Silicone Paste | Opto-Electronic | Product | 立承德科技

Silicone Paste
Dow Corning silicone solutions for LED packages are designed to meet the challenging needs of the LED market. Silicone products offer good compatibility with standard LED substrates and processing techniques. The Dow Corning product line contains gels, elastomers and resins.
Features • High optical transparency • Excellent UV resistance • Excellent thermal stability • Low moisture up-take • Low ionic content	Benefits • Well-suited for IR, visible or UV optical applications • Lead-free solder reflow temperatures • Flexibility in manufacturing • Good adhesion to various lead frames
1.Encapsulants: Gel, Elastomer and Resin Dow Corning provides both High RI and Normal RI OE Series silicone encapsulants, which have outstanding light transmittance across the application wavelengths of LEDs. These encapsulants provide excellent stress relief, moisture protection and UV resistance for LED chip sealing and protection. 2.Lens Molding: Elastomer and Resin Dow Corning provides the high RI resin material needed for optical lens fabrication. These products are designed with excellent injection and compression molding characteristics. 3.Overmolding: Elastomer and Resin Dow Corning® OE Series silicone encapsulants are excellent candidates for the overmolding process, the leading- edge process technology.

Material Properties of HRI Encapsulants
NRI Encapsulants	Dow Corning® OE-6450	Dow Corning® OE-6520	Dow Corning® OE-6550	Dow Corning® OE-6630	Dow Corning® OE-6635	Dow Corning® OE-6665
As Supplied
Component	2-part	2-part	2-part	2-part	2-part	2-part
Mixing Ratio	10:1	10:1	1:1	1:1	1:1	1:1
Cure Condition, °C/hr	150/1	125/0.5	80/1	150/1	150/1	150/1
Viscosity, Pa·s	2.1	5.4	0.5	0.35	3.4	1.5
After Cure
Hardness, JIS A	-	-	-	35	71	65
Refractive Index	1.42	1.41	1.41	1.40	1.41	1.41
Transmittance, % @ 450 nm, 1 mm	99	91.5	100	99	97	98

Material Properties of NRI Encapsulants
NRI Encapsulants	Dow Corning® JCR 6110 A/B	HIPEC® Q1-4939	Dow Corning® OE-6250	Dow Corning® JCR 6122	Dow Corning® EG-6301	Dow Corning® OE-6336
As Supplied
Component	2-part	2-part	2-part	2-part	2-part	2-part
Mixing Ratio	10:1	10:1	1:1	1:1	1:1	1:1
Cure Condition, °C/hr	150/1	125/0.5	80/1	150/1	150/1	150/1
Viscosity, Pa·s	2.1	5.4	0.5	0.35	3.4	1.5
After Cure
Hardness, JIS A	-	-	-	35	71	65
Refractive Index	1.42	1.41	1.41	1.40	1.41	1.41
Transmittance, % @ 450 nm, 1 mm	99	91.5	100	99	97	98

Material Properties of HRI Silicone Lens Resin
HRI Lens Molding	Dow Corning® SR-7010	Dow Corning® OE-4705*
Application	Cavity Molding	Injection Molding
As Supplied
Components	2-part	2-part
Mixing Ratio	1:1	1:2
Viscosity, Pa·s	14	44
Curing Condition	< 1 min@170°C	150 ~ 170°C/2 min (thickness dependent)
After Cure
Hardness, Shore D	67	60
Refractive Index	1.53	1.53
Light Transmittance, % @ 450 nm	99	> 99