Product
LCD Materials
LCD Materials
Alignment Layer
Applications |
The alignment layer made of polyimide is used to control the orientation and pre-tilt angle of liquid crystals. Our alignment layers are designed for TN or VA modes that provide wide processing margins for LCD manufacturers and ensure excellent performance of LCD panels. After a rubbing process, the TN alignment layer creates and imprints a series of parallel microscopic grooves into a film substrate. In both VA or TN modes, polyimide within the alignment layers forces liquid crystal molecules between the alignment layers to turn in a twisting motion.
Features |
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TN-PI |
VA-PI |
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Specifications |
Product Name | RA-706X | RA-900X | Remarks | ||
Field of Application | TN-LCD | PSA-LCD | |||
Features |
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Viscosity | cP | 22~30 | 6~25 | ||
Non-Volatile Matter Content | % | 5.5~6.5 | 3.0~7.0 | ||
Water Content | ppm | < 4,000 | < 4,000 | ||
Ionic Impurities Content | ppb | < 500 (Na, K, Cu, Fe) | < 500 (Na, K, Cu, Fe) | ||
Process Conditions | Soft-Bake | °C; min | 65~70 ; 2 | 70~90 ; 2 | |
Hard-Bake | °C; min | 220 ; 17~25 | 210~230 ; 30~60 | ||
Pre-tilt Angle | ° | 3~6 | > 89 | ||
Voltage Holding Ratio | % | > 96 | > 90 | 1V, 0.6Hz, 60°C | |
Ion Density | pC | < 200 | < 1000 | Instec (10V, 0.01Hz, 60°C) | |
Residue DC | mV | < 800 | < 100 | Soaking 5VDC, 3600 sec, 60°C | |
Volume Resistivity | Ω.cm | 1011~1013 | > 1013 | 10K Hz |