EPO-TEK® 301 Spectrally Transparent Epoxy, Room Temperature Cure (8oz)

The EPO-TEK® 301 Low Viscosity Epoxy is a two-component, room temperature curing epoxy featuring very low viscosity and excellent optical-mechanical properties. Suitable for semiconductor, fiber optic, PCB and opto-electronic applications. Available in 8oz kit. 

Features of 301:

• NASA-approved, low outgassing epoxy
• Recommended Cure: 65°C / 1 Hour 
• Pot life: 1-2 Hours

Applications:

• Fiber Optic:
  • Adhesive for glass and plastic fibers
  • Wicking into fiber bundles used in patch cords, endoscopes or sensor devices
  • Adhesive/seal/encapsulant used for fiber packaging and components
  • Transmission of IR up to 2500 nm 
  • Terminating fibers into ferrules
  • fiber coupling and splicing
• Semiconductor:
  • Optical glob top or underfill
  • Adhesion to common wafer passivation
  • Solder mask and flex circuits
  • Compatible with LED die, Si, GaAs.
• PCB: General potting and protection over FR4, flex, or ceramic PCBs.
• Opto-electronic:
  • LCD/LED adhesive for laminating glass layers
  • Adhesion to PET plastic
  • General potting, encapsulation, and protection
  • Spectral transmission in VIS and IR light
  • Adhesive/encapsulant for VCSEL's packaged devices
  • Resisting yellowing per ASTM D1925
  • Adhesive for precision optics, including lens, prism, beam splitter cubes, mirrors, and diodes, found in medical, university, or research communities

Physical Properties:

• Color: Clear/Colorless
• Consistency: Pourable liquid
• Viscosity (23°C) @ 100 rpm : 100-200 cPs
• Glass Transition Temperature, Tg: ≥ 65°C
• Shore D Hardness: 85
• Coefficient of Thermal Expansion (CTE):
  • Below Tg: 39 x 10^-6 in/in°C
  • Above Tg: 98 x 10^-6 in/in°C
• Suggested Operating Temperature: < 300 °C (Intermittent); < 572°F  

Optical Properties:

• Spectral Transmission:
  • ≥ 99% @ 382-980 nm
  • ≥ 97% @ 980-1,640 nm
  • ≥ 95% @ 1,640-2,040 nm
• Refractive Index: 1.519 @589 nm

See Datasheet for additional properties and application notes