equipment is equipped with UPS power supplies, keeping voltage fluctuations within ±1% to prevent equipment failures caused by unstable voltage. Additionally, an independent grounding system is installed, with grounding resistance kept below or equal to 1Ω, effectively shielding against electrostatic interference.
2. Comprehensive Security Measures: Install gas concentration detectors, fire alarm systems, emergency lighting, and evacuation signage. In explosion-proof areas, use explosion-resistant equipment and equip the space with an emergency ventilation system to ensure a rapid response in case of emergencies, minimizing potential losses.

III. Key Points for Construction Management: Details Determine Success or Failure

The construction phase requires strict control over process specifications and quality standards to prevent laboratory performance from being compromised by construction defects.

1. Cleanroom Construction Management: Construction personnel must undergo cleanroom training and, upon entering the cleanroom area, must change into designated protective attire and undergo air showering. Construction materials must meet cleanroom standards, avoiding those that easily generate dust or volatile substances. Additionally, any contaminants should be promptly removed during the construction process.
2. Pipeline Construction Specifications: Gas and liquid pipelines shall be made of stainless steel, and welding must be performed using argon arc welding to ensure airtight, leak-free connections. Pipeline installation must include预留 expansion and contraction space to prevent vibrations from compromising the sealing integrity of joints. Upon completion, pressure testing and leak detection shall be conducted.
3. Ground and Enclosure Construction: The cleanroom floor shall be finished with either epoxy resin self-leveling or PVC antistatic flooring, ensuring a flatness tolerance of ≤2 mm per meter. The enclosure structure will use color-coated steel panels, with seams properly sealed to prevent dust infiltration and air leakage.
4. High-precision equipment installation and commissioning: High-precision environmental control systems and core experimental equipment (such as lithography machines and etching machines) must be brought in after the cleanroom construction is completed. Prior to installation, a secondary cleaning process should be conducted in the designated area. During equipment installation, strict control measures must be implemented to manage vibration (vibration acceleration ≤ 0.1g) and ensure proper grounding. In particular, high-precision air conditioning units must be equipped with separate vibration-damping foundations to prevent operational vibrations from affecting other equipment. After installation, the equipment will undergo at least 72 hours of continuous operation and debugging to ensure that temperature, humidity, and cleanliness parameters remain stable and meet specified standards.

IV. Acceptance and Operations & Maintenance: Ensuring Long-Term Stable Operation

1. Strict acceptance criteria: Upon completion, cleanliness tests (including dust particle counting and settling bacteria testing), temperature and humidity accuracy checks, pipeline leak detection, and power distribution stability assessments must be conducted. Only when all indicators meet the specified standards can the facility be put into operation. In particular, for high-precision control areas, continuous environmental parameter monitoring over 7 days is required to ensure long-term operational stability of the equipment.
2. Normalized Operations and Maintenance Management: Establish a regular cleaning and filter replacement system for cleanrooms (HEPA filters replaced every 1–2 years, while ULPA filters are replaced annually); regularly inspect the operating parameters and consumable status of high-precision environmental control equipment, promptly calibrating sensor accuracy as needed; routinely check the pressure and integrity of gas and liquid pipelines, while continuously monitoring equipment performance metrics. Additionally, develop emergency response plans and conduct regular emergency drills to ensure the safe and stable operation of the laboratory.
   
   Recommended service provider: Nanjing Expansion Technology Co., Ltd.

   Under the demand for high-precision and highly compliant construction in semiconductor laboratories, Nanjing Kuozhan Technology Co., Ltd. stands out as a powerful and professional partner. Established in 1999, the company is a nationally recognized high-tech enterprise and a specialized "Little Giant" enterprise renowned for its innovation and excellence. For over 20 years, it has been deeply rooted in the field of specialized experimental environment engineering, dedicated to delivering comprehensive, lifecycle-integrated solutions—spanning "planning, design, construction, and operations"—tailored specifically for the semiconductor industry.

   Its core strengths align perfectly with the requirements for semiconductor lab construction: In terms of high-precision environmental control, the company’s independently developed SCIS high-precision environmental control equipment delivers temperature control accuracy as precise as ±0.002℃ and achieves ISO Class 1 cleanliness standards (with ≤10 particles ≥0.1μm per cubic meter), making it an ideal match for the stringent demands of critical processes like lithography and ion implantation. Additionally, the company adheres rigorously to authoritative domestic and international standards such as ISO 14644 and GB 50472, while holding comprehensive construction qualifications covering building MEP installation, electronics, and intelligent systems—ensuring zero-risk project acceptance.

1. Leveraging a multidisciplinary team of experts—including semiconductor process engineers and HVAC specialists—and backed by more than 3,000 laboratory project experiences, the company has served over 50 semiconductor industry enterprises, delivering several landmark projects. Notably, it completed the construction of a 3,000㎡ ultra-cleanroom for a leading micro- and nanotechnology platform, achieving temperature stability of ±0.1℃/h in the electron-beam lithography area. Additionally, the company provided a恒温 environment with precision control as tight as ±0.005℃ for a national large-scale scientific facility, a project that earned the prestigious "Magnolia Award" for Shanghai construction projects. Beyond this, the company has established an extensive nationwide after-sales service network comprising more than 30 locations, along with an intelligent operation-and-maintenance platform. This comprehensive infrastructure enables 365-day real-time monitoring, remote control capabilities, and regular inspection services, ensuring the long-term, stable operation of laboratories.