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High refractive index resin

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NTT-AT provides high refractive index resin of 1.6 or higher based on refractive index control technology and loss reduction technology, which are the base technologies for optical communication adhesives. In addition to adhesives for high-refractive-index glass and crystalline materials, it is expected to be used in fields such as optical recording, display, and light energy utilization, due to its high refractive index and excellent transparency.

Solvent-based high refractive index resin

Characteristic

Characteristics table

item conditions unit #18210
NH660
NH706
solvent - - PGME PGME PGME/PGMEA
Properties before curing viscosity E-type viscometer: 25 °C mPa s 15 5 4
Curing conditions Pre-bake - - 115°C 1min 120°C 1min 110°C 1min
UV irradiation amount UV lamp
: 365 nm intensity
-

100 mW/ cm2
300 seconds
(metal halide lamp)

300 mW/ cm2
180 seconds
(UV-LED light source)

300 mW/ cm2
90 seconds
(UV-LED light source)

Propertiesafter curing refractive index sodium d line λ=589 nm 1.725 1.710  
haze Thickness: 1 μm % < 0.1 < 0.1 < 0.1
Glass-transition temperature Dynamic viscoelasticity: tanδ max °C 100 125 195
transmittance

Thickness:1 μm
λ=450 nm
(including reflection loss)

% 94 94 90

The data are only measured values, not guaranteed values.

optical properties

Light transmittance: Indicates the light transmittance of a sample with a thickness of 1 μm. Values include return loss.

Optical transmittance #18210
Light transmittance of #18210
 
Optical transmittance NH660
Light transmittance of NH660
Optical transmittance NH706
Light transmittance of NH706

Application example

nanoimprint

This is a processing technology in which a stamper with a nanoscale uneven pattern is pressed against a resin-coated substrate and then heated or light-cured to transfer the uneven pattern to the resin.

It is attracting attention as a next-generation mass production technology because it can be processed easily and at a low cost compared to conventional nanoscale processing technology.

This resin is a nanoimprint resin with a high refractive index, and can be applied to fabricate functional precision patterns with a high refractive index.

p10019_11.jpg

Conceptual diagram of nanoimprint fabrication

Line and space_width45
line and space
Width: 45 μm, Depth: 100 nm
Line and space_width100
Line and space 100μm
Width: 100 μm, Depth: 100 nm
Pillar pattern
pillar pattern
Width: 0.5-5um, Depth: 350nm

Solvent-free high refractive index resin

Characteristic

Characteristics table

item conditions unit Acrylic epoxy
#18165 #18247 #6205 E3754
Properties before curing viscosity E-type viscometer: 25°C mPa s 9 138 20 1,200
Curing conditions UV irradiation amount UV lamp
: 365 nm intensity
metal halide lamp

10 mW/ cm2
600 seconds

100 mW/ cm2
60 seconds

100 mW/ cm2
300 seconds

10 mW/cm2
600 seconds
Propertiesafter curing refractive index sodium d line λ=589 nm 1.675 1.710 1.720 1.603
haze Thickness: 1 μm % < 0.1
(Thickness: 50 μm)
< 0.1
(Thickness: 50 μm)
< 0.1
(Thickness: 90 μm)
-
Glass-transition temperature Dynamic viscoelasticity: tanδ max °C 113 125 68 73
transmittance

Thickness:1 μm
λ=450 nm
(including reflection loss)

% 94 95 72 92
Shrinkage factor   % 9 7 8 5
hardness Shore D   D67 D78 D70 D76
adhesive strength  
kgf/cm2,
glass/glass
>48 - 35 >280

The data are only measured values, not guaranteed values.

optical properties

Optical transmittance #18247
Light transmittance of #18247
Samplethickness: 50 μm
Values include return loss
refractive index wavelength dependence
Refractive index of #18247

Application example

resin lens
thick film

About purchase

Outside of Japan, it may not be possible to sell in some countries due to laws and regulations related to chemical substances.
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