ES3402 Epoxy Underfill Adhesive

ES3402 is a one-component epoxy for electronic devices and it is also suited for the application of electronic devices dam, insulation, moisture resistance, encapsulation, and bonding. The resin offers good machinability and stability. This product exhibits high adhesion strength, greasy resistance, and chemical and solvent resistance. The durability of this product is high levels and this resin can pass many environmental test experiments. For its characteristic and reliability, this resin is used widely in various areas, as a high-performance adhesive.

Features and benefits

  • Medium viscosity and good leveling; providing matted surface
  • Highly vibration resistance at ordinary temperature
  • Excellent retained strength after environmental test
  • Comply to the 2011/65/EU RoHS regulations
  • Comply to Chlorine < 900ppm, Bromine < 900ppm, Chlorine + Bromine < 1500 ppm



Properties ES3402
Appearance Viscous liquid
Color Black
Viscosity *25°C,

S14 20 rpm, cps

Viscosity *25°C,

S14 2rpm, cps

Thixotropic index 1.04


Properties ES3402
Pot Life, 25°C, days 2
Through Cured Time 120°C, min 60


Properties ES3402
Glass Transition Temp., (MDSC), °C 64
CTE (*2) (>Tg), μm/m/°C 226
Durometer Hardness, Shore D 69
Specific Gravity (20/200C) 1.28
Water Absorption Ratio (25°C/24hr), % 0.97
Water Absorption Ratio (80°C/24hr), % 3.15
Water Absorption Ratio (97°C/1.5hr), % 1.41
Specific Heat 0°C, J/g°C 6.26
Specific Heat 25°C, J/g°C 6.66
Specific Heat 50°C, J/g°C 6.96
Specific Heat 75°C, J/g°C 7.26
Specific Heat 100°C, J/g°C 7.47
Degradation Temp (TGA 10°C/min), °C 305
Weight Loss Ratio @100°C, % 0
Weight Loss Ratio @150°C, % 0
Weight Loss Ratio @200°C, % 0
Weight Loss Ratio @250°C, % 0.5
Weight Loss Ratio @300°C, % 4.5
Weight Loss Ratio @350°C, % 11.6
Volume Resistivity, Ohm-cm 5 x 10^15
Surface Resistivity, Ohm 5 x 10^14
Dielectric Constant 100Hz 4.37

Technical Documents

ES3402 Technical Data Sheet

How can we support you?

If you need any assistance, do not hesitate to contact us