Ultra-Thin (AlCrTaTiZr)Nx/AlCrTaTiZr Bilayer Structures of High Diffusion Resistance to Cu Metallization

1993 ◽  
Vol 331 ◽  
Author(s):  
Erik Einar Hancock ◽  
Linda Griffith Cima

AbstractEncapsulated cells are likely to encounter transport limitations of trace nutrients carried by macromolecules due to a high diffusion resistance in the encapsulating membrane. We modeled the transport of transferrin to encapsulated cells and found that the transport limitation of transferrin is potentially significant in comparison to oxygen, which is limiting in unencapsulated tissue. Since transferrin is the primary biological iron carrier, deprivation of transferrin to encapsulated cells may limit long term function and viability in vivo.


2020 ◽  
Vol 22 (11) ◽  
pp. 2000557
Author(s):  
Rongbin Li ◽  
Tongtong Chen ◽  
Chunxia Jiang ◽  
Jing Zhang ◽  
Yong Zhang ◽  
...  

2018 ◽  
Vol 748 ◽  
pp. 258-264 ◽  
Author(s):  
Rongbin Li ◽  
Bangwei Qiao ◽  
Hailong Shang ◽  
Jing Zhang ◽  
Chunxia Jiang ◽  
...  

2011 ◽  
Vol 205 (21-22) ◽  
pp. 5064-5067 ◽  
Author(s):  
Du-Cheng Tsai ◽  
Yen-Lin Huang ◽  
Sheng-Ru Lin ◽  
De-Ru Jung ◽  
Shou-Yi Chang ◽  
...  

Author(s):  
J. R. Michael ◽  
A. D. Romig ◽  
D. R. Frear

Al with additions of Cu is commonly used as the conductor metallizations for integrated circuits, the Cu being added since it improves resistance to electromigration failure. As linewidths decrease to submicrometer dimensions, the current density carried by the interconnect increases dramatically and the probability of electromigration failure increases. To increase the robustness of the interconnect lines to this failure mode, an understanding of the mechanism by which Cu improves resistance to electromigration is needed. A number of theories have been proposed to account for role of Cu on electromigration behavior and many of the theories are dependent of the elemental Cu distribution in the interconnect line. However, there is an incomplete understanding of the distribution of Cu within the Al interconnect as a function of thermal history. In order to understand the role of Cu in reducing electromigration failures better, it is important to characterize the Cu distribution within the microstructure of the Al-Cu metallization.


2020 ◽  
Vol 117 (6) ◽  
pp. 610
Author(s):  
Nadia Hammouda ◽  
Kamel Belmokre

Organic coatings are widely employed in the corrosion protection of most metal surfaces, particularly steel. They provide a barrier against corrosive species present in the environment, due to their high resistance to oxygen, water and ions transport. This study focuses on the evaluation of corrosion protection performance of epoxy paint on the carbon steel surface in chloride environment (3% NaCl) by Electrochemical Impedance Spectroscopy (EIS). The electrochemical behavior of painted surface was estimated by EIS parameters that contained paint film resistance, paint film capacitance and double layer capacitance. On the basis of calculation using EIS spectrums it was observed that pore resistance (Rpore) decreased with the appearance of doubled layer capacitance (Cdl) due to the electrolyte penetration through the film. This was further confirmed by the decrease of diffusion resistance (Rd) which was also the indicator of the deterioration of paint film protectiveness. Microscopic analyses have shown that oxidation dominates the corroded surfaces.


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