Photo Overcoat
Applications
Photo overcoat is applied in touch sensor a dielectric layer and a insulating layer. Photo overcoat contains good properties of insulation, adhesion, chemical resistance and hardness.
Features
- Optical properties: high transparency and good color hue
- Mechanical properties: good adhesion to bare glass, ITO and metal substrates; good hardness
- Electrical properties: excellent insulating properties
- Chemical properties: excellent chemical resistance
- Process window: easy to coat and high sensitivity
Specifications
| Product Name | POCA | Remarks | ||
|---|---|---|---|---|
| Features |
| |||
| Viscosity | cP | 4~7 | 25℃, 60rpm | |
| Transmittance at 400nm | % | >95 | UV visible | |
| Refractive Index at 633nm | - | 1.51~1.52 | ||
| Surface Resistivity | Ω/□ | 1 X 1014 | ||
| Dielectric Constant | 4.3 | 10KHz, 1V | ||
| Hardness | 3H | JIS pencil hardness | ||
| Remanent | % | 85±3.0 | 100mJ/cm2 THK ratio of before/after Post-Bake | |
| Recommend Process Conditions | Pre-bake | ℃ ; min | 90~110 ; 90 | |
| Exposure Energy | mJ/cm2 | 50-100 | ||
| Development | - | KOH | ||
| Post-bake | ℃; min | 220~240 ; 30 | ||