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.
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.
Busbar options:
I–Shape: On outer edge of window only.
L–Shape: On outer edge of window & one surface.
U–Shape: On outer edge of window & two surfaces connecting.
Z–Shape: On outer edge of window & “step” & one surface.
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