Majr Products provides a range of defined polycarbonate laminates that can be machined, bus barred and gasketed to meet your optical and EMI/RFI Shielding requirements within a short lead-time without compromising quality or performance.
- EMI/RFI Shielded Window Properties – the 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. Hard coatings are applied in a class 10000 clean room via a permanent, high durability UV curing process. Hard coatings are tested for chemical abrasion resistance using ASTM-D-1308 and for abrasion resistance using ASTM-D-1044.
- Antiglare hard coatings diffuse surface reflections but still maintain very good uniformity and image resolution for electronic display applications. The standard antiglare hard coating measures 60 gloss units via ASTM-D-523 using a gloss meter at 60 deg.
- Antireflective hard coatings improve light transmission and reduce reflection of polycarbonate windows. The antireflective coatings are broad band vapor deposited coatings which reduce surface reflections to less than 0.75% over the visible spectrum. The antireflective coatings are deposited over a clear or antiglare hard coating to combine improved durability with enhanced optical performance.
- Optical Fine Wire (OFW) or MEM-100 printed mesh provide excellent EMI/RFI attenuation and optical performance. Standard OFW mesh is 80 strands per inch and constructed from 0.0011” stainless steel wire that has been silver plated and conductively blackened. Resistance of the OFW or MEM-100 mesh is <0.05 ohms/sq. and light transmission is 75% to 80%.
- 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.
- Quality – laminated panels are manufactured, inspected and tested to the S113 specification or as required by the customer.
Technical Information*
Dimensions (Industry Standards, Custom Available)
|
Laminate Thickness
|
Thickness Tolerance
|
Minimum Part Size
|
Maximum Part Size
|
Tolerance up to 200mm
|
Tolerance >200mm to 400mm
|
Tolerance >400mm to 650mm
|
Tolerance
on Parts >650mm
|
Square
Edge
Profile?
|
Step Edge Profile?
|
| 1.5mm |
(+/-) 0.2mm |
6.0mm |
400mm x 300mm |
(+/-) 0.2mm |
(+/-) 0.3mm |
NA |
NA |
Yes, Available |
No, |
| 2.0mm |
(+/-) 0.2mm |
6.0mm |
480mm x 650mm |
(+/-) 0.2mm |
(+/-) 0.3mm |
(+/-) 0.5mm |
NA |
Yes, Available |
Yes, Available |
| 3.0mm |
(+/-) 0.3mm |
6.0mm |
700mm x 1100mm |
(+/-) 0.2mm |
(+/-) 0.4mm |
(+/-) 0.5mm |
(+/-) 1.0mm |
Yes, Available |
Yes, Available |
| 4.0mm |
(+/-) 0.4mm |
6.0mm |
700mm x 1100mm |
(+/-) 0.2mm |
(+/-) 0.5mm |
(+/-) 0.5mm |
(+/-) 1.0mm |
Yes, Available |
Yes, Available |
Machining Detail
Holes – Minimum Diameter: 2.0mm
900 Countersink: Yes
Gasket Grooves: Yes
Gasket Groove Minimum Dimensions (wxd): 3.0 x 0.3mm
Radius – Minimum Internal or External: 1mm
Other Details Available: Custom
Optical Specifications
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°
Cosmetics: ISO 9001:2000 Visual Inspection Procedure
Busbar – All Thicknesses
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: 2.0mm
Busbar Conductivity: <0.2 ohms/100mm
Silver Epoxy Busbar
Silver epoxy busbar is applied to the perimeter of machined windows for conductivity / connectivity to a metal bezel or the metal case, faceplate, door, etc. Ceramic busbars are also available but are more highly specialized to applications and not a typical standard solution.
Typical Bus Bar Shapes
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.
Typical Busbar Widths (mm)
2.0mm | 3.0mm | 4.0mm | 5.0mm
6.4mm | 10.0mm | 12.7mm
15.0mm
*Others by request / per custom design.
