Electroless Copper Bath Stability Monitoring with UV-VIS Spectroscopy, pH, and Mixed Potential Measurements

2012 ◽  
Vol 159 (7) ◽  
pp. D437-D441 ◽  
Author(s):  
Fumihiro Inoue ◽  
Harold Philipsen ◽  
Alex Radisic ◽  
Silvia Armini ◽  
Yann Civale ◽  
...  
Keyword(s):  
Mixed Potential ◽  
Stability Monitoring ◽  
Vis Spectroscopy ◽  
Electroless Copper ◽  
Bath Stability

scholarly journals In situ Investigation on the Behavior of Mixed Potential in Electroless Copper Plating

2004 ◽  
Vol 20 (02) ◽  
pp. 113-117 ◽  
Author(s):  
Gu Xin ◽  
◽  
Hu Guang-Hui ◽  
Wang Zhou-Cheng ◽  
Lin Chang-Jian
Keyword(s):  
Mixed Potential ◽  
Copper Plating ◽  
Electroless Copper Plating ◽  
Electroless Copper

Electrochemical Kinetics Study of Electroless Copper Plating for Electronics Application

2004 ◽  
Vol 449-452 ◽  
pp. 393-396
Author(s):  
Dae Geun Kim ◽  
Jin Soo Bae ◽  
Jae Ho Lee ◽  
Yang Do Kim ◽  
Yoo Min Ahn
Keyword(s):  
Electrochemical Techniques ◽  
Deposition Process ◽  
Electrolyte Composition ◽  
Electrochemical Kinetics ◽  
Kinetics Study ◽  
Mixed Potential ◽  
Copper Plating ◽  
Electroless Copper Plating ◽  
Electroless Copper

Electroless copper plating was investigated for the electronics applications, such as a metallization for ULSI and MEMS etc. The role of electrolyte composition on the kinetics and mechanism of the electroless copper deposition process was described. Electrochemical techniques were employed for the investigations. The mixed potential and current were determined and then those were compared with experimental deposition rate. The kinetics is strongly influenced by the pretreatment and additive concentrations.

Microstructural changes of Aluminum Nitride after laser irradiation and electroless copper deposition

1994 ◽  
Vol 52 ◽  
pp. 636-637
Author(s):  
S. Cao ◽  
A. J. Pedraza ◽  
L. F. Allard
Keyword(s):  
Aluminum Nitride ◽  
Laser Irradiation ◽  
Electroless Deposition ◽  
Thermal Evaporation ◽  
Surface Region ◽  
Near Surface ◽  
Laser Patterning ◽  
Electroless Copper ◽  
Excimer Laser Irradiation ◽  
Laser Effect

Excimer-laser irradiation strongly modifies the near-surface region of aluminum nitride (AIN) substrates. The surface acquires a distinctive metallic appearance and the electrical resistivity of the near-surface region drastically decreases after laser irradiation. These results indicate that Al forms at the surface as a result of the decomposition of the Al (which has been confirmed by XPS). A computer model that incorporates two opposing phenomena, decomposition of the AIN that leaves a metallic Al film on the surface, and thermal evaporation of the Al, demonstrated that saturation of film thickness and, hence, of electrical resistance is reached when the rate of Al evaporation equals the rate of AIN decomposition. In an electroless copper bath, Cu is only deposited in laser-irradiated areas. This laser effect has been designated laser activation for electroless deposition. Laser activation eliminates the need of seeding for nucleating the initial layer of electroless Cu. Thus, AIN metallization can be achieved by laser patterning followed by electroless deposition.

Modification of optical properties of PC-PBT/Cr2O3 and PC-PBT/CdS nanocomposites by gamma irradiation

2020 ◽  
Vol 92 (2) ◽  
pp. 20402
Author(s):  
Kaoutar Benthami ◽  
Mai ME. Barakat ◽  
Samir A. Nouh
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Band Gap ◽  
Color Difference ◽  
Band Gap Energy ◽  
Polybutylene Terephthalate ◽  
Γ Irradiation ◽  
Gap Energy ◽  
Vis Spectroscopy ◽  
Oxygen Atoms

Nanocomposite (NCP) films of polycarbonate-polybutylene terephthalate (PC-PBT) blend as a host material to Cr2O3 and CdS nanoparticles (NPs) were fabricated by both thermolysis and casting techniques. Samples from the PC-PBT/Cr2O3 and PC-PBT/CdS NCPs were irradiated using different doses (20–110 kGy) of γ radiation. The induced modifications in the optical properties of the γ irradiated NCPs have been studied as a function of γ dose using UV Vis spectroscopy and CIE color difference method. Optical dielectric loss and Tauc's model were used to estimate the optical band gaps of the NCP films and to identify the types of electronic transition. The value of optical band gap energy of PC-PBT/Cr2O3 NCP was reduced from 3.23 to 3.06 upon γ irradiation up to 110 kGy, while it decreased from 4.26 to 4.14 eV for PC-PBT/CdS NCP, indicating the growth of disordered phase in both NCPs. This was accompanied by a rise in the refractive index for both the PC-PBT/Cr2O3 and PC-PBT/CdS NCP films, leading to an enhancement in their isotropic nature. The Cr2O3 NPs were found to be more effective in changing the band gap energy and refractive index due to the presence of excess oxygen atoms that help with the oxygen atoms of the carbonyl group in increasing the chance of covalent bonds formation between the NPs and the PC-PBT blend. Moreover, the color intensity, ΔE has been computed; results show that both the two synthesized NCPs have a response to color alteration by γ irradiation, but the PC-PBT/Cr2O3 has a more response since the values of ΔE achieved a significant color difference >5 which is an acceptable match in commercial reproduction on printing presses. According to the resulting enhancement in the optical characteristics of the developed NCPs, they can be a suitable candidate as activate materials in optoelectronic devices, or shielding sheets for solar cells.

DETERMINATION OF GLYCOL CONTAMINATION IN ENGINE OIL BY INFRARED AND UV-VIS SPECTROSCOPY

2018 ◽  
Author(s):  
Torrey Holland ◽  
Dennis Watson ◽  
P Sivakumar ◽  
Ali Abdul-Munaim ◽  
Robinson Karunanithy
Keyword(s):  
Engine Oil ◽  
Vis Spectroscopy
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