Browsing by Author "Lin, RJ"

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On the off stoichiometry of cerium oxide thin films deposited by RF sputtering
(1996-04-01)
Chin, CC
;
Lin, RJ
;
Yu, YC
;
Wang, CW
;
Lin, EK
We have studied the stoichiometry of cerium oxide films deposited by RF sputtering as a function of deposition conditions using the resonant Rutherford backscattering method. We found that some films have an off-stoichiometry of CeOy with y greater than 2.0. Such an off-stoichiometry cannot be due to a mixture of the known phases of bulk cerium oxide samples. Those thin samples may have either cerium vacancies or interstitial oxygen atomic impurities. We have tried to determine the valence of the cerium ions by measuring the X-ray photoemission.
Resonant rutherford backscattering studies of cerium oxide thin films deposited by RF sputtering
(1997-06-01)
Chin, CC
;
Lin, RJ
;
Yu, YC
;
Wang, CW
;
Lin, EK
We have studied the stoichiometry of cerium oxide films deposited by RF sputtering on sapphire and MgO as a function of deposition conditions using the resonant Rutherford backscattering method. We found that some films have the off-stoichiometry of CeOy with y greater than 2.0. Such an off-stoichiometry cannot be due to a mixture of the known phases of bulk cerium oxide samples. This may be due to either cerium vacancies or interstitial oxygen atomic impurities. The cerium ion x-ray photoemission spectra of those films cannot determine the vacancy of the cerium ions. The c-axis YBaCuo thin flims deposited by sputtering on the CeO3.3 buffer layer on saphhire was found to be epitaxial. The T-c was 86 K with Delta T-c less than 1 K.
Study of a circularly polarized CPW-fed inductive square slot antenna
(2006-08-01)
Deng, IC
;
Lin, RJ
;
Chang, KM
;
Chen, JB
;
電子工程學系及電子研究所
A novel design of circularly polarized (CP) CPW-fed inductive square-slot antenna is proposed. A right-hand circularly polarized (RHCP) radiation is achieved by an inductive square patch with two adjusted slots and cars. This experimental results show that the bandwidth of 3 dB axial ratio is about 320 MHz (or 13.15%). Prototypes of this proposed antenna is designed for solution of IEEE 802.11 b/g (2.4 GHz). Details of the experimental results are presented and discussed. (c) 2006 Wiley Periodicals, Inc.