Opto-electronics
Conformal Coating

Transparent conformal coating of optical assemblies such as sensors or LEDs

ELPEGUARD conformal coating SL1305 AQ-ECO

• high transparency and yellowing resistance

• individual transparent colouring in red, green or blue

• water-thinnable and fast drying

ELPEGUARD conformal coating SL1307

• high transparency and extremely high yellowing resistance

• fastest drying and easy repair - also available in handy spray tins

ELPEGUARD conformal coating SL1307 FLZ-T in cartridges

• ultra-thixotropic adjustment for high definition dispenser application of dams around plugs, components and pads to limit the application area of a subsequent conformal coating ( dam and fill)

ELPEGUARD thick film lacquers TWIN-CURE DSL 1600 E-FLZ

• high transparency and yellowing resistance

• combined with diffusor ink EH 13.400 UV extends the scattering angle of LEDs

• solvent-free, UV curing, shadow curing without additional temper step

ELPEGUARD silicone thick film lacquers DSL 1705 FLZ

• can be used at high temperatures up to 180 °C and under strong moisture stress, high chemical resistance

• addition cross linking; thermal curing; for thick film applications up to 3 mm

ELPEGUARD silicone thick film lacquers DSL 1706 FLZ

• can be used at high temperatures up to 180 °C and under strong moisture stress, high chemical resistance

• condensation cross linking at room temperature; for thick film applications up to 300 µm.

Opaque conformal coatings for optoelectronics

ELPEGUARD® conformal coatings SL 1347 and SL 1397

Selective coating with the white opaque conformal coating ELPEGUARD SL 1397 ensures maximum luminous efficacy: The LEDs are left uncoated while dark components are hidden, thus amplifying the luminous efficacy (reflectivity) considerably. As key characteristics, ELPEGUARD SL 1397 boasts very high reflectivity ratings (> 0.9 at 460 nm) along with high UV and thermal stability.

Application of the black opaque, mat conformal coating ELPEGUARD SL 1347 ensures a strong contrast to the base material. With this material, it is possible to coat selected areas of assemblies (which are usually coated with green solder resist) in black to achieve a strong contrast of the LEDs to the non-reflective base material. This is of particular advantage in applications with emphasis on high optical quality, such as information panels, traffic lights, etc.
 
Substrate Coating

Substrate coating, e.g. under LEDs

White solder resists  ELPEMER®

• optimises the light emission of LEDs, very high reflectivity of the substrate through application of a „neutral“ white opaque solder mask (colour of white LEDs is not falsified)

• pure white colour even after lead-free reflow, soldering and tempering processes

• also for flexible application

 

Black solder resists ELPEMER®

• minimum light reflection from the substrate by using a black solder resist

• increased contrast to the LED

• also for flexible applications
 
Potting

Clear potting of optical assembly in optoelectronics for potting LED lights, illuminated keyboards and fittings

Peters casting compounds and resins fulfil almost every wish with its variety of hardnesses, viscosity adjustments and specialty products e.g. for underwater use.

Click here to have a casting compounds overview.

Wepuran casting resins of the series VT 3402 KK

• colourless and crystal clear, excellent transparency, for highest demands on optical properties, very good weather resistance, excellent UV light stability and good thermal resistance, selected adjustments suitable for underwater use

• light diffusing effect or colouration by the addition of hazing paste or dyestuff concentrate

Wepuran casting resin VT 3404 HE

• yellowish transparent and highly elastic with good weather resistance, ideal for applications with no special demands on the optical properties, e.g. to pot assemblies where an opaque material does not restrict the field of use; easy to remove for repair purposes

Wepuran casting resin VT 3405

• clear and highly transparent with good weather and UV light stability, thus ideal for applications with moderate demands on the optical properties, e.g. to pot assemblies that must remain permanently visible; easy to remove for repair purposes, economic alternative to VT 3402 KK

Wepesil casting resin VT 3601 E

• colourless and clear transparent, weather and UV resistant, very high elasticity and tear strength

• excellent thermal resistance up to 200 °C
 


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