# Application of Air Filtration in Display Panel Factories

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> Last updated: 2026-09-23 19:09:53
Contents
- **01**1. Principles of Air Filtration Applications
- **02**Typical Impacts of Airborne Contaminants on Display Panels
- **03**2. Technical Pathways for Solutions
- **04**3. Outcomes & Value
- **05**4. Challenges & Optimization Directions
- **06**5. Conclusion

Display panel manufacturing (LCD, OLED, Micro-LED, etc.) is one of the industries with the most stringent requirements for air cleanliness, in some aspects even surpassing semiconductor fabrication. Due to the large panel size, even minor defects can cause an entire panel to be scrapped or downgraded, directly impacting yield and profitability.

Whalesens Technology has long been dedicated to air filtration and cleanroom control, providing complete solutions for air filters and AMC (Airborne Molecular Contaminants) control to help the display panel industry achieve high yield and sustainable operations.

![Application of Air Filtration in Display Panel Factories](/storage/posts/2509/191758296007794221.png)

## 1. Principles of Air Filtration Applications

Preventing particulate contamination: Avoiding dead pixels, bright/dark spots, and non-uniform display issues.

Controlling AMC molecular contamination: Including siloxanes, VOCs, acidic/alkaline gases, which can cause optical haze, corrode electrodes, and accelerate OLED material degradation.

Meeting ultra-high cleanroom standards: ISO Class 5–3, and Class 1 in certain critical process steps.

Protecting precision equipment: Reducing contamination risks for high-value tools such as lithography, evaporation, and CVD/PVD equipment.

## Typical Impacts of Airborne Contaminants on Display Panels

| Contaminant Type | Main Source | Typical Impact |
| --- | --- | --- |
| Particulates | Air / Personnel / Materials | Dead pixels, bright/dark spots |
| AMC (acidic gases) | Process chemicals | Corrosion of ITO/electrodes |
| VOCs | Adhesives, materials | OLED organic layer aging, optical haze |
| Moisture/Ions | Environmental ingress | Instability of quantum dots |

## 2. Technical Pathways for Solutions

### (1) Large-Scale HVAC Cleanroom Systems

MAU (Make-Up Air Units) and RAU (Recirculation Air Units) with multi-stage filtration (pre, medium, high efficiency).

Chemical filtration modules: Activated carbon + specialty adsorbents for graded removal of acids, bases, and organics.

![(1) Large-Scale HVAC Cleanroom Systems](/storage/posts/2509/191758296071537356.png)

### (2) Terminal FFUs + ULPA Full Coverage

Use of ULPA filters (U15/U16/U17).

Creation of unidirectional laminar flow, rapidly sweeping away contaminants.

FFU deployment can exceed tens of thousands of units, covering core clean zones.

### (3) AMC (Airborne Molecular Contaminant) Control

Integrated chemical filtration FFUs: Removing both particles and AMC at the terminal stage.

POU (Point-of-Use) filtration: Additional chemical filters for sensitive tools like lithography or evaporation systems.

Source control: Comprehensive management of building materials, equipment, and personnel garments.

![(3) AMC (Airborne Molecular Contaminant) Control](/storage/posts/2509/191758296143527788.jpg)

### (4) Equipment Micro-Environments & Transfer Filtration

ULPA filters inside process equipment, maintaining local cleanliness levels higher than the cleanroom.

Substrate transport carriers with clean air or nitrogen purging, preventing contamination during transfer.

### (5) Testing & Maintenance

PAO scanning: Ensures no leaks in ULPA/HEPA filters.

AMC online monitoring: Using IMS, CRDS-APIMS for real-time detection.

Efficient maintenance system: Smart monitoring + scheduled filter replacement.

## 3. Outcomes & Value

Maximized yield: Reduced pixel defects and display non-uniformities.

Support for advanced processes: OLED and Micro-LED mass transfer require extreme cleanliness.

Product performance assurance: Improved brightness uniformity, color accuracy, and lifespan.

Process stability: Reduced environmental variability.

ISO Class 3–5 compliance, with localized ISO Class 1 in critical steps.

## 4. Challenges & Optimization Directions

High cost: Significant CAPEX + OPEX.

Energy consumption: FFU systems account for large power usage.

AMC control complexity: Multi-source, multi-path contamination risks.

Maintenance workload: Continuous monitoring and replacement cycles.

## 5. Conclusion

Air filtration applications in display panel factories represent the pinnacle of cleanroom and air purification technology.

By combining ULPA-grade particle filtration with multi-stage chemical filtration, manufacturers can effectively control airborne particulates and AMC, ensuring mass production quality for high-resolution display panels.

**Whalesens Technology** is committed to providing one-stop air filtration and cleanroom solutions for display panel factories, enabling high yield while reducing energy consumption and operating costs.

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