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Liquid Metal Interconnects for Conformable Sensor Packaging Enabling Inertial Measurements of Animals and Soft Robots
Fig: A soft PDMS encapsulated sensor system
with embedded inertial measurement system
IC, discrete components, and microfluidic
channels for liquid-metal interconnects. This
packaging method enables all-soft-material
packaging of sensors and electronics for soft
robotic systems, internet-of-things
applications, and biometric measurements on
small, soft animals.
In biomechanics, inertial measurements units (IMUs) are used to map
the dynamic modes and gates of locomotion of animals. Typically,
thin wires are soldered to the IMU and the package is bonded to the
location of interest, on the animal, using cyanoacrylate or epoxy.
These types of adhesives and the solder of the interconnects are
brittle and typically fail from cyclic loading of the animal flexing
its body. The same situation can be found in soft robotics, where a
compliant and durable way of connecting electrical components within
the body of the robot is required to maintain its "soft"
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