2019
DOI: 10.1016/j.apsusc.2019.143887
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Effect of thickness scaling on the permeability and thermal stability of Ta(N) diffusion barrier

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Cited by 20 publications
(10 citation statements)
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“…The sensitivity is reduced with thickness, but it can be very good for evaluation of Ta(N) films deposited as diffusion barriers for microelectronics application (d < 10 nm). It is also apparent that ellipsometry may be efficient for evaluation of d < 100 nm films, as it was in [31,32].…”
Section: Optical Propertiesmentioning
confidence: 99%
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“…The sensitivity is reduced with thickness, but it can be very good for evaluation of Ta(N) films deposited as diffusion barriers for microelectronics application (d < 10 nm). It is also apparent that ellipsometry may be efficient for evaluation of d < 100 nm films, as it was in [31,32].…”
Section: Optical Propertiesmentioning
confidence: 99%
“…Ma et al studied the temperature-dependent dielectric function of TiN films by SE [28]. Recently, Xu et al [31] used the method of comparing the measured the refractive index of low-k film under the Ta(N) diffusion barrier with the refractive index of the blank low-k film to study the integrity of the Ta(N) diffusion barrier using the approach developed by Shamiryan et al [32]. The abbreviation Ta(N), used hereinafter, refers to the complex films containing both Ta and TaN with different nitrogen concentrations.…”
Section: Introductionmentioning
confidence: 99%
“…It is also obvious that ellipsometry will be efficient for evaluation of the d < 100 nm films continuity as it was done in the Ref. [31,32]. The solid curves were calculated by using optical characteristics at 633 nm measured in our films deposited with 12 sccm N2.…”
Section: Optical Propertiesmentioning
confidence: 99%
“…Ma et al have been studied the temperature-dependent dielectric function of TiN films by SE [28]. Recently, Xu et al [31] used the method of comparing the measured refractive index of the low-k film under the Ta(N) diffusion barrier with the refractive index of the blank low-k film to study the integrity of the Ta(N) diffusion barrier using the approach developed by Shamiryan et al [32].…”
Section: Introductionmentioning
confidence: 99%
“…Однако подобная технология приводит к возникновению ряда проблем, одна из которых связана с диффузией атомов Cu в глубь low-k пленки, что приводит к ухудшению диэлектрических свойств материала. Для предотвращения возникновения данного эффекта на поверхность создаваемых в low-k пленках узких тренчей наносят ультратонкие (до 5 nm) барьеры из тугоплавких металлов [1,2], но этому препятствует сложная морфология low-k диэлектриков, низкие значения k которых достигаются за счет наличия в их структуре пор, покрытых гидрофобными CH 3 -группами. Для усиления адгезии атомов металла с диэлектриком необходимо провести предварительную обработку тонкого приповерхностного слоя low-k материалов путем удаления CH 3 -групп, т. е. функционализацию.…”
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