Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International

Wikipedia Affiliate Button

Home > Press > Laser sintering optimized for printed electronics: New study sheds (laser) light on the best means of laying down thin-film circuitry

Abstract:
Printed electronics use standard printing techniques to manufacture electronic devices on different substrates like glass, plastic films, and paper. Interest in this area is growing because of the potential to create cheaper circuits more efficiently than conventional methods. A new study by researchers at Soonchunhyang University in South Korea, published in AIP Advances, from AIP Publishing, provides insights into the processing of copper nanoparticle ink with green laser light.

Laser sintering optimized for printed electronics: New study sheds (laser) light on the best means of laying down thin-film circuitry

Washington, DC | Posted on September 13th, 2018

Kye-Si Kwon and his colleagues previously worked with silver nanoparticle ink, but they turned to copper (derived from copper oxide) as a possible low-cost alternative. Metallic inks composed of nanoparticles hold an advantage over bulk metals because of their lower melting points. Although the melting point of copper is about 1,083 degrees Celsius in bulk, according to Kwon, copper nanoparticles can be brought to their melting point at just 150 to 500 C -- through a process called sintering. Then, they can be merged and bound together.

Kwon's group concentrates on photonic approaches for heating nanoparticles by the absorption of light. "A laser beam can be focused on a very small area, down to the micrometer level," explained Kwon and doctorate student Md. Khalilur Rahman. Heat from the laser serves two main purposes: converting copper oxide into copper and promoting the conjoining of copper particles through melting.

A green laser was selected for these tasks because its light (in the 500- to 800-nanometer wavelength absorption rate range) was deemed best suited to the application. Kwon was also curious because, to his knowledge, the use of green lasers in this role has not been reported elsewhere.

In their experiment, his group used commercially available copper oxide nanoparticle ink, which was spin-coated onto glass at two speeds to obtain two thicknesses. The, they prebaked the material to dry out most of the solvent prior to sintering. This is necessary to reduce the copper oxide film thickness and to prevent air bubble explosions that might occur from the solvent suddenly boiling during irradiation. After a series of tests, Kwon's team concluded that the prebaking temperature should be slightly lower than 200 degrees C.

The researchers also investigated the optimal settings of laser power and scanning speed during sintering to enhance the conductivity of the copper circuits. They discovered that the best sintered results were produced when the laser power ranged from 0.3 to 0.5 watts. They also found that to reach the desired conductivity, the laser scanning speed should not be faster than 100 millimeters per second, or slower than 10 mm/s.

Additionally, Kwon and his group investigated the thickness of the film -- before and after sintering -- and its impact on conductivity. Kwon and his group concluded that sintering reduces thickness by as much as 74 percent.

In future experiments, Kwon's team will examine the substrate effects on sintering. Taken together, these studies can provide answers to some of the uncertainties hindering printed electronics.

####

About American Institute of Physics
AIP Advances is a fully open access, online-only, peer-reviewed journal. It covers all areas of applied physical sciences. With its advanced web 2.0 functionality, the journal puts relevant content and discussion tools in the hands of the community to shape the direction of the physical sciences. See https://aip.scitation.org/journal/adv .

For more information, please click here

Contacts:
Rhys Leahy

301-209-3090

Copyright © American Institute of Physics

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

:The article, "Green laser sintering of copper oxide (CuO) nano particle (NP) film to form Cu conductive lines," is written by Md. Khalilur Rahman, Zhao Lu and Kye-Si Kwon. The article appeared in AIP Advances Sept. 11, 2018 (DOI: 10.1063/1.5047562) and can be accessed at:

Related News Press

News and information

Fish-Inspired Material Changes Color Using Nanocolumns March 18th, 2019

New method to reduce uranium concentration in contaminated water March 18th, 2019

Converting biomass by applying mechanical force Nanoscientists discover new mechanism to cleave cellulose effectively and in an environmentally friendly way March 15th, 2019

Exotic “second sound” phenomenon observed in pencil lead: At relatively balmy temperatures, heat behaves like sound when moving through graphite, study reports March 15th, 2019

Thin films

Eco-friendly waterproof polymer films synthesized using novel method October 31st, 2018

Rice U. scientists form flat tellurium: Two-dimensional element shows promise for solar cells and other optoelectronics October 26th, 2018

How to mass produce cell-sized robots: Technique from MIT could lead to tiny, self-powered devices for environmental, industrial, or medical monitoring October 24th, 2018

Extracting energy from a 60 nanometers thin layer October 5th, 2018

Possible Futures

Fish-Inspired Material Changes Color Using Nanocolumns March 18th, 2019

New method to reduce uranium concentration in contaminated water March 18th, 2019

Converting biomass by applying mechanical force Nanoscientists discover new mechanism to cleave cellulose effectively and in an environmentally friendly way March 15th, 2019

Exotic “second sound” phenomenon observed in pencil lead: At relatively balmy temperatures, heat behaves like sound when moving through graphite, study reports March 15th, 2019

Chip Technology

Exotic “second sound” phenomenon observed in pencil lead: At relatively balmy temperatures, heat behaves like sound when moving through graphite, study reports March 15th, 2019

Pushing Past Limits: Junkai Jiang receives prestigious Ph.D. Student Fellowship from IEEE Electron Devices Society March 14th, 2019

Nanometrics Announces $80 Million Share Repurchase Program March 14th, 2019

When semiconductors stick together, materials go quantum: A new study led by Berkeley Lab reveals how aligned layers of atomically thin semiconductors can yield an exotic new quantum material March 12th, 2019

Nanoelectronics

When semiconductors stick together, materials go quantum: A new study led by Berkeley Lab reveals how aligned layers of atomically thin semiconductors can yield an exotic new quantum material March 12th, 2019

Zips on the nanoscale: New method of synthesising nanographene on metal oxide surfaces March 5th, 2019

Large, stable pieces of graphene produced with unique edge pattern: Breakthrough in graphene research February 1st, 2019

Kiel physicists discover new effect in the interaction of plasmas with solids January 18th, 2019

Discoveries

Fish-Inspired Material Changes Color Using Nanocolumns March 18th, 2019

New method to reduce uranium concentration in contaminated water March 18th, 2019

Review of the recent advances of 2D nanomaterials in Lit-ion batteries March 15th, 2019

Converting biomass by applying mechanical force Nanoscientists discover new mechanism to cleave cellulose effectively and in an environmentally friendly way March 15th, 2019

Announcements

Fish-Inspired Material Changes Color Using Nanocolumns March 18th, 2019

New method to reduce uranium concentration in contaminated water March 18th, 2019

Converting biomass by applying mechanical force Nanoscientists discover new mechanism to cleave cellulose effectively and in an environmentally friendly way March 15th, 2019

Exotic “second sound” phenomenon observed in pencil lead: At relatively balmy temperatures, heat behaves like sound when moving through graphite, study reports March 15th, 2019

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Fish-Inspired Material Changes Color Using Nanocolumns March 18th, 2019

New method to reduce uranium concentration in contaminated water March 18th, 2019

Review of the recent advances of 2D nanomaterials in Lit-ion batteries March 15th, 2019

Converting biomass by applying mechanical force Nanoscientists discover new mechanism to cleave cellulose effectively and in an environmentally friendly way March 15th, 2019

Photonics/Optics/Lasers

New blueprint for understanding, predicting and optimizing complex nanoparticles: Guidelines have the potential to transform the fields of optoelectronics, bio-imaging and energy harvesting March 1st, 2019

Hybrid material may outperform graphene in several applications: A structure comprising a molybdenum disulfide monolayer on an azobenzene substrate could be used to build a highly compactable and malleable quasi-two-dimensional transistor powered by light February 28th, 2019

Researchers move closer to practical photonic quantum computing: New method fills critical need to measure large-scale quantum correlation of single photons February 28th, 2019

AIM Photonics Attends OFC 2019—the Optical Networking and Communication Conference & Exhibition to Share World-Class Capabilities and Partnership Opportunity Updates February 28th, 2019

Printing/Lithography/Inkjet/Inks/Bio-printing

New composite advances lignin as a renewable 3D printing material December 28th, 2018

Nanoscribe Presents Successor Model Photonic Professional GT2 for High-Resolution 3D Microfabrication: The first ever production of structures in millimeter size with micrometer precision December 4th, 2018

CEA-Leti Extends 300mm Line and Adds Avenues for Developing Disruptive Technologies: Execution Relies on CEA-Leti’s Fully Implemented Technology With Module-Level Innovations & Devices and Their Architectures December 3rd, 2018

Iran Unveils Its First Homegrown 3D Nano Printer October 17th, 2018

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project