Does LCD screen production need to use air compressor

A formal description of the application of air compressors in the manufacture of LCD screens

in the precision manufacturing process of liquid crystal display panels, the compressed air system, as a key infrastructure, plays an important role in ensuring the stable operation of the process and maintaining a clean production environment. After comprehensive industry practice and technical specifications, the specific application of air compressor in LCD screen manufacturing is as follows:

power guarantee of 1. process equipment
pneumatic drive technology is widely used in the whole process of LCD production, and the air compressor provides the basic power source for the following core equipment:

1. automated material transfer: In the handling process of the array glass substrate and the color film substrate, the vacuum suction cup realizes accurate grasping and release through compressed air.
2. Precision coating process: In the alignment film coating, photoresist spraying and other links, pneumatic diaphragm pump relies on a stable gas source to achieve high-precision flow control.
3. Operation of detection equipment: the lens switching of the optical detector and the action execution of the defect marking device are all driven by pneumatic components.

2. clean environment maintenance system
LCD screen production of air cleanliness requirements up to ISO level 1 standards, compressed air system through multiple purification treatment to build a clean security system:

1. positive pressure environment maintenance: continuous delivery of high-efficiency filtered compressed air to the clean room to form a micro-positive pressure barrier, effectively blocking the intrusion of external particles.
2. Process gas purification: in sputtering coating, chemical vapor deposition and other processes, the compressed air treated by dehumidification, deoiling and particle removal is used as the carrier gas.
3. Internal purging of the equipment: use special clean compressed air to clean the exposure machine, developing machine and other precision equipment regularly to avoid particle deposition.

3. special process support
in the key process of LCD screen manufacturing, compressed air plays an irreplaceable role:

1. liquid crystal dripping process: The compressed air pressure is controlled by a precision pressure regulating device to realize high-precision quantitative dripping of liquid crystal materials.
2. Polarizer attachment: In a constant temperature and humidity environment, the roller is driven by compressed air to complete the close adhesion between the polarizer and the glass substrate.
3. Static elimination: In the preparation process of the thin film transistor array, the compressed air is sprayed by the ion air gun to eliminate the accumulation of static charge.

4. Quality Assurance Requirements
compressed air systems for LCD production shall meet the following technical standards:

1. cleanliness standard: dust content ≤ 0.1 microns/m3, oil content ≤ 0.003 mg/m3, dew point temperature ≤-40 ℃.
2. Pressure stability: The system pressure fluctuation range is controlled within ± 0.02MPa to ensure the process repeatability of precision coating equipment.
3. Microbial control: in the sterile packaging area, the compressed air should be treated through a sterilization filter to ensure that the microbial limit is ≤ 1CFU/m & sup3;.

It is recommended that LCD manufacturers establish a special management system for compressed air systems, including standard operating procedures such as equipment spot inspection, filter element replacement, and quality inspection. Every quarter, professional institutions are entrusted to carry out compressed air quality inspection, and monitoring files of key indicators such as dust content, oil content and dew point temperature are established to ensure that the compressed air system always meets the stringent requirements of LCD screen production.