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OCR Overview


High viscosity type OCR

    Introduction to High viscosity type OCR

Application - Attaching cover glass to display panel.
- Attaching touch panel to display panel.
Bonding
process
• Stencil printing method
    Having high thixotropic index(~2.5)

Advantages - The quantity of over-flow and the thickness are controllable.

    Specification of High viscosity type OCR

▣ MRH3030T, 3232T, 3720T: High adhesive shear stress, low dielectric constant and good reliability(b*).
▣ Viscosity and thixotropic index are controllable.

Item Unit Reliability Test MRH3030T MRH3232T MRH3720T
Curing dosage
(@80%, LED 365nm)
mJ/㎠ - 1000 2000 1000
Curing dosage
(@95%, LED 365nm)
mJ/㎠ - 3500 3000 3000
Viscosity cPs - 10,000 20,000 45,000
Thixotropic index - - 4.8 2.7 2.8
Refractive index - - 1.47 1.48 1.48
Density g/cc - 0.9061 0.8862 0.9802
Density g/cc - 0.9340 0.9095 0.9943
Shrinkage % - 3.02 2.56 1.42
Hardness - - 56 48 30
Modulus Pa - 1.8E+04 7.2E+03 3.8E+04
Adhesive Shear Stress
(Glass to Glass)
Pa 0 hr 1.1E+06 1.2E+06 1.1E+06
500 hrs 1.2E+06 1.3E+06 1.1E+06
CTE(above Tg) ppm 0 hr 560 610 770
500 hrs 600 480 680
Dielectric constant - 0 hr 2.96 2.92 2.61
500 hrs 2.96 2.90 2.69
Refractive index - - 1.47 1.48 1.48
transmittance % 0 hr 98.2 99.6 99.0
500 hrs 98.1 99.3 98.9
Haze % 0 hr 0.03 0.03 0.01
500 hrs 0.05 0.07 0.01
Yellowish - 0 hr 0.01 0.02 0.01
500 hrs 0.04 0.07 0.21
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