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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/28660

Title: The fabrication and characterization of (Pb,Ca)TiO3 pyroelectric thin films with different Ca contents
Authors: C. C. Chang;Y. C. Lai
Contributors: NTOU:Department of Electrical Engineering
Keywords: lead compounds;calcium compounds;dielectric thin films;sputtered coatings;sputter deposition;machining;pyroelectricity;permittivity;dielectric polarisation;coercive force;infrared detectors;infrared imaging;image sensors
Date: 2007
Issue Date: 2011-10-21T02:38:56Z
Publisher: Journal of Applied Physics
Abstract: Abstract:This study uses radio-frequency sputtering methods to deposit lead titanate thin films with different contents of Ca on Pt/Ti/SiO2/Si substrates to form Pb1−xCaxTiO3 (PCT) thin films. The PCT thin films contained different amounts of Ca in order to examine the influence of the Ca content on the properties of thin films. Analysis of the electrical properties of the PCT thin films revealed that their relative permittivities, dissipation factors, and pyroelectric coefficients tend to increase with the Ca content. On the other hand, the coercive field and remnant polarization decreased with an increase in the Ca content. In addition, the measured data indicated that the figure of merit for voltage (Fv) and the figure of merit for detectivity (FD) of a PCT (30) thin film are the highest with values of 0.033 m2 C−1 and 0.862×10−6 (m3 J−1)1/2, respectively. Therefore, the PCT (30) thin film was evaluated as the best composition for manufacturing pyroelectric infrared (PIR) sensors. PCT thin films were also used to fabricate thermal PIR sensors by surface machining technology. The detectivity measurement showed that the PIR sensor with PCT (30) thin films has the highest value of D* (1.29×107 cm Hz1/2/W) at 0.3 Hz.
Relation: 101(10), pp.104-106
URI: http://ntour.ntou.edu.tw/handle/987654321/28660
Appears in Collections:[電機工程學系] 期刊論文

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