http://www.caplinq.com/led-assembly-materials.html CAPLINQ offers Silicones for LED Applications Part 1 of a 5-part Series. Part I : Advantages of Silicone over Organic Resins in the manufacture of LED Assemblies for High Power LED's and general lighting

1. CAPLINQ Europe BV
Manufacturer | Distributor | Partner
Whatyouneedto
knowaboutsilicones
forLEDassembly
SILICONE FOR LED APPLICATIONS

2. ALLPARTSINTHISSILICONESERIES
Part I: Advantages of Silicones over Organic Resins
Part III: LED Silicones for Molding (& Compression Molding)
Part IV: Premolded Silicones over PPA as Reflector
Part V: LED Silicones for Die Attach Assembly
1
2
3
4
5
Part II: Premolded Silicones for Fresnel Lenses

3. Some Text
Some Text
ANATOMY OFANLED PACKAGE
PremoldedSiliconeFresnelLens
Part II: Premolded Silicones for Fresnel Lenses
SiliconeEncapsulationMaterial
Part III: LED Silicones for Molding (&
Compression Molding)
PremoldedSiliconeReflector
Part IV: Premolded Silicones over PPA as
Reflector
SiliconeDieAttachMaterial
Part V: LED Silicones for Die Attach
Assembly

4. WAVELENGTHDEPENDENCY ONREFRACTIVEINDEX
“Phenyltype
silicones have a
higherrefractive
index than
Dimethyl type
silicones’’

5. TRANSPARENCY OFSILICONES
“Both Phenyl and
Dimethyltype
silicones have
transmittance rates
above 92% above
the visible range”

6. HIGH THERMAL STABILITY OFSILICONES
“Siliconesshowamuchhigher
thermalstabilitythanepoxies”

7. THERMALAGEINGOFDIMETHYLVSPHENYL-TYPE
 At higher temperatures (>170°C), Dimethyl-type silicones
show significant transmittance loss.
 At higher temperatures (>170°C), Phenyl-type silicones show
little transmittance loss.
“BothPhenylandDimethyltypesilicones
havetransmittanceratesabove92%
abovethevisiblerange”

8. NOCOLORCHANGE OFSILICONES
Silicone (Siloxane Structure) Organic Resin (PPA, Epoxy, etc)
Decompositiongenerates
SiO2 (glass)
+CH4 (gas)
+ … = NO Color Change
Decompositiongenerates
CO2, CO (gas)
+C (Carbon Black)
+NH (Brownish)
+ … = Color Change

9. STANDARDSILICONE(SUITABLEFORCOMPRESSIONMOLDING)
CAPLINQ LinqSil DM-1001 DM-1002 PH-5001 PH-5002
Type Dimethyl Type Phenyl Type
Mixing Ratio 1:1 10:1
Base Silicone Viscosity Pa.s 23.7 41 1.9 4.3
Hardner Silicone Viscosity Pa.s 4.5 18 5.3 2.2
Mix Viscosity Pa.s 9.4 37.6 2.5 3.5
Volatility % 0.6 0.2 0.3 0.8
Hardness Type A 79
89
(Shore D 30)
84 Shore D 40
Tensile Strength MPa 10.8 3 3 -
Elongation % 100 10 40 -
Young’s Modulus (E) MPa 26 67 6.2 25
CTE ppm/°C 258 222 212 222
Refractive Index nd25 1.4 1.5

10. GET IN TOUCH
Contact us to find out how CAPLINQ can help your company reach the next level
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CAPLINQ Corporation
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Orléans (Ottawa) ON K1C 2Y3
Canada
Phone: +1 (613) 482-2215
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1561 KK Krommenie
The Netherlands
Phone: +31 (20) 893 2224
Fax: +31 (84) 746 3497
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