ADVANCED LINK PHOTONICS
A Leading Rugged Display Innovator
Effective ITO or Micro-Mesh EMI Shielding Window
Metal micromesh or
low resistance ITO conductive coating
ALP provides ITO-conductive glass and near-invisible micro-mesh solutions for integration as EMI shielding windows in sunlight-readable LCD applications. These shielding layers can be easily grounded using conductive tape or silver epoxy ink as bus bars.
Low Ohms ITO Conductive Glass
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Low-resistance ITO glass is also available for configuring effective EMI shielding windows according to customer requirements. The high reflectivity of ITO conductive coatings can be reduced using index-matching coatings, although this is a relatively costly process.
An alternative approach for integrating highly reflective ITO EMI windows is ALP’s patented Air-Gap Integration Technology, which enables precise control of reflections caused by the conductive ITO layer.
Key features of our ITO EMI windows are summarized below:
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Low resistance: 5–25 Ω/sq
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May be index-matched and/or AR-coated to reduce reflectance
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Compatible with ALP’s polarized touch panels for reduced reflectance
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EMI shielding effectiveness: >50 dB (1–1000 MHz)
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Wide operating temperature range: –40 to 90°C
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Available sizes: 2.5" to 62"
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Glass thickness: 0.7–8 mm
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Compatible with rugged resistive touch panel and heaters
Micro-Mesh EMI Shielding
ALP uses two types of micro-mesh for EMI shielding window integration in Display Head Assemblies (DHAs): etched micro-mesh and bare metal micro-mesh. Among these, integration of bare metal micro-mesh is generally more straightforward than etched micro-mesh, particularly when applied to polarized touch panel assemblies.
Bare metal micro-mesh consists of a substrate-free mesh sheet, enabling easy integration with a wide range of materials including glass, acrylic, plastic, retarders, polarizers, and touch panels. This allows ALP to provide EMI mesh shielding solutions with minimal optical impact and extremely low reflection.
Additional features of the bare blackened metal micro-mesh are listed below:
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Nonwoven, bare blackened nickel (Ni) mesh
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Mesh diameter: ~20 μm
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70 mesh per inch, resistance <1 Ω/sq
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Specular reflectance <1%
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Diffuse reflectance <0.1%
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High transmission: 88–90%, with no visible moiré interference
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Compatible with​ resistive touch panel and heaters
Bare blackened metal micro-mesh integrate on various substrates: glass, crylic, polarizer, retarder.
