• Journal of Korean Port Research
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• v.8 no.1
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• pp.17-22
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• 1994

The wave interaction with flexible membrane such as PVC and fabrics is studied to prove its applicability to portable breakwaters. To obtain the wave exciting force acting on flexible membrane, eigen-function expansion method is employed. The effect of flexible is involved in body boundary condition in which x-directional displacement of membrane is obtained by solving the linear membrane equation. Displacement of membrane is assumed to be small compared to wavelength, therefore the tensile force of membrane remains constant. As the numerical examples, transmission and reflection coefficients according to the change of tensile forces are investigated. The hydrodynamic force on membrane, the dynamic tension in the mooring lines and the vertical displacement profile of membrane are also calculated. It is suggested that the flexible membrane can be used to engineering material for the future coastal/ocean applications.

• Electrical & Electronic Materials
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• v.21 no.9
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• pp.42-49
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• 2008

• Electrical & Electronic Materials
• /
• v.16 no.10
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• pp.23-28
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• 2003

• Electrical & Electronic Materials
• /
• v.16 no.10
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• pp.9-14
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• 2003

• Electrical & Electronic Materials
• /
• v.16 no.10
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• pp.3-8
• /
• 2003

• Electrical & Electronic Materials
• /
• v.27 no.11
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• pp.3-10
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• 2014

• Electrical & Electronic Materials
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• v.27 no.11
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• pp.11-19
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• 2014

• Electrical & Electronic Materials
• /
• v.27 no.11
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• pp.20-30
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• 2014

• The monthly packaging world
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• s.350
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• pp.53-60
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• 2022

• Journal of the Microelectronics and Packaging Society
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• v.23 no.1
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• pp.17-22
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• 2016

Flexible organic light-emitting diode (OLED) devices consist of multi-stacked thin films or layers comprising organic and inorganic materials. Due to thermal coefficient mismatch of the multi-layer films, warpage of the flexible OLED is generated during high temperature process of each layer. This warpage will create the critical issues for next production process, consequently lowering the production yield and reliability of the flexible OLED. In this study, we investigate the warpage behavior of the flexible OLED for each bonding process step of the multi-layer films using the experimental and numerical analysis. It is found that the polarizer film and barrier film show significant impact on warpage of flexible OLED, while the impact of the OCA film on warpage is negligible. The material that has the most dominant impact on the warpage is a plastic cover. In order to minimize the warpage of the flexible OLED, we estimate the optimal material properties of the plastic cover using design of experiment. It is found that the warpage of the flexible OLED is reduced to less than 1 mm using a cover plastic of optimized properties which are the elastic modulus of 4.2 GPa and thermal expansion coefficient of $20ppm/^{\circ}C$.