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