28 Proven in the Harshest Environments
FIGURE 6: Sports watch. (TE Connectivity)
Packaging for Protection
Packaging and environmental isolation of the
MEMS sensing element and the CMOS ASIC
is essential for the pressure sensor's reliable
functionality. They protect the chip and, at the
same time, allow connectivity to the outside world.
All sensors must be physically in contact with the
medium or phenomenon they are measuring. Also,
they must be connected to the electronic system
that is using the data provided by the sensor
(Figure 5).
Unique Technology for Harsh
Environments
TE Connectivity has developed miniaturized
pressure sensors suitable for exposure to harsh
and corrosive environments, including strong
oxidizers such as halogens— fluorine (F), chlorine
(Cl), bromine (Br), iodine (I). These types of harsh
environments exist in automotive, medical, and
personal wearables markets.
Chlorinated water in swimming pools presents
a similar and related problem for wearables
applications. TE Connectivity's pressure sensors
are used as altimeters for sports watches used
by triathletes or depth sensors in dive computers.
Without appropriate device packaging and
protection, the sensors can corrode and fail when
used in swimming pools or seawater, both rich in
dissolved or ionic chlorine (Figure 6).
FIGURE 5: Packaging and environmental isolation of the MEMS
sensing element and the CMOS ASIC is essential for the pressure
sensor's reliable functionality. (TE Connectivity)
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TE Connectivity /
Polamco Swept Elbow
Backshells
TE Connectivity 369
Shielded Rectangular
Connectors
