EMI Shielded Windows

Series No. 3500

MAJR Products provides EMI Shielded Window (3500 series) solutions to many industries based on requirements for electromagnetic shielding, high light transmission, coatings for hardness, anti-glare, and other optical considerations. We do this across a range of substrates such as polycarbonate, acrylic, and even glass to provide the best combination of protection from electromagnetic and radio frequency interference and the visual requirements of your application. Most electromagnetic shielded window applications are custom by nature, and MAJR can assist you in your electromagnetic shielding window design. We will quote direct to your print or offer alternatives if requested.

Overview

MAJR Products provides EMI Shielded Window (3500 series) solutions to many industries based on requirements for electromagnetic shielding, high light transmission, coatings for hardness, anti-glare, and other optical considerations.

Product Features:

  • Built to Your Specification: MAJR’s engineering team can assist with custom EMI window designs to help meet your specific requirements. We’ve helped customers with designs ranging from small handheld devices to large military electronic cabinet doors. We look forward to helping you meet your shielding and optical requirements.
  • Superior Construction: Our materials and construction have been optimized to provide superior EMI/RFI shielding performance, optical clarity, and environmental durability. Hard Coatings are designed to provide polycarbonate windows with improved chemical, scratch, and abrasion resistance.

Optical Mesh Shield Media provides excellent EMI/RFI attenuation and optical performance. For mesh windows, standard mesh is 100 strands per inch and constructed from stainless steel wire that has been silver-plated and conductively blackened

Custom Product

Technical Information

Laminated Construction

MAJR’s proprietary laminating process allows us to embed 50,80, 100 and 230 OPI optical wire between polycarbonate and acrylic sheet stock allowing superior optical quality while still meeting demanding shielding requirements.

MAJR Products’ EMI shielded windows that provide protection from electromagnetic and radio frequency interference.

Conductive Busbar

Our busbar is applied to the perimeter of machined windows for conductivity / connectivity to a metal bezel or the metal case, faceplate, door.

MAJR Products’ EMI shielded windows that provide protection from electromagnetic and radio frequency interference.

Busbar options:

I–Shape: On outer edge of window only.

MAJR Products’ EMI shielded windows that provide protection from electromagnetic and radio frequency interference.

L–Shape: On outer edge of window & one surface.

MAJR Products’ EMI shielded windows that provide protection from electromagnetic and radio frequency interference.

U–Shape: On outer edge of window & two surfaces connecting.

MAJR Products’ EMI shielded windows that provide protection from electromagnetic and radio frequency interference.

Z–Shape: On outer edge of window & “step” & one surface.

MAJR Products’ EMI shielded windows that provide protection from electromagnetic and radio frequency interference.

On Edge Only – “I” Shape: Yes
Edge and 1 Surface – “L” Shape: Yes
Edge and 2 Surfaces – “U” Shape: Yes
Edge, Step and 1 Surface – “Z” Shape: Custom
Minimum Width: .07″

Optical Quality Blackened Stainless Steel and Copper Wire Mesh for EMI/RFI Shielded Windows

Silver Blackened Woven Woven Woven Woven Woven Woven
Plated Wire Mesh SS/BLK SS/BLK SS/BLK CU/BLK CU/BLK SS/BLK
Wire Diameter 0.0012″ 0.0012″ 0.0012″ 0.0022″ 0.002″ 0.0014″
Openings/Sq. in (OPI) 50 80 100 100 145 230
Visible Light (%)
Transmission 80% 65% 60% 58% 46% 34%
Reflectance 5-7% 5-7% 5-7% 5-7% 8-10% 5-7%
Shielding Effectiveness (dB)
40 MHz 54 56 60 65 70 72
200 MHz 70 70 72 72 78 84
600 MHz 54 60 66 76 76 78
1 GHz 44 50 56 56 66 72

Data presented above identifies single component parameters and is not to be stated as a pass/fail specification for a manufactured EMI/RFI shielded window.

Color: Clear (Standard) / Colors (Custom)
Surface Finish: Clear or Non-Glare Hard Coat
Light Transmission: 80% – 85% (Standard)
Mesh Angle: 22.5°, 30°, 45°, 90° Tolerance +/-5°

Machining Detail

Holes – Minimum Diameter: .07″
Countersink: Yes
Gasket Grooves: Yes
Gasket Groove Minimum Dimensions (wxd): .10″ x .10″
Radius – Minimum Internal or External: .04″
Other Details Available: Custom

Product Data Sheet

Product Options

ITO Conductive Coatings provide optical shielding for less demanding applications. A 10 ohms/sq. conductive coating will provide approximately 80% to 85% light transmission and 20-30 dB’s of EMI/RFI attenuation from 100 MHz to 1 GHz.