Reducing conducting thin film surface roughness for electronics

phys.org | 3/7/2017 | Staff
aka1aka1 (Posted by) Level 4
Click For Photo: https://3c1703fe8d.site.internapcdn.net/newman/gfx/news/hires/2017/reducingcond.jpg

Surface roughness reduction is a really big deal when it comes to fundamental surface physics and while fabricating electronic and optical devices. As transistor dimensions within integrated circuits continue to shrink, smooth metallic lines are required to interconnect these devices. If the surfaces of these tiny metal lines aren't smooth enough, it substantially reduces their ability to conduct electrical and thermal energy—decreasing functionality.

A group of engineers at the University of Massachusetts Amherst are now reporting an advance this week in Applied Physics Letters, from AIP Publishing, in the form of modeling results that establish electrical surface treatment of conducting thin films as a physical processing method for reducing surface roughness.

Roughness - Problem - Years - Currents - Surface

"We've been thinking hard about this roughness problem for many years, since showing that electric currents can be used to inhibit surface cracking," said Dimitrios Maroudas, co-author and a professor in the Department of Chemical Engineering. "So as soon as we developed the computational tools to attack the full film roughness problem, we got to work."

The group's work focused on using a copper film on a silicon nitride layer to quantify the model parameters for their simulations and make comparisons with available experimental findings, which they were able to reproduce.

Surface - Electromigration - Concept - Maroudas - Transport

"Surface electromigration is the key physical concept involved," Maroudas explained. "It's the directed transport of atoms on the metal surface due to the so-called electron wind force, which expresses the transfer of momentum from the electrons of the metal moving under the action of an electric field to the atoms (ions)—biasing atomic migration."

Think of it as akin to the diffusion of ink in flowing water. "Electromigration's role in the transport of surface atoms is analogous to that of convection due to flow on the transport of ink within the water," Maroudas said. "The combined effects of a well-controlled applied electric field and...
(Excerpt) Read more at: phys.org
16 other people are viewing this story
Wake Up To Breaking News!
Communist, Socialist, Democrat, Republican, at this point, what difference does it make.
Sign In or Register to comment.

Welcome to Long Room!

Where The World Finds Its News!

LongRoom Culture
Man Kayaking Is Surprised By Surfacing Whales! This man is at the right place at the right time.  He must have noticed the...
Adorable Ragdoll Cats Gandalf and Flame Ride Atop A Robot Vacuum Cleaner! These cats are so cute and seem to be content to clean...
Heidi The Australian Shepherd Fetches Her Bed And Settles Down To Watch Planet Earth! This beautiful dog has a very interesting...
Slow Motion Video of Balloon Being Punctured Underwater! Bursting a balloon underwater makes an impressive special effect when...
Amazing Score By Little League Player! When you are running for home and the catcher is waiting there with the ball to tag you,...
Bird Surfs Down Snow Covered Roof, Grabs His "Surfboard," Flies Back Up To The Roof Ridge And Surfs Down Again!
Three Human Kaleidoscope! Brilliant synchronized hand motions that imitate the images you see in a kaleidoscope!  This is very...
One Little, Two Little...Wait... Three Little Kittens All Stretching! It only looks there are two kittens in this container...
Cat Is Rude and Keeps Scratching Sheep's Face, Then Sheep Gets Even! A few rather innocent sniffs and this sheep gets scratched...
Dog Caught Stealing a Bread Roll! Roll?  What Roll?  Oh, you mean this roll...  This dog is so adorable after being caught in...
Cuttlefish Disguised As A Hermit Crab! This cuttlefish is doing a great imitation of a hermit crab as he's trying to make an...
How To Make A Rose Love Letter Card! This paper craft is pretty and clever and could be used for almost every occasion where...
Prairie Dog Wearing A Dress and Eating Cheese! Prairie Dogs make interesting pets and this one is adorable the way it chews on...
Slo Mo Guy's Video Experiment - Getting Crushed by Huge Water Balloon! The popular YouTubers The Slow Mo Guys, are known for...
Teamwork! Two Big Dogs Carrying A Stick Together Followed By A Little Dog! Branch Managers!  These two big black dogs are...
How To Make A Little Teapot Short and Stout! Okay, well, maybe this is a tiny teapot, but that aside, making a tiny teapot is...
Twin Boys Jump At The Same Time and It Looks Like A Mirror Image! These two twin boys are playing and not really paying a lot...
Herd Of Elephants Hurry To Meet New Orphaned Calf! This herd of elephants welcomes a new addition to their herd and they hurry...
Bald Eagle Picks Fish Right Out Of Lake! This bald eagle swoops down out of the sky and grabs this fish.  It has been observed...
Dog Relaxes On Couch! This dog looks like he has plans to stay on the couch for a long time!  He starts sitting up, then falls...
Triple Front Bike Flip by Ryan Williams! This flip called a "Nothing Front Bike Flip" is executed by Ryan Williams in this...
Shot From Medieval War Machine - A Trebuchet! This amazing construction of a medieval war machine called a trebuchet...
Woman Teaching Cow How to Jump Over A Fence! If you don't have a horse, but you have a cow, well, why not teach it to clear a...
Dogs and Raccoons Play Together At This Gathering! A Dog Party?  Oh, wait, no, those are raccoons, too, a dog AND raccoon...
Horse Receiving A Pat Doesn't Want It To Stop! This beautiful horse is welcoming this attention from most likely his owner when...
Cheerleader Collapses In Surprise! This cheerleader who is probably able to turn back-flips and do all sorts of gymnastic moves...
When Just Having a Beautiful Private Pool In Your Backyard Isn't Enough, Add An Endless River Around It!