EPO-TEK® 323LP High Temperature Epoxy, Heat Cure (15g)

EPO-TEK® 323LP Optical Epoxy is a two component, high temperature epoxy designed for semiconductor, hybrid, fiber, optical and medical applications. It is a longer pot life alternative to EPO-TEK 353ND. Extended Pot Life 24 hours. Available in a 15g packet.

Recommended Cure: 150°C / 1 Hour

Features of 323LP:

• Pot Life: 24 hours
• It has an amber color change upon cure.
• High-temperature epoxy
• Telcordia GR-1221 Compliant
• Resisting >200°C field conditions
• Transmitting light in the optical pathway from 800 to 1,550 nm range

Applications:

• Fiber optic adhesive designed to meet Telcordia 1221:
  • Sealing fiber into ferrules, transmitting light in the optical pathway from 800-1,550 nm range.
  • Fiber component packaging; adhesive for active alignment of optics, environmental seal of opto-package, V-groove arrays.
• Semiconductor: Wafer-to-wafer bonding of CSP; fabrication of MEMs devices; flip chip underfill.
• Hybrid:
  • Providing near hermetic seals and UHV seals in sensor devices, resisting high-temperature packaging.
  • Down-Hole petrochemical fiber optic sensors, resisting >200°C (392 °F) field conditions.
• Electronic Assembly:
  • Used as a dielectric layer in the fabrication of capacitors, laminating PZT piezoelectrics.
  • Impregnating and insulating copper coil windings in motors and inductor coils. Bonding ferrite cores and magnets.

Physical Properties:

• Color before cure:
  • Part A: Clear to slight yellow
  • Part B: Yellow
• Consistency: Pourable liquid
• Viscosity (23°C) @ 50 rpm: 3,500 - 5,000 cPs
• Glass Transition Temperature, Tg: ≥ 100°C 
• Coefficient of Thermal Expansion (CTE):
  • Below Tg: 51 x 10^-6 in/in°C
  • Above Tg: 185 x 10^-6 in/in°C
• Shore D Hardness: 88
• Lap Shear @ 23°C: > 2,000 psi
• Die Shear @ 23°C: ≥ 20 Kg (7,112 psi)
• Weight Loss: 
  • @ 200°C: 0.31%
  • @ 250°C: 0.46%
  • @ 300°C: 0.85%
• Suggested Operating Temperature: < 300 °C (Intermittent)
• Storage Modulus: 444,110 psi

Electrical and Thermal Properties:

• Volume Resistivity @ 23°C: ≥ 3 x 10¹² Ohm-cm   
• Dielectric Constant (1KHz): 2.62 
• Dissipation Factor (1KHz): 0.003

Optical Properties:

• Spectral Transmission:
  • ≥ 94% @ 820-1,620 nm
  • ≥ 90% @ 640-800 nm
• Refractive Index: 1.5704 @ 589 nm

See Datasheet for additional properties and application notes