Effects of Oven and Laser Sintering Parameters on the Electrical Resistance of IJP Nano-Silver Traces on Mesoporous PET Before and During Fatigue Cycling

2019 ◽  
Author(s):  
G.S. Khinda ◽  
M.Z. Kokash ◽  
M. Alhendi ◽  
M. Yadav ◽  
J.P. Lombardi ◽  
...  
Keyword(s):  
Electrical Resistance ◽  
Laser Sintering ◽  
Fatigue Cycling ◽  
Nano Silver

Reliability of screen-printed conductors and resistors during fatigue cycling on flexible substrate

2019 ◽  
Vol 2019 (1) ◽  
pp. 000139-000146 ◽  
Author(s):  
Behnam Garakani ◽  
K Udara Sandakelum Somarathna ◽  
Darshana L Weerawarne ◽  
Mark D Poliks ◽  
Azar Alizadeh
Keyword(s):  
Flexible Electronics ◽  
Electrical Resistance ◽  
Laser Scanning ◽  
Flexible Substrate ◽  
Thermoplastic Polyurethane ◽  
Confocal Laser ◽  
Extension Rate ◽  
Fatigue Cycling ◽  
Rate Of Increase ◽  
Screen Printed

Abstract Scalable printing of conductor and resistor components has revolutionized the field of flexible electronics by enabling a myriad of low cost highly conformable devices. Flexible electronic devices need to exhibit reliable performance under strenuous mechanical deformations to be adopted in applications such as human and asset monitoring. The reliability of the devices is in turn affected by the microstructure of the materials, manufacturing processes, and conditions of use. In this research, the mechanical behavior and microstructural properties of stretchable silver conductor and stretchable carbon conductor inks on flexible substrate are studied. The test vehicles (such as 4- point probe structures are screen printed on thermoplastic polyurethane (TPU) and cured in a convection oven. The quality of the printed traces including the resolution and thickness profile are measured by Confocal Laser Scanning microscope. The microstructure of the sample including particle/nanoparticles morphology is studied by Scanning Electron Microscopy (SEM). The electrical resistance is measured by 4-point probes method and the sheet resistance of the printed samples is calculated. The mechanical and electrical reliability of the samples are investigated by fatigue-cycling and in-situ measuring of the electrical resistance. In terms of electrical conductivity, the silver printed traces show different behavior compared to the carbon printed samples when exposed to fatigue cycling. The electrical resistance of the printed silver trace increases during the fatigue cycling. Higher extension rate along with higher strain magnitude accelerate the rate of increase in the electrical resistance. The relative electrical resistance of the carbon trace initially drops to 0.7 after 40 cycles and remains constant for the rest of the cycles. The extension rate does not considerably change the electrical resistance of carbon trace. The stability in electrical resistance is crucial in applications where electrical shielding is concerned.

Influence of Post-Processing Methods on the Conductive Properties of Nano-Silver Conductive Ink

2012 ◽  
Vol 189 ◽  
pp. 115-118
Author(s):  
Wei Wei Li ◽  
Li Xin Mo ◽  
Ji Lan Fu ◽  
Wen Bo Li ◽  
Xin Ming Fan ◽  
...  
Keyword(s):  
Surface Resistance ◽  
Laser Sintering ◽  
Silver Layer ◽  
Conductive Ink ◽  
Post Processing ◽  
Sem Images ◽  
Processing Methods ◽  
Nano Silver ◽  
Resistance Decrease ◽  
Conductive Properties

The article prepares the jet ink with nano-silver synthesized by the lab and then adjusts the parameters of the silver colloid to fabricate nano-silver conductive ink suitable for ink-jet. Then patterns are obtained on the photo paper through EPSON ME 70 jet printing, and treated by three post-processing methods include laser sintering, heating, and solution soaking, which measured by four- point probe measurement and observed by SEM. It shows that after treatment the surface resistance of the patterns all decrease obviously. Patterns heated at 120°C for 10min, the resistance is 815mΩ/□, while the surface changes of silver layers can be observed obviously from SEM images. But the surface of the photo paper is destroyed with some bubbles on the coating surface. After 10min of laser sintering, the resistance of the silver layer reaches 890mΩ/□ from infinity. And when immersed in the NaCl solution for 5min, the patterns’ surface resistance decrease to 2.7Ω/□.

scholarly journals Laser sintering of oxidized copper nanoparticles deposited by dry aerosol printing

2021 ◽  
Vol 2086 (1) ◽  
pp. 012019
Author(s):  
D V Kornyushin ◽  
A A Efimov ◽  
A I Buchnev ◽  
E I Kameneva ◽  
V V Ivanov
Keyword(s):  
Laser Radiation ◽  
Copper Nanoparticles ◽  
Electrical Resistance ◽  
Local Treatment ◽  
Laser Sintering ◽  
Specific Electrical Resistance ◽  
Aerosol Printing ◽  
Aerosol Jets ◽  
Semiconductor Arrays ◽  
Nanoparticle Sizes

Abstract Sintering of oxidized copper nanoparticles arrays in the form of lines by the local treatment of laser radiation with wavelengths of 527 nm and 980 nm was studied. To form lines with a width equal to 40–150 μm and a thickness equal to 0.5–4 μm focused aerosol jets with average nanoparticle sizes of 110 and 65 nm were used. The production of semiconductor arrays from oxidized copper nanoparticles with a specific electrical resistance of 2⋅10−3 Ω⋅m using laser radiation with a wavelength of 980 nm was demonstrated.

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