Freescale Semiconductor, Inc.
consistent stoichiometry, and temperature control all within a
MEDIA TEST METHODS
safe environment. The safety aspects of the testing were
obtained by creating an environment free of oxygen to eliminate
the possibility of a fire. Results from the testing have included
swelling of silicone materials, corrosion, and adhesive failures.
Figures 11 and 12 show a test apparatus specifically intended
for use with solvents and Figure 13 an apparatus for aqueous
solutions. This test system has resulted in a realistic test
environment that provides electrical bias, in situ measurements,
TO AUTOMATIC TEST SYSTEM
WITH VOLTAGE AND CURRENT
LINKING PROTECTION
THERMOCOUPLES
FLUORINATED
HYDROCARBON
LIQUID WITH
EXTERNAL
POROUS NITROGEN
PURGE LINES
ELECTRICAL
CONNECTIONS
HEATER
CONDENSER COILS
LID
MODULAR TEST
PLATE WITH
O–RING SEAL
SENSORS
L
I
V
A
P
O
R
Q
U
I
D
TANK
1
TANK
2
LOADING CHAMBER
FROM PUMP
TO PUMP TO DRAIN
Figure 11. Graphical depiction of the sensor media tester used for liquid or vapor exposure of the device to the
harsh media to accelerate the failure mechanisms or demonstrate compatibility.
Figure 12. Photograph of the load chamber area of the Media Test System allowing for fuel or solvent testing at
temperature with in situ monitoring of the devices under test (DUT’s) output.
Motorola Sensor Device Data
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