Browsing by Author "Jan, CK"

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Characteristics of (Pb, Sr)TiO3 films post treated by low temperature technologies
(2004)
Wang, JL
;
Jan, CK
;
Shye, DC
;
Kuo, MW
;
Cheng, HC
The novel annealing technologies, rapid thermal annealing (RTA) and excimer laser annealing (ELA) at low substrate temperature (300degreesC), were applied on the (Pb, Sr)TiO3 (PSrT) films. The PSrT film post treated by ELA only exhibits ferroelectric property and lager dielectric constant than as-deposited PSrT film. The PSrT film post treated by RTA only shows poor P-E curve and large leakage current. Interesting, the electrical properties of the PSrT film can be greatly enhanced by both of the ELA and the succeeding RTA treatments, so ferroelectric properties and dielectric constant can be reached as high as 15 muC/cm(2) of P-s and 574 of dielectric constant. In this work, excellent electrical properties of PSrT film post treated by both of ELA and succeeding RTA at low substrate temperature were systematically studied.
Current-temperature characteristics of low-temperature-sputtered (Ba,Sr)TiO3 films post treated by rapid thermal annealing
(2002)
Shye, DC
;
Chen, JS
;
Kuo, MW
;
Chou, BCS
;
Jan, CK
This work reports the current-temperature characteristics of the low-temperature-sputtered (Ba0.8Sr0.2)TiO3 (BST) film post treated by rapid thermal annealing (RTA) in O-2 ambient. The top electrode was biased under negative/positive voltage to investigate the interface properties of the Pt/BST/Pt multifilm. As the results, the current density of the RTA-treated BST film was greatly reduced owing to compensation of oxygen vacancies. The RTA-treated BST thin film biased at negative voltage exhibits a negative temperature-coefficient-resistivity (NTCR) behavior, but, intriguingly, that biased at positive voltage reveals a positive temperature-coefficient-resistivity (PTCR) behavior. According to the leakage current analysis, the Schottky emission dominates the negative biased current at upper interface, but the Heywang barrier scattering confines the positive biased current.
Dependence of polarization on temperature coefficient resistance of (Ba, Sr)TiO3 thin films post-treated by RTA
(2003-04-01)
Shye, DC
;
Chiou, BS
;
Kuo, MW
;
Chen, JS
;
Chou, BCS
The temperature coefficient of resistance (TCR) characteristics of Pt/(Ba0.8Sr0.2)TiO3 (BST)/Pt thin-film resistors are studied for the BST films with rapid thermal annealing (RTA) treatments. The polarizations induced by bias voltages greatly influence the TCR characteristics. The RTA-treated BST thin film exhibits negative TCR (NTCR) behavior at a negative voltage, but, intriguingly, positive TCR (PTCR) behavior at a positive voltage. According to the leakage current analysis, Schottky emission dominates the negatively biased current at the upper interface, but Heywang barrier scattering confines the positive biased current. (C) 2003 The Electrochemical Society.