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Optically Clear Molding Compounds

"Opto" molding compounds provide durable clarity, high product yields, superior process characteristics and high reliability for applications including image sensors, photo detectors, infrared devices, and LED displays. SolEpoxy optoelectronic encapsulants provide moisture resistance, thermal shock durability and excellent color stability even in outdoor applications and at elevated temperatures.

Strengths: Durable optical clarity, Heat stability, UV stability, & Moldability

Unique Characteristics

Transmission properties can be tailored to specific wavelengths and our proprietary resin system provides outstanding resistance to yellowing even after extended exposure to UV light. We call this "Durable Clarity."

It's because, unlike other clear molding compounds the MG18 and MG97 family of products do not contain aromatic compounds. When exposed to UV light, most aromatic compounds form unstable free radicals which degrade the polymer and cause yellowing.

Color stability is crucial to devices that emit UV light such as VCSELs and white LEDs, as well as in outdoor exposure applications. Long-term thermal exposure may also cause discoloration when aromatic compounds are present. Superior color stability through UV and thermal aging is the hallmark of SolEpoxy optoelectronic encapsulants.

Durable Clarity SolEpoxy Materials Remain Clear & Resist Yellowing
Transmission at 400nm
No aromatic compounds means:
  • Less UV yellowing
  • Less heat yellowing
  • More stable colors
Typical Applications
  • LED Encapsulation
  • 7 Segment Displays
  • IR Transceivers
  • White LED Encapsulation
  • Photo Modules
  • Photo Detectors
  • IRDA
  • Image Sensors
  • Optocouplers
Application Gallery
Cast Pellet Products
  • MG18 Family Standard High Clarity Optoelectronic Molding Compounds
    Transparent epoxy molding compound for light emmitting diodes, image sensors and opto sensors.
  • MG97-7000 Family Lower moisture absorption compared to MG18
    Transparent epoxy molding compound specifically designed for surface mount optoelectronic devices. Lower moisture version of MG18; great for automotive and exterior applications where temperature and humidity are widely variable.
  • MG97-8000 Family Lower moisture absorption and higher glass transition temperature compared to MG18
    Transparent epoxy molding compound specifically designed for surface mount optoelectronic devices, such as LEDs, image sensors and opto sensors. Lower moisture absorption and higher Tg version of MG18; great for high-intensity LEDs and sensors in hot applications.
Pressed Pellet Products
  • OP1000 Family Standard Optoelectronic Molding Compounds
    This material is ideal for LED, opto couplers, numeric displays and IR transceivers. OP1000 provides lower moisture absorption and improved color stability over previous generation optoelectronic molding compounds.
  • OP7000 Family Lower moisture absorption and higher glass transition temperature compared to MG18
    This material is ideal for high-intensity light emitting diodes, opto couplers, numeric displays and IR transceivers. OP7000 is a pressed pellet version of MG97-8000.
Physical Properties
unit MG18 MG97-7000 MG97-8000 OP1000 OP7000
Glass Transition Temp C 125 125 140 144 140
CTE Alpha 1, 80-100C ppm/C 70 72 72 74 72
Flexural Modulus GPa 3.57 3.42 3.7 3.42 3.7
Tensile Strength MPa 55.3 48.6 47.7 45.5 47.7
Moisture Absorption - 24hr boil wt% 4.9 3.3 2.6 2.81 2.6
Hardness Shore D 85 85 85 87 85
Mold Shrinkage % 1.6 1.5 1.7 1.5 1.7
Specific Gravity g/cc 1.33 1.30 1.30 1.29 1.30
Dielectric Constant 100 kHz 3.7 3.4 3.4 3.43 3.4
Dissipation Factor 100 kHz 0.017 0.016 0.015 0.016 0.015
Dielectric Strength kV/mm 44.9 51.2 48.4 47.1 48.4
Color Choices
  • Black
  • Blue
  • Clear
  • Clear diffused
  • Yellow diffused
  • Orange
  • Red
  • Red diffused
  • Green
  • Green diffused
  • Pink

Use Color-dyed Clear Epoxy to Achieve Tunable Transmittance
  • Colored LEDs
  • Selective sensors
  • Black dye filters for IR only
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