Transparent Electromagnetic Shielding Film Utilizing Imprinting-Based Micro Patterning Technology

Area of Science:

• Materials Science
• Electrical Engineering
• Nanotechnology

Background:

• The proliferation of smart mobile devices has driven component integration, leading to increased electromagnetic interference (EMI).
• Existing EMI shielding methods using conductive materials lack transparency and flexibility, which are crucial for modern electronic applications.
• There is a growing need for advanced EMI shielding solutions that are both transparent and flexible.

Purpose of the Study:

• To fabricate a novel transparent and flexible EMI shielding material.
• To investigate the impact of pattern structure and conductive binder coating thickness on shielding properties.
• To achieve mass production viability through UV imprinting technology.

Main Methods:

• Fabrication of a film with an intaglio pattern using ultraviolet (UV) imprinting technology.
• Filling the intaglio pattern with a conductive binder.
• Analysis of shielding characteristics based on aperture ratio and pattern structure.
• Optimization of conductive particle coating thickness to tune transmittance, conductivity, and EMI shielding rate.

Main Results:

• A square pattern design was optimized and implemented using UV imprinting.
• The film's transmittance, conductivity, and EMI shielding rate were successfully tuned by adjusting the conductive binder coating thickness.
• The developed material demonstrated effective EMI shielding performance suitable for electric and electronic applications.

Conclusions:

• The study successfully developed a transparent, flexible EMI shielding material with potential for mass production.
• The material meets the performance requirements for EMI shielding in electronic devices.
• This innovation addresses the need for advanced shielding solutions in the rapidly evolving smart mobile industry.