Conductive Coating
Conductive Coating is an excellent way to provide EMI Shielding to plastic enclosures. As a secondary process it provides a means to add coating later in production, allows rapid prototypes to be shielded and can provide varying performance dependent on requirement.
Conductive coatings exhibits excellent adhesion and can be applied to most plastics (including ABS, PC, PBT, PLA) and with the use of specialised adhesion promoters even low surface-energy materials like Polypropylene, and Nylon can be coated.
-
Excellent Coverage
Wet-spray coating allows complex internal geometries to be coated with minimal tooling costs.
-
Light Weight
With possible coating thickness below 12.5μm strict weight restrictions can be achieved with plastic enclosures.
-
Highly Conductive
Surface resistivity can be < 0.015 Ohm/square with excellent attenuation offering outstanding shielding performance.
Find out more about Conductive Coating
Benefits
Why Conductive Coating?
-
No Expensive Metalwork
Provides excellent shielding performance on plastic moulded, SLA or FDM enclosures. Eliminating the need for costly machining.
-
Saves Weight
A very low film thickness when applied to plastics allow for significant weight savings.
-
Excellent EMI Protection
Silver Coating provides shielding satisfying the most rigorous EMC testing requirements.
-
In-House Mask Tooling
Our capability to produce in house mask tools provide very short lead times on complicated enclosures.
Features
- Excellent Surface conductivity
- Dry thickness can be < 12.5μm
- Excellent adhesion to most substrates
- Compatible with sensitive plastics
- Adhesion Promoter can be used on difficult substrates
- Good scratch and heat resistance
- Range of products to suit requirements
In-House Tool Manufacture
At Uvox we produce in-house tooling for nearly all conductive coating applications. Enabling rapid prototyping and revisions throughout the design process with minimal tooling and re-tooling costs. We use traditional techniques combined with cutting-edge additive-manufacture to provide a solution tailored to each job.
Our Process
-
Recommend preferred conductive coating to be applied -
Determine required film thickness to achieve desired conductivity
-
Verify adhesion strength to substrate (recommend adhesion promoter or primer when needed)
-
Design and develop in-house masking solutions
-
Consider both shielding and cosmetic requirements
-
Ensure coating cure temperature is suitable for substrate
-
Define visual and conductivity inspection criteria and process controls
Coating Options
-
Coated Copper
Ag/Cu
Silver-coated copper conductive coating
Dry-film Thickness
< 25 μm
Surface Resistivity
< 0.015 Ω/square
-
Hybrid
Ag-Cu
A hybrid coating comprising silver and silver-coated Copper particles
Dry-film Thickness
< 12.5 μm
Surface Resistivity
< 0.015 Ω/square
-
Pure Silver
Ag
Unmatched conductivity – superior to any other coating
Dry-film Thickness
< 12.5 μm
Surface Resistivity
< 0.015 Ω/square
-
Non-Oxidizing
Cu
A special formulation comprising non-oxiding copper particles
Dry-film Thickness
< 25 μm
Surface Resistivity
< 0.05 Ω/square