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Chemically Resistant adhesives

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Epoxy Technology EPO-TEK® H31LV Electrically Conductive, Silver Epoxy
Categories: Polymer; Adhesive; Thermoset; Epoxy; Epoxy, Electrically Conductive

Material Notes: Product Description: EPO-TEK® H31LV is a single component, silver-filled, electrically conductive epoxy designed for semiconductor die attach applications found in hybrids, JEDEC, and opto-electronic packaging. Low viscosity version of EPO-TEK® H31.

Advantages & Application Notes:

  • Bright /shiny silver provides high reflectance, especially good for enhancing LED overall brightness.
  • Rheology described as pourable paste:
    • Allows for high volume dispensing, wafer-level stamping, and pin transfer methods of application.
    • It is capable of spray coating or paint brush coating.
  • Suggested applications:
    • Semiconductor: die attach chips onto lead-frames for JEDEC Level III and II packaging. Adhesion to Ag-spot leadframe.
    • Hybrids: GaAs and Si die attach, adhesion to Au-plated chips, general electrical contacts for ceramic circuits, substrate attach to ground package.
    • Opto-electronic: single LED packaging in TO-cans, LED arrays on PCB or substrate, adhesion to ITO in LCDs, and sensor device/OEM instrumentation.
    • PCB/General: EMI or Rf shielding of electronics
  • Available in several different viscosity versions.

Information Provided by Epoxy Technology

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.57 g/cc
Particle Size <= 45 µm
Viscosity 2000 - 3500 cP
@Temperature 23.0 °C
100 rpm
 
Chemical PropertiesOriginal ValueComments
Ionic Impurities - Na (Sodium) 380 ppm
Ionic Impurities - K (Potassium) 47 ppm
Ionic Impurities - Cl (Chloride) 14 ppm
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 85
Tensile Modulus 257000 psiStorage
Shear Strength 1400 psiLap
 >= 1700 psiDie
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity <= 0.0080 ohm-cm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 26.0 µm/m-°CBelow Tg
 148 µm/m-°CAbove Tg
Thermal Conductivity 0.550 W/m-K
Maximum Service Temperature, Air 200 °CContinuous
 300 °CIntermittent
Minimum Service Temperature, Air -55.0 °CContinuous
 -55.0 °CIntermittent
Glass Transition Temp, Tg >= 110 °CDynamic Cure 20—200°C /ISO 25 Min; Ramp -10—250°C @ 20°C/Min
Decomposition Temperature 387 °CDegradation Temperature
 
Processing PropertiesOriginal ValueComments
Cure Time 1.00 hour
@Temperature 150 °C
Minimum Bond Line
Pot Life 4320 min
Shelf Life 6.00 Monthrefrigerated
 
Descriptive Properties
ColorSilver
ConsistencySmooth, pourable paste
Ionic Impurities NH48 ppm
Number of ComponentsSingle
Thixotropic Index1.8
Weight Loss0.13%200°C
 0.27%250°C
 1.05%300°C

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PPOXYT044 / 141083

Chemically Resistant adhesives

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