EPO-TEK® H74F

About
A two component, high Tg, thermally conductive, electrically insulating epoxy designed for semiconductor packaging including heat sinking, hermetic sealing, and opto-electronic assemblies. It may be used for flip chip underfill, sealing sensor devices packaged in TO-cans or fiber optic feed-through. It may be considered a finer particle version of EPO-TEK® H74.&&

Product Description
Generic环氧树脂
Material StatusCommercial: Active
FeaturesThermal conductivity,Insulation
AvailabilitysAfrica & Middle East ,North America,Asia Pacific,Europe

Technical Data
PHYSICALNominal valueUnitTest method
Particle size< 20.0µm
Ionic type 
Cl-41ppm
K+9ppm
Na+20ppm
NH4+100ppm

Supplementary informationNominal valueUnitTest method
Degradation Temperature486
Die Shear Strength(>15 kg,23℃)35.2MPa
working temperature 
Continuous-55 to 250
Intermittent-55 to 350
Storage Modulus(23℃)4.40GPa
Thixotropic index1.90 
Heating reduction 
200℃0.050%
250℃0.050%
300℃0.10%

Uncured PropertiesNominal valueUnitTest method
colour 
Amber 
Grey 
Density 
Part B1.02g/cm³
Part A2.01g/cm³
viscosity
23℃45 to 75Pa·s
Curing time
150℃1.0hr
storage stability180min

Cured PropertiesNominal valueUnitTest method
Shore hardness
Shaw’s D88 
lap shear strength
23℃> 13.8MPa
Relative permittivity
1 kHz4.90 
Volume resistivity
23℃> 5.0E+13ohms·cm
Dissipation factor
1 kHz0.012 

THERMALNominal valueUnitTest method
3.3E-5cm/cm/℃
1.1E-4cm/cm/℃
Glass transition temperature> 90.0
Linear coefficient of thermal expansion
MD 
Thermal conductivity coefficient0.52W/m/K
Thermosetting components 
Component A按重量计算的混合比: 100 
Component B按重量计算的混合比: 4.0 
Storage period
23℃52wk

Notes
1. Typical properties: these are not to be construed as specifications.
2. Dynamic Cure 20-200°C/ISO 25 Min; Ramp -10-200°C @ 20°C/Min
3. Below Tg
4. Above Tg
5. Part B
6. Part A
7. 5 rpm
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