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Metal adhesives

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Lord Adhesives Circalok™ 6037 Epoxy Adhesive
Categories: Polymer; Adhesive; Thermoset; Epoxy; Epoxy, Thermally Conductive

Material Notes: Circalok™ 6037 is an epoxy adhesive formulated for use by the semiconductor industry. An easy-to-spread thixotropic paste, it offers high heat transfer, low shrinkage, and a coefficient of thermal expansion comparable to that of copper and aluminum. Its strong bond to a wide variety of substrates resists severe temperature cycling. This adhesive is principally used to form thermally conductive joints in fabricated heat sinks and between heat sinks and power devices. When used to bond semiconductors to heat sinks, it also serves as an electrical insulator; but the semiconductor’s mating surfaces should be precoated with E-343 and allowed to cure to insure the dielectric integrity of the epoxy interface.

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Physical PropertiesOriginal ValueComments
Specific Gravity 2.30 - 2.40 g/cc
@Temperature 25.0 °C
Water Absorption 0.15 %
@Temperature 25.0 °C
10 days
Linear Mold Shrinkage 0.0020 in/in
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 92 - 94
Tensile Strength, Yield 10500 psi
@Temperature 25.0 °C
Elongation at Yield 1.4 - 1.6 %
Compressive Strength 29400 psi
@Temperature 25.0 °C
Shear Strength 2930 psi
@Temperature 25.0 °C
After 30 days in H20
 3840 psi
@Temperature 25.0 °C
Bond; Aluminum to aluminum, 1" overlap
Izod Impact, Notched 0.300 ft-lb/in
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 1.00e+16 ohm-cm
@Temperature 25.0 °C
Dielectric Constant 6.1
@Frequency 1e+7 Hz,
Temperature 25.0 °C
Dielectric Strength 1000 - 2000 V/mil
@Thickness 0.0762 mm
Dissipation Factor 0.020
@Frequency 1e+7 Hz,
Temperature 25.0 °C
 
Thermal PropertiesOriginal ValueComments
CTE, linear 22.0 µm/m-°C
Thermal Conductivity 1.40 W/m-K
Maximum Service Temperature, Air 155 °CContinuous
 250 °CIntermittent
Heat Distortion Temperature 155 °C
Minimum Service Temperature, Air -100 °CIntermittent
 -65.0 °CContinuous
 
Processing PropertiesOriginal ValueComments
Shelf Life 12.0 Month
@Temperature 21.0 - 27.0 °C
 
Descriptive Properties
AppearanceBlack or Green
ConsistencyPaste
Thermal Resistance (ºC-in/W)28

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PLORD033 / 86041

Metal adhesives

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