Galden® PFPE Testing
Electronic Fluids
Galden® PFPE electronic fluids is a line of dielectric fluids with boiling points ranging from 55°C to 270°C. Theirexcellent dielectric properties, high chemical and thermal stability combined with their capacity to operate at very low as well as elevated temperatures make them ideal for electronic quality testing.
Features | Benefits |
High boiling point with low pour point and low viscosity Low evaporation rate Good heat transfer performance | Wide choice of grades to optimize performance Low consumption Low environmental load Better temperature control |
High dielectric strength Excellent electrical resistivity (a billion times higher than DI-Water) No change in dielectric properties with use | No damage to sensitive electronics when immersed in the liquid No risk of short circuiting Better process control |
Excellent thermal and chemical stability Good compatibility with materials | No corrosion or reaction with materials of construction No formation of decomposition residues |
No flash or fire points No auto ignition point No explosion hazards | Enhanced safety Safe to use at high temperature |
Fluids non-reactivity, excellent dielectric properties, nontoxicity, non flammability and non-solvent features make Galden® PFPE electronic fluids suitable for electronic reliability testing including thermal shock and hermetic seal testing.
Galden® PFPE Thermal Shock Testing
Thermal Shock: The Test
Thermal shock testing is performed to check the resistance of electronic devices to extreme changes of temperature. The test is carried out by alternately dipping the devices in liquids maintained at two different temperatures. For military applications thermal shock test has to be performed as specified in MIL STD 883 method 1011 orMIL STD 202 method 107.
Dual Fluid or Single Fluid?
Dual Fluid System
Traditionally two different fluids can be used in the hot and cold bath, but this practice presents the following disadvantages: high fluid loss from cold bath, cross contamination between cold and hot baths, equipment downtime and dual fluid inventory.
Single Fluid System
Galden® PFPE fluids with their single fluid system is an advantageous alternative to the dual fluid solution. Galden® D02TS and D03 are the single fluids which can successfully replace the need for a dual fluid system. Galden® D02TS is the proposal for all the military applications; it meets the MIL STD 883 and MIL STD 202while for all non-military applications Galden® D03 can be used.
A single fluid for both baths allows for a dramatic decreasein operating costs by:
• Decreasing fluid consumption
• Reducing equipment downtime
• Eliminating cross contamination
• Reducing inventory to a single product
Galden® PFPE fluids for thermal shock testing
conforming to MIL STD 883
Test Condition
| B | C | D | E | F |
Hot Step[°C] | 125 | 150 | 200 | 150 | 200– |
Cold Step[°C] | –55 | –65 | –65 | –195 | 195 |
Hot BathFluid | D02 D02TS | D02 D02TS | D05 | D02 D02TS | D05 |
Cold BathFluid | DET D02TS | DET D02TS | DET | Liquid 
| Liquid
|
Galden® PFPE Hermetic Seal Testing
Hermetic Seal: The Test
Electronic devices must be completely sealed to avoid penetration by moisture and potential damage of the electrical response of the silicon chip.
To guarantee the hermeticity of devices, a leak test procedure has been defined and ruled by MIL STD 883, MIL STD 750 and MIL STD 202.
Galden® PFPE fluids being extremely inert and residue free are ideal and widely used as detector and indicator fluids in leak test procedures.
Galden® DET
Detector fluid specifically designed for high reliability measures. Galden® DET, Type I and III detector fluid, offers higher reliability with respect to traditionally used fluids. Galden® DET, thanks to its perfect balance between low and high boilers components, can easily detect large and small leaks:
• High boilers enter through large leaks and remain liquid until the test is performed
• Low boilers can easily penetrate into small leaks
Galden® D02 and D03
Low consumption indicator fluids.
Galden® D02 and D03 can be advantegeously used as Indicator fluids respectively in military and non-military applications.
• Higher boiling point
• Lower vapor pressure at test temperature
Will Result in...
• Reduced evaporative loss
• Lower consumption compared to other commercially available indicator fluids
Galden® PFPE fluids for gross leak test
conforming to MIL STD
Fluid Type | Type I Detector | Type II Indicator | Type III Detector |
Test Condition | C1, C3 | C1 | E |
Galden® Fluids | DET | D02 | DET |
Thermal shock testing
|
| Single Fluids | Dual Fluids |
Typical Properties | Units | D02TS | D03 | D02 | D05 |
Boiling point | °C | 165 | 203 | 175 | 230 |
Pour point | °C | –97 | –85 | –97 | –77 |
Density at 25°C | g/ | 1.77 | 1.79 | 1.77 | 1.82 |
Density at –54°C | g/ | 1.95 | 1.96 | 1.95 | 1.98 |
Kinematic viscosity at 25°C | cSt | 1.7 | 2.4 | 2.4 | 4.4 |
Kinematic viscosity at –54°C | cSt | 45 | 160 | – | – |
Specific heat at 25°C | J/Kg·°C | 973 | 973 | 973 | 973 |
Thermal conductivity at 25°C | W/m·°C | 0.07 | 0.07 | 0.07 | 0.07 |
Coefficient of expansion | /·°C | 0.0011 | 0.0011 | 0.0011 | 0.0011 |
Surface tension | dyne/cm | 16 | 16 | 16 | 17 |
Dielectric strength | kV (2.54 mm gap) | 40 | 40 | 40 | 40 |
Dielectric constant |
| 2.1 | 2.1 | 2.1 | 2.1 |
Volume resistivity | Ohm·cm | 5· | 5· | 5· | 5· |
Average molecular weight | amu | 750 | 870 | 760 | 1,020 |
Typical properties (Not for specification purpose)
Hermetic seal testing
|
| Detector Fluids | Indicator Fluids |
Typical Properties | Units | DET | D02 | D03 |
Boiling point | °C | 81 | 175 | 203 |
Pour point | °C | –110 | –97 | –85 |
Density at 25°C | g/ | 1.70 | 1.77 | 1.79 |
Density at 125°C | g/ | - | 1.54 | 1.58 |
Kinematic viscosity at 25°C | cSt | 0.60 | 1.80 | 2.40 |
Kinematic viscosity at 125°C | cSt | - | 0.46 | 0.55 |
Specific heat at 25°C | J/Kg·°C | 973 | 973 | 973 |
Thermal conductivity at 25°C | W/m·°C | 0.07 | 0.07 | 0.07 |
Coefficient of expansion | /·°C | 0.0011 | 0.0011 | 0.0011 |
Surface tension | dyne/cm | 16 | 16 | 16 |
Dielectric strength | kV (2.54 mm gap) | 40 | 40 | 40 |
Dielectric constant |
| 2.1 | 2.1 | 2.1 |
Volume resistivity | Ohm·cm | 5· | 5· | 5· |
Average molecular weight | amu | 430 | 760 | 870 |
Typical properties (Not for specification purpose)