Experimental Validation of Fatigue Life of CCGA 624 Package with Initial Contact Pressure of Thermal Gap Pads under Random Vibration Excitation

Table 1

Properties of THERM-A-GAP G579 thermal gap pad [17].

Typical properties		Value	Test method
Standard thicknesses (mm)		0.5 ~ 5.0	ASTM D374
Specific gravity		2.9	ASTM D792
Hardness (Shore 00)		30	ASTM D2240
Compression ratio (%, at various pressures)	At 34 kPa	22	ASTM C165 MOD
	At 69 kPa	33
	At 172 kPa	55
	At 345 kPa	68
Continuous use temperature (°C)		−55 to 200	—
Thermal impedance (°C·cm^2/W, at 69 kPa, at 1 mm thickness)		4.5	ASTM D5470
Coefficient of thermal expansion (ppm/°C)		150	ASTM E831
Outgassing (%, TML/CVCM)		0.19/0.06	—
Shelf life (years from date of manufacture)		2	—