Electromagnetic wave shielding film is also called EMI (Electromagnetic Interference) protective film or absorbing material.
The current range of materials for use as RFI (RF Interference) shielding include conductive metal oxides, metal meshes, and nanowires materials.
Our EMI shielding film is mainly used to reduce or eliminate electromagnetic interference and RF Interference on the internal circuit of the product by pressing on the film after the copper material is etched and processed.
A flexible, thin, lightweight electromagnetic wave shielding film with excellent electromagnetic wave shielding properties. It is used to prevent malfunctioning of medical devices, ships, aircraft, and other precision equipment in the surrounding environment.
EMI/RFI Shielding film provide efficient electromagnetic shielding and an optimal transparency (Visible light transmittance >80%).
The copper mesh included on the EMI/RFI shielding film provided a great alternative to the ITO shielding (better resistance and conductivity). Indeed, the ITO technology is based on the metallization of a support with a really thin layer. This technology offers a lower conductivity, less transparency and a high risk to oxydation. That is why we prefer to propose this EMI shielding film based on the Cu Mesh principle.
| Item | Unit | Product Features | Check methods | Remark | ||
| Product number | / | CNE******EMI-V*.* | / | / | ||
| Stackup | Upper protection layer | µm | 50 | Micrometer | PE | |
| Cu mesh layer | µm | 2 | Surface blackening | |||
| Base film | µm | 100 | PET | |||
| Bottom protection layer | µm | 50 | PET | |||
| Mesh pattern | / | 45 degree diagonal square | / | / | ||
| Space of mesh | µm | 200 | Quadratic | 2X | ||
| Line width of mesh | µm | 9±3 | 2X | |||
| Transparence | % | ＞80% | Spectrophotometric colorimeter | 550nm | ||
| Sheet resistance of mesh | Ω/□ | 0.2～0.4Ω | Four point probe | / | ||
| Adhesion between PET and Cu | / | 5B | Baguette test | / | ||
| Reliability | High temperature and high humidity resistance change rate | % | ≤10 |
Constant temperature and humidity Experimental chamber |
Temperature 85℃, humidity 85℃, 500H | |
| High temperature and high humidity permeability rate of change | % | ≤10 | ||||
| High temperature and high humidity resistance change rate | % | ≤10 | UV aging chamber | Light source UVA-340. Irradiation intensity: 0.89W/m2@320nm. Black standard temperature: (70±2)℃. Irradiation mode: full time irradiation |
||
| High temperature and high humidity resistance change rate | % | ≤10 | ||||
The product is made of Protective Film (PE) + Blackened Layer + Cu Layer + Material Layer (PET) + Protective Film (PET).
◆ Hospitals (shielding of NMR, EMG and EEG equipment)；
◆ Shielding of development laboratories in industry；
◆ Data security of computers；
◆ Shielding of executive rooms (prevents spying by microphones or electronic bugs outside the building)；
◆ Shielding against stray electromagnetic radiation；
◆ Electronic signal shielding for consumer electronics (smartphones, tablets, touch panels, digital cameras,LCD TVs, etc.).
High and low temperature test
The industry standard is: -30°C to +70°C, our Metal Mesh can reach -85°C to +85°C, and it can be used normally in extreme environments;
Environmental test: The test product functions normally at -80°C, 100°C (boiling water), and -235°C.
Cyclic bend test
Bending degree: from 0~90~180 degrees (cyclic bending), bending diameter: 4mm, 8mm;
After cycling 10k, 50k and 200k times, the resistance value of the display channel did not change.
Loop folding test
When the bending diameter is ≤4mm, and the bending angle is folded from 20 degrees to 180 degrees, the metal mesh can be used normally, and the folding touch can be realized.
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