Browsing by Author "HUANG, CJ"

Now showing 1 - 4 of 4

BOLOMETRIC RESPONSE OF HIGH-TEMPERATURE SUPERCONDUCTING THIN-FILMS
(1993-12-01)
MEI, YJ
;
WANG, MW
;
HSIEH, WK
;
CHANG, CY
;
HUANG, CJ
The principles of operation of a bolometer are summarized and responsivity, noise equivalent power and detectivity are derived. The effects of geometrical and material factors on the performance of the bolometer are discussed. The latest developments of high temperature superconducting bolometers are summarized. Experimental results using YBa2Cu3O7-x superconducting thin films as a bolometer are presented. A brief summary of possible future improvements in the performance of the bolometer is finally given.
BOLOMETRIC RESPONSE OF SUPERCONDUCTING YBA2CU3O7-X MICROBRIDGES
(1993-12-01)
HUANG, CJ
;
LIU, RS
;
TSENG, TY
;
電控工程研究所
;
Institute of Electrical and Control Engineering
High-T(c) superconducting bolometers have been presented by using YBa2Cu3O7-x films irradiated an LED source with an 0.94 um wavelength. Using static irradiations, the response occurring in the resistive transition region has been shown and the response mechanism has been studied. A thermal fluction on flux creep behavior can be employed to illustrate the nonlinearly optical I - V characteristics in the low resistive region. However, a dissipative mechanism of flux flow should be used in explaining the best response which reveals a linearly I - V relation in the higher-resistance region. The responsivity examined by a 2 Hz dynamic signal with 0.15 mW is 77 V/W.
PRESSURE EFFECT ON YBA2CU3O7 THIN-FILM GROWTH IN OFF-AXIS RADIO-FREQUENCY MAGNETRON SPUTTERING
(1995-09-01)
WU, SC
;
TSAI, WC
;
HUANG, CK
;
HSU, HT
;
HUANG, CJ
YBa2CU3O7-x (123) thin films were fabricated on (100) MgO substrates by off-axis single target radio frequency (rf) magnetron sputtering. Our study focused on the effect of chamber pressure on the composition, microstructure, and superconductive properties on transition behavior and T-c, of the grown him studied. An empirical formula was derived to explain the dependence of the deposition rate of various components on the pressure. Next, we compared the transport mechanism of the sputtered particles between the off-axis rf and the on-axis direct current sputtering and determined the processing conditions that result in superconducting films of better quality. According to our findings, growth at higher pressures (>100 mTorr) produces more homogeneous and higher T-c superconducting films. (C) 1995 American Vacuum Society.
SYNTHESIS AND CHARACTERIZATION OF BI-PB-SR-CA-CU-O SUPERCONDUCTOR VIA ETHYLENEDIAMINE CHELATING
(1991-01-01)
FRAN, YS
;
KOO, HS
;
CHEN, FH
;
HUANG, CJ
;
TSENG, YT