TY - JOUR

T1 - Electron cyclotron resonance deposition, structure, and properties of oxygen incorporated hydrogenated diamondlike amorphous carbon films

AU - Adamopoulos, George

AU - Godet, C.

AU - Zorba, T.

AU - Paraskevopoulos, K. M.

AU - Ballutaud, D.

PY - 2004

Y1 - 2004

N2 - Oxygen-incorporated hydrogenated amorphous carbon films were grown by the integrated distributed electron cyclotron resonance plasma technique from a mixture of acetylene and oxygen. It has been found that the increase of the oxygen to acetylene gas ratio results in more oxygen incorporation up to O/(O+C)=0.2 with a decrease in the hydrogen concentration within the film as measured by the nuclear reaction analysis (NRA) and a combination of the elastic recoil detection analysis and Rutherford backscattering techniques. The spectroscopic ellipsometry in the range of 1.5-5 eV showed a negligible decrease of the E(04) optical band gap for increasing the oxygen content. At the same time, the decrease of the refractive index from 2.2 to 2.0 denotes the decrease of the films density, which was independently estimated by NRA. The visible (488 nm) Raman spectroscopy showed that the increase of the oxygen content favors the clustering of the six-fold sp(2)C rings. The Fourier transform infrared spectroscopy gives evidence of both C-O and C=O bonding configurations. No evidence of O-H bonds formation is found. Simultaneously, the chemisorption of CO(2) seems to increased with increasing the oxygen to acetylene gas ratio, which is consistent with the lower film density. The previously trends denote the "softening" of the films, which is consistent with the significant decrease (of about 35%) of the compressive stress allowing the growth of thicker but still transparent films.

AB - Oxygen-incorporated hydrogenated amorphous carbon films were grown by the integrated distributed electron cyclotron resonance plasma technique from a mixture of acetylene and oxygen. It has been found that the increase of the oxygen to acetylene gas ratio results in more oxygen incorporation up to O/(O+C)=0.2 with a decrease in the hydrogen concentration within the film as measured by the nuclear reaction analysis (NRA) and a combination of the elastic recoil detection analysis and Rutherford backscattering techniques. The spectroscopic ellipsometry in the range of 1.5-5 eV showed a negligible decrease of the E(04) optical band gap for increasing the oxygen content. At the same time, the decrease of the refractive index from 2.2 to 2.0 denotes the decrease of the films density, which was independently estimated by NRA. The visible (488 nm) Raman spectroscopy showed that the increase of the oxygen content favors the clustering of the six-fold sp(2)C rings. The Fourier transform infrared spectroscopy gives evidence of both C-O and C=O bonding configurations. No evidence of O-H bonds formation is found. Simultaneously, the chemisorption of CO(2) seems to increased with increasing the oxygen to acetylene gas ratio, which is consistent with the lower film density. The previously trends denote the "softening" of the films, which is consistent with the significant decrease (of about 35%) of the compressive stress allowing the growth of thicker but still transparent films.

KW - A-C-H

KW - OPTICAL-PROPERTIES

KW - NITRIDE FILMS

KW - PLASMA DEPOSITION

U2 - 10.1063/1.1804624

DO - 10.1063/1.1804624

M3 - Journal article

VL - 96

SP - 5456

EP - 5461

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 10

ER -