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Ensinger PEI
Epoxy Technology EPO-TEK® 305 Spectrally Transparent Epoxy
Categories: Polymer; Thermoset; Epoxy

Material Notes: Product Description: EPO-TEK® 305 is a two component, semi-rigid, optical grade epoxy for semiconductor packaging of fiber optics, optoelectronics and medical devices. It is an electrically and thermally insulating epoxy.

Advantages & Application Notes:

  • Capable of transmitting light in the UV range. %Transmission from 248 to 400 nm may be realized.
  • Tg and Shore D values are indicative of a somewhat “semi flexible or semi rigid” epoxy. It can be used for low stress applications in optics.
  • Low viscosity, water-like epoxy formulation. This allows for application by pouring, dip coating, brushing, or microdispensing methods.
  • Versatility in curing from 23°C to 80°C range. This allows many types of low cost plastic substrate or housings to be used.
  • Suggested applications:
    • Optics:
      • Index matching epoxy for adhesive and coating applications with Scientific / OEM instruments and sensor devices
      • LED potting and encapsulation; LCD glass-glass or glass-PET laminations
    • Fiber Optics: potting or sealing the fiber into the snout of the opto-package in order to provide stress relief.
    • PCB / General: low stress potting of electronics as a clear encapsulant, COB glob top encapsulant.

    Information Provided by Epoxy Technology

Available Properties
  • Specific Gravity, Part B
  • Specific Gravity, Part A
  • Viscosity, 100 rpm
  • Hardness, Shore D
  • Tensile Modulus, Storage
  • Shear Strength, Lap
  • Shear Strength, Die
  • Volume Resistivity
  • Dielectric Constant
  • Dissipation Factor
  • CTE, linear, Below Tg
  • CTE, linear, Above Tg
  • Maximum Service Temperature, Air, Continuous
  • Maximum Service Temperature, Air, Intermittent
  • Minimum Service Temperature, Air, Continuous
  • Minimum Service Temperature, Air, Intermittent
  • Glass Transition Temp, Tg, Dynamic Cure 20—200°C /ISO 25 Min; Ramp 10—200°C @ 20°C/Min
  • Decomposition Temperature, Degradation Temperature
  • Refractive Index, uncured
  • Transmission, Visible, Spectral
  • Transmission, Visible, Spectral
  • Transmission, Visible, Spectral
  • Cure Time
  • Cure Time
  • Pot Life
  • Shelf Life
Property Data

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