Effect of operating temperature on electrical and thermal properties of microbolometer infrared sensors
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Authors
Karunasiri, Gamani
Ramakrishna, M.V.S.
Neuzil, P.
Subjects
microbolometer
thermal conductance
heat capacitance
temperature dependence
thermal conductance
heat capacitance
temperature dependence
Advisors
Date of Issue
2003-03-10
Date
March 10, 2003
Publisher
National University of Singapore (NUS Libraries)
Language
Abstract
The electrical and thermal parameters of microbolometer infrared sensors play an
important role in determining the ultimate sensitivity of detection. This paper describes in
detail the effect of varying the operating temperature (80-300 K) on the thermal and
electrical properties of microbolometer infrared detectors using Ti resistive sensor elements.
In the experiment, two microbolometers with different thermal conductances were
employed. The parameters studied include the temperature coefficient of resistance
(TCR), thermal conductance and thermal mass (heat capacitance). The measurements
show that the heat capacitance increases linearly with operating temperature while the
thermal conductance increases linearly at low temperatures ( < 250 K) and then rapidly
increases. The rapid increase in thermal conductance at elevated temperatures is mainly
due to the radiated heat loss which may limit the performance of micro bolometer sensors at
high ambient temperatures.
Type
Article
Description
Series/Report No
Department
Physics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
U. S. Naval Postgraduate School
Funding
Format
8 p.
Citation
Karunasiri, Gamani, M. V. S. Ramakrishna, and P. Neuzil. "Effect of operating temperature on electrical and thermal properties of microbolometer infrared sensors." (2003).
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.