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Home› Technical› Achieving ISO Class 5 with Modular Construction Technical Analysis · Semiconductor Cleanrooms Achieving ISO Class 5 with Modular Construction: A Semiconductor Cleanroom Approach Can a cleanroom that is built in a factory and assembled on site really hit the cleanliness a semiconductor process demands? This is a technical look at how a modular clean room reaches — and holds — ISO Class 5. Topics modular clean room portable cleanroom prefabricated clean room ≤3,520 / m³ Max particles ≥0.5 µm allowed at ISO Class 5 Unidirectional The airflow regime ISO 5 requires Factory-built Sealing and QC done under controlled conditions Weeks Typical site time versus months for stick-built By the Wonclean technical team Updated June 2026 ~7 min read There is a lingering assumption that “modular” means “lower spec” — fine for a workshop or a softwall enclosure, but not for the clean end of semiconductor work. In practice the opposite is true: the qualities that define ISO Class 5 — airtight sealing, precise airflow, controlled surfaces — are exactly the things a factory-built, prefabricated system can deliver more consistently than a build assembled in the open. This article sets out what ISO Class 5 actually requires, why modular construction is well suited to meeting it, and how a semiconductor-grade modular clean room is put together to reach and hold that standard. Modular, not compromised. A high-classification cleanroom built from a modular envelope — a continuous filter-and-light ceiling, sealed wall panels and a controlled floor, delivered as one engineered system. 01 — The target What ISO Class 5 actually demands ISO Class 5, defined by ISO 14644-1 and equivalent to the older “Class 100” and to EU GMP Grade A/B, allows no more than 3,520 particles of 0.5 µm or larger per cubic metre — around a thousand times cleaner than ordinary indoor air. Hitting that number is not about one heroic component; it is about four things working together: Unidirectional airflow. A near-continuous sheet of filtered air moving top-to-bottom, so particles are swept away from the work plane rather than mixed around the room. High filter coverage and air change. A ceiling largely filled with HEPA or ULPA filters, delivering a high, steady air-change rate. An airtight envelope. Walls, ceiling and joints sealed so unfiltered air cannot leak in and the pressure cascade holds. Controlled surfaces. Smooth, non-shedding, cleanable materials throughout, with no dust-collecting corners. Every one of these is a property of how precisely the room is built and sealed — which is where construction method starts to matter. 02 — The case for modular Why prefabrication suits high-classification cleanrooms Traditional “stick-built” construction assembles a cleanroom in place, trade by trade, often in a dusty, weather-exposed shell. A modular clean room inverts that: the panels, ceiling system, filters and services are manufactured to precise tolerances in a factory and as...
Home› Technical› ESD Control in Electronics Cleanrooms Technical Analysis · Electronics Cleanrooms ESD Control in Electronics Cleanrooms: Choosing Antistatic Wall and Sandwich Panels In electronics manufacturing, a charge you cannot feel can destroy a device you cannot see. This is a technical look at how the cleanroom envelope — its walls and panels — becomes part of the electrostatic-discharge control strategy. Topics cleanroom panels sandwich panel clean room walls <100 V Damage threshold for many modern semiconductor devices 10⁶–10⁹ Ω Typical static-dissipative surface-resistance window Two risks Device damage and particle attraction One path Every surface bonded to a common ground By the Wonclean technical team Updated June 2026 ~7 min read Electronics and semiconductor production is uniquely vulnerable to something invisible: static electricity. A static-discharge event far below the level a person can perceive can degrade or destroy a sensitive component, and a charged surface quietly pulls airborne particles toward the very products a cleanroom exists to protect. Controlling that charge is not only a matter of wrist straps and flooring — the walls themselves are part of the system. This article looks at why electrostatic discharge (ESD) matters so much in electronics cleanrooms, how surface behaviour is classified, and how to specify antistatic cleanroom wall and sandwich panels that contribute to control rather than working against it. The envelope is part of the system. Smooth, sealed cleanroom wall panels in an electronics environment — the large surfaces that surround sensitive work must dissipate charge, not store it. 01 — The core problem Why static is a double threat in electronics cleanrooms Static causes two distinct problems, and an electronics cleanroom has to solve both at once. The first is electrostatic discharge damage. Modern integrated circuits, sensors and printed assemblies operate at tiny voltages and feature geometries measured in nanometres. A sudden discharge — from a person, a tool or a charged surface — can puncture insulation layers or fuse conductors. Many devices are damaged by events under 100 volts, well below the roughly 2,000 volts a person needs before they feel a shock. The damage is often latent: the part survives the line and fails in the field. The second problem is electrostatic attraction. A charged surface acts like a magnet for airborne particles, pulling them out of the airflow and holding them where they can settle on a wafer or board. In a room engineered to keep particles moving and away from the product, a charged wall does the opposite. Both problems point to the same requirement: surfaces should let charge bleed away to ground in a controlled way, instead of building it up. 02 — The science Conductive, dissipative, insulative: what the numbers mean ESD behaviour is described by surface resistance, measured in ohms and grouped into bands by standards such as IEC 61340-5-1 an...
Home› Technical› Cleanroom Standards Across Southeast Asia: Mobile & Containerized Labs Technical Analysis · Regional Deployment Cleanroom Standards Across Southeast Asia: Deploying Mobile and Containerized Laboratories ASEAN runs on one particle standard but many national regulators — in a climate that fights you the whole way. This is a technical look at how mobile and containerized cleanroom labs meet those rules, and survive the tropics. Topics mobile cleanroom containerized laboratory modular laboratory ISO 14644-1 The particle-count baseline used across every ASEAN market PIC/S GMP scheme that most ASEAN drug regulators now follow >80% RH Wet-season humidity a tropical lab’s HVAC must overcome Weeks Typical site time for a factory-built containerized lab By the Wonclean technical team Updated June 2026 ~8 min read A cleanroom in Penang, Ho Chi Minh City or Jakarta faces a problem its counterpart in a temperate country never does: it must hit the same internationally recognised cleanliness numbers while sitting in 32 °C heat and humidity that can pass 80% for months at a time — and it usually has to be up and qualified far faster than a conventional build allows. For many companies expanding across Southeast Asia, the answer is to stop building cleanrooms on site and start delivering them: mobile and containerized laboratories that are manufactured, fitted out and pre-tested in a factory, then shipped and connected. This article covers the regulatory baseline these labs must meet across ASEAN, the climate they have to defeat, and how a containerized design is actually put together to do both. A laboratory you deliver, not pour. A Wonclean containerized cleanroom complex: standard transport modules joined on site into a single sealed lab, with the HVAC and filtration built in before it ships. 01 — The standards baseline One particle standard, many national regulators The good news for anyone deploying across the region is that the core technical yardstick is universal. Cleanliness is classified everywhere by ISO 14644-1, which sets the maximum airborne-particle counts per cubic metre for each ISO class. A lab specified to ISO Class 7 in Malaysia is, technically, the same target as ISO Class 7 in Vietnam. That shared baseline is what makes a standardised, factory-built lab viable in the first place. The complication is regulatory, not technical. For pharmaceutical and medical work each country enforces its own Good Manufacturing Practice (GMP) regime through its own authority — and most, but not all, have aligned those regimes to the PIC/S GMP guide, which in turn tracks EU GMP including the demanding Annex 1 for sterile products. The practical effect is that the cleanroom hardware can be common, while documentation, qualification and inspection expectations vary by market. Primary medicines regulators in major ASEAN markets. Always confirm current requirements directly with the relevant authority before a project. Market Regulator...
Home› Technical› Unidirectional Airflow Ceilings for ISO Class 5 Semiconductor Cleanrooms Technical Analysis · Semiconductor Cleanrooms Designing Unidirectional Airflow Ceilings for ISO Class 5 Semiconductor Cleanrooms In a wafer fab the ceiling is not a finish — it is the air supply. This is a technical look at how the ceiling plane delivers the vertical unidirectional flow that an ISO Class 5 process demands, and what that means for grid, filters and floor. Topics modular cleanroom cleanroom ceiling T-bar ceiling 0.30–0.50 m/s Typical downward face velocity for unidirectional ISO 5 flow ≤3,520 / m³ Max particles ≥0.5 µm allowed in ISO Class 5 ULPA U15 Filter grade often specified for critical lithography zones ≥80% Ceiling filter coverage typical of full unidirectional flow By the Wonclean technical team Updated June 2026 ~8 min read In most buildings the ceiling closes a room off. In a semiconductor cleanroom it does the opposite: it is the surface through which clean, conditioned air enters, and it sets the airflow pattern that keeps sub-micron particles away from the wafer. Get the ceiling wrong and no amount of gowning, filtration capacity or floor cleaning will recover an ISO Class 5 environment. This article looks at the ceiling as an engineered air-delivery system for advanced electronics manufacturing: why unidirectional (laminar) flow is non-negotiable at ISO 5, how the filter-and-grid plane is built to deliver it, how the return path through a raised floor closes the loop, and the contamination and static issues that are specific to the ceiling itself. Vertical unidirectional flow in practice. A high-classification cleanroom built by Wonclean: a full filter ceiling supplies air that travels straight down and exits through a perforated raised floor, sweeping particles away from the work plane. 01 — The core requirement Why ISO Class 5 forces a unidirectional ceiling Cleanliness classes from ISO 14644-1 cap the number of airborne particles allowed per cubic metre. At ISO Class 5 the limit is 3,520 particles ≥0.5 µm per cubic metre — roughly a thousand times cleaner than a well-run office. A single fingerprint-sized burst of contamination near a lithography or etch step can scrap a wafer, so the air at the work plane has to be continuously replaced before particles can settle. Turbulent, mixed-flow ventilation — the scheme used in lower-grade rooms and in most of a typical modular cleanroom — dilutes contamination but cannot guarantee it is swept away from a specific point. ISO Class 5 and cleaner processes therefore rely on vertical unidirectional flow: a uniform sheet of filtered air moving top-to-bottom across the whole room at a steady velocity, typically 0.30–0.50 m/s. To produce that sheet, the ceiling cannot be a few scattered diffusers; it has to become an almost continuous filter plane. This is the first design consequence that separates a fab cleanroom from a general one: the ceiling, the filtration and the floor retu...
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WONCLEAN Cleanroom Solution Supplier Request a quote Industry Report · 2026 Edition Top 10 Cleanroom Suppliers in China for 2026 — Industry Rankings and the Case for Wonclean China builds more cleanroom floor area than any country on earth. This report sizes the market, explains how serious buyers evaluate cleanroom suppliers, compares ten relevant Chinese cleanroom companies, and looks closely at where Wonclean Technology Company Limited fits in modular cleanroom and prefabricated laboratory projects. ¥240.7B China cleanroom engineering market, 2022, approximately US$36B 15.4% Market CAGR, 2016–2022 38.2M m² New cleanroom area built in 2022 ¥359.6B Projected market size by 2026 By the Wonclean Technology Company Limited editorial team Updated June 2026 About 22 min read If you are sourcing a modular cleanroom in 2026 — for a semiconductor line, a sterile pharmaceutical suite, a battery dry room, a food packaging hall, or a research laboratory — China is almost certainly on your shortlist of where to buy. The country is the largest single market for cleanroom construction in the world, home to both large cleanroom engineering integrators and specialised manufacturers that deliver cleanroom panels, FFU ceiling grids and laboratory systems. This guide keeps the comparison practical. It first reviews the market data, then explains how buyers should evaluate suppliers, presents a ranked list of relevant Chinese cleanroom suppliers, and finally profiles Wonclean Technology Company Limited as a manufacturer-led cleanroom solution supplier with prefabricated laboratory, cleanroom wall panel, ceiling system, HPL panel, HVAC material and clean equipment capabilities. What this report covers Market overview Supplier criteria Top 10 cleanroom suppliers in China Spotlight: Wonclean Technology Company Limited Advantage 1 — Yangtze River Delta base Advantage 2 — Product quality and service Advantage 3 — Modular cleanroom expertise Advantage 4 — Projects and global clients A buyer's checklist Frequently asked questions 01 — Market overview China's cleanroom market in 2026 Cleanroom construction supports advanced manufacturing, pharmaceuticals, medical devices, food production, precision instruments, electronics and new energy. In these industries, a controlled environment is not a decorative building feature; it is a process-control asset that protects product quality, particle control, hygiene and production stability. Industry research cited in the Chinese financial press estimates China's cleanroom engineering market at roughly ¥240.7 billion in 2022, with historical growth of around 15.4% from 2016 to 2022. By 2026, the market is projected to approach ¥359.6 billion. These figures explain why China remains one of the most important sourcing markets for cleanroom suppliers. China cleanroom engineering market size Market value in ¥ billion, with 2026 projection 0 1200 2400 3600 ¥88.6B ¥240.7B ¥359.6B 2016 2022 2026F projected Source: industry research summari...
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