Tech Briefs Magazine - October 2021 - ST-23

Tiny, Wireless, Injectable Chips Use Ultrasound to Monitor
Body Processes
Implantable chips visible only in a microscope point the way to developing chips that
can be injected into the body with a hypodermic needle to monitor medical conditions.
Columbia University, New York, NY
olumbia Engineers have developed
the smallest single-chip system that is
a complete functioning electronic circuit;
implantable chips visible only in a
microscope point the way to developing
chips that can be injected into the body
with a hypodermic needle to monitor
medical conditions.
C
Widely used to monitor and map biological
signals, to support and enhance
physiological functions, and to treat diseases,
implantable medical devices are
transforming healthcare and improving
the quality of life for millions of people.
Researchers are increasingly interested
in designing wireless miniaturized
implantable medical devices for in vivo
and in situ physiological monitoring.
These devices could be used to monitor
physiological conditions, such as temperature,
blood pressure, glucose, and
respiration for both diagnostic and therapeutic
procedures.
To date, conventional implanted
electronics have been highly volumeinefficient
- they generally require
multiple chips, packaging, wires, and
external transducers, and batteries are
often needed for energy storage. A
constant trend in electronics has been
tighter integration of electronic components,
often moving more and more
functions onto the integrated circuit
itself.
Researchers at Columbia Engineering
report that they have built what they say
is the world's smallest single-chip system,
consuming a total volume of less than
0.1 mm3. The system is as small as a dust
mite and visible only under a microscope.
In order to achieve this, the team
used ultrasound to both power and communicate
with the device wirelessly.
" We wanted to see how far we could
push the limits on how small a functioning
chip we could make, " said the study's
leader Ken Shepard, Lau Family professor
of electrical engineering and profesSensor
Technology, October 2021
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Tech Briefs Magazine - October 2021

Table of Contents for the Digital Edition of Tech Briefs Magazine - October 2021

Tech Briefs Magazine - October 2021 - Intro
Tech Briefs Magazine - October 2021 - Sponsor
Tech Briefs Magazine - October 2021 - Cov1
Tech Briefs Magazine - October 2021 - Cov2
Tech Briefs Magazine - October 2021 - 1
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Tech Briefs Magazine - October 2021 - Cov3
Tech Briefs Magazine - October 2021 - Cov4
Tech Briefs Magazine - October 2021 - CN-Cov1
Tech Briefs Magazine - October 2021 - 2a
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Tech Briefs Magazine - October 2021 - MD-Cov1
Tech Briefs Magazine - October 2021 - MD-Cov2
Tech Briefs Magazine - October 2021 - MD-1
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Tech Briefs Magazine - October 2021 - MD-3
Tech Briefs Magazine - October 2021 - MD-4
Tech Briefs Magazine - October 2021 - MD-5
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Tech Briefs Magazine - October 2021 - MD-8A
Tech Briefs Magazine - October 2021 - MD-8B
Tech Briefs Magazine - October 2021 - MD-8C
Tech Briefs Magazine - October 2021 - MD-8D
Tech Briefs Magazine - October 2021 - MD-9
Tech Briefs Magazine - October 2021 - MD-10
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Tech Briefs Magazine - October 2021 - MD-Cov3
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Tech Briefs Magazine - October 2021 - ST-Cov1
Tech Briefs Magazine - October 2021 - ST-Cov2
Tech Briefs Magazine - October 2021 - ST-1
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Tech Briefs Magazine - October 2021 - ST-19
Tech Briefs Magazine - October 2021 - ST-20
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