1. Raw Water Sources, Typical Contaminants & Water Quality Characteristics
Raw water for Semiconductor Ultrapure Water (UPW) systems is typically sourced from municipal water supplies or on-site groundwater. The produced ultrapure water is used in critical semiconductor manufacturing processes, including wafer etching, thin-film deposition, chemical mechanical planarization (CMP), wafer cleaning, photolithography, and other advanced fabrication processes, where water quality directly impacts device yield and product reliability.
Typical contaminants in raw water include calcium and magnesium hardness ions, suspended solids, colloidal particles, residual chlorine, sulfates, silicates, and trace heavy metals. Depending on the water source, trace microorganisms and Total Organic Carbon (TOC) may also be present.
Semiconductor UPW systems require one of the highest water quality standards in modern manufacturing. Virtually all dissolved ions, suspended particles, microorganisms, and organic contaminants must be removed. Product water is required to achieve an electrical resistivity of 18.25 MΩ·cm, while particulate contamination, TOC, silica, and trace metal ions must be controlled to extremely low levels.
Compared with ultrapure water systems used in photovoltaic, lithium battery, or other industrial applications, semiconductor UPW systems demand significantly higher water purity, exceptional operational stability, and uninterrupted continuous performance.
2. Common Customer Challenges
The primary challenge in semiconductor ultrapure water production is maintaining consistently stable water quality at extremely high purity levels.
Fluctuations in raw water quality can directly affect resistivity, silica concentration, and trace ion levels, potentially reducing wafer yield and increasing production defects.
Conventional industrial pure water systems typically lack sufficient purification capability to completely remove trace ions, dissolved organics (TOC), and ultrafine particles, making them unsuitable for advanced semiconductor manufacturing processes.
In addition, filter cartridges, ion exchange resins, and membrane elements are susceptible to fouling and performance degradation, resulting in frequent maintenance shutdowns that interrupt continuous production.
Standard equipment often utilizes piping systems and storage tanks with insufficient corrosion resistance or cleanliness, increasing the risk of secondary contamination caused by material leaching.
As semiconductor fabs continue to expand and process technologies rapidly evolve, conventional fixed-design water treatment systems offer limited flexibility for plant upgrades and capacity expansion. Manufacturers increasingly require highly customized, scalable, and internationally compliant UPW systems specifically designed for advanced semiconductor fabrication.
3. Treatment Process & Core Equipment Configuration
To satisfy the stringent water quality requirements of semiconductor manufacturing, we employ a proven multi-stage UPW production process consisting of:
Pretreatment → Double-Pass Reverse Osmosis (RO) → Electrodeionization (EDI) → Mixed-Bed Polishing → Final Precision Filtration
Raw water first undergoes pretreatment through multimedia filtration, activated carbon filtration, and precision cartridge filtration to remove suspended solids, residual chlorine, colloidal contaminants, and large organic molecules.
The pretreated water then passes through a double-pass reverse osmosis (RO) system to remove the vast majority of dissolved salts, silica, and metal ions.
An advanced Electrodeionization (EDI) system continuously removes remaining ionic contaminants without chemical regeneration, eliminating the risk of secondary contamination associated with conventional ion exchange regeneration.
Finally, a polishing mixed-bed ion exchange system together with terminal ultrafiltration produces ultrapure water with a stable resistivity of 18.25 MΩ·cm, fully meeting the requirements of advanced semiconductor manufacturing processes.
Core equipment includes:
- Fully automatic pretreatment systems
- Double-pass anti-fouling reverse osmosis units
- EDI ultrapure water systems
- Polishing mixed-bed ion exchange units
- Terminal precision filtration systems
- Intelligent electrical control systems
- High-precision online water quality monitoring instruments
4. Solution Advantages
This solution is specifically designed for advanced semiconductor manufacturing processes and consistently produces ultrapure water that complies with the highest industry standards.
Critical water quality parameters—including TOC, particulate contamination, silica, and trace metal ions—are precisely controlled to maximize wafer yield and manufacturing reliability.
We provide fully customized engineering solutions based on cleanroom layout, process technology node, production capacity, and raw water characteristics. High-purity corrosion-resistant piping, compact skid-mounted equipment, and modular expansion designs effectively eliminate secondary contamination while accommodating future capacity upgrades.
All core equipment, electrical control systems, and water treatment components are certified to CE, UL, and ISO standards, ensuring compliance with international safety regulations and semiconductor manufacturing requirements worldwide.
The multi-stage purification process incorporates intelligent water quality monitoring and automatic process control, providing excellent resistance to raw water fluctuations while extending the service life of membranes, resins, and filtration components.
The modular integrated design minimizes installation space requirements, enables rapid deployment, and provides outstanding flexibility for semiconductor fab expansion and process upgrades.
5. Project References & Supporting Documentation
We have successfully delivered semiconductor ultrapure water systems for multiple wafer fabrication facilities and semiconductor assembly and testing plants.
A representative project is a 12-inch Advanced Semiconductor Fab Ultrapure Water (UPW) System, where product water consistently maintains an electrical resistivity of 18.25 MΩ·cm, fully complying with the highest semiconductor ultrapure water specifications.
The system has demonstrated reliable year-round continuous operation, supporting stable high-volume semiconductor production while successfully passing both factory acceptance testing (FAT) and industry compliance inspections.
Supporting documentation includes:
- Proprietary semiconductor UPW process patents
- CE, UL, and ISO certification certificates
- Third-party accredited water quality testing reports
- Project completion and acceptance documentation
- Performance references from benchmark semiconductor projects
6. Service Scope & Cooperation Process
We provide comprehensive EPC turnkey solutions for semiconductor ultrapure water systems, covering site investigation, raw water quality analysis, customized process engineering, non-standard equipment design and manufacturing, installation, commissioning, system validation, operation and maintenance services, system upgrades, and lifetime consumables supply.
Standard Cooperation Process
- Site Survey & Raw Water Analysis – Conduct on-site investigation, collect water samples, and provide a comprehensive raw water quality assessment report.
- Customized Engineering Design – Develop a dedicated UPW system solution, equipment configuration, and commercial proposal based on semiconductor process requirements.
- Equipment Manufacturing & Construction – Begin customized equipment fabrication and on-site installation following contract confirmation.
- Installation, Commissioning & System Validation – Complete system installation, parameter calibration, and continuous trial operation until all water quality specifications are consistently achieved.
- Project Acceptance & Technical Training – Assist with project acceptance procedures and provide comprehensive operator training.
- Long-term Technical Support – Deliver preventive maintenance, routine inspections, system optimization, performance upgrades, and lifetime technical support.
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