PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

Are diamonds GaN’s best friend? Revolutionizing transistor technology

Fabrication of a gallium nitride transistor using a diamond substrate that has twice the heat dissipation properties in comparison to silicon carbide.

Are diamonds GaN’s best friend? Revolutionizing transistor technology
2023-12-21
(Press-News.org)

Researchers at Osaka Metropolitan University are proving that diamonds are so much more than just a girl’s best friend. Their groundbreaking research focuses on gallium nitride (GaN) transistors, which are high-power, high-frequency semiconductor devices used in mobile data and satellite communication systems. With the increasing miniaturization of semiconductor devices, problems arise such as increases in power density and heat generation that can affect the performance, reliability, and lifetime of these devices. Therefore, effective thermal management is crucial. Diamond, which has the highest thermal conductivity of all natural materials, is an ideal substrate material but has not yet been put to practical use due to the difficulties of bonding diamond to GaN elements.

A research team led by Associate Professor Jianbo Liang and Professor Naoteru Shigekawa of the Graduate School of Engineering at Osaka Metropolitan University has successfully fabricated GaN High Electron Mobility Transistors using diamond as a substrate. This novel technology has more than twice the heat dissipation performance of transistors of the same shape fabricated on a silicon carbide (SiC) substrate. To maximize the high thermal conductivity of diamond, the researchers integrated a 3C-SiC layer, a cubic polytype of silicon carbide, between GaN and diamond. This technique significantly reduces the thermal resistance of the interface and improves heat dissipation.

“This new technology has the potential to significantly reduce CO2 emissions and potentially revolutionize the development of power and radio frequency electronics with improved thermal management capabilities,” said Professor Liang.

Their findings were published in Small.

 

###

About OMU 
Osaka Metropolitan University is the third largest public university in Japan, formed by a merger between Osaka City University and Osaka Prefecture University in 2022. OMU upholds "Convergence of Knowledge" through 11 undergraduate schools, a college, and 15 graduate schools. For more research news visit https://www.omu.ac.jp/en/ or follow us on Twitter: @OsakaMetUniv_en, or Facebook. 

END


[Attachments] See images for this press release:
Are diamonds GaN’s best friend? Revolutionizing transistor technology Are diamonds GaN’s best friend? Revolutionizing transistor technology 2 Are diamonds GaN’s best friend? Revolutionizing transistor technology 3

ELSE PRESS RELEASES FROM THIS DATE:

New study examines the relationship between the rate of wound healing, the circadian rhythm, and ‘hair’ on cells

New study examines the relationship between the rate of wound healing, the circadian rhythm, and ‘hair’ on cells
2023-12-21
Nearly every organism on Earth follows a natural circadian rhythm that is coded by your cell’s clock genes, which do exactly as you suspect from the name: regulate your body’s rhythm on a 24-hour basis. Most cells in mammalian bodies have cilia of some sort, which are hair-like structures that perform a variety of functions such as movement for motile cilia and aiding in structure in function for non-motile, or primary, cilia. The primary cilia also act as a sensory organ for the cell, a function which has illuminated ...

Great British Bake Off Christmas desserts not as naughty as you may think

2023-12-21
Christmas desserts from The Great British Bake Off are more likely to use ingredients that are associated with reductions, rather than increases, in the risk of death or disease, suggests research published in the Christmas issue of The BMJ. As the holiday season approaches, the age-old debate resurfaces: can we indulge in Christmas desserts without feeling the pang of guilt? Can we look past the negative headlines of what butter and sugar do to our bodies, and enjoy a piece of Christmas cake in heavenly peace? To answer this Christmas conundrum, researchers set out to determine ...

Spike in morning after pill sales in the U.S. after New Year celebrations

2023-12-21
Sales of emergency contraception are estimated to rise by around 10% in the US in the week after the New Year holiday, suggesting that this period is associated with increased risks of unprotected sex compared with other holidays, finds a study published in the Christmas issue of The BMJ. Other holidays such as Valentine’s Day and Independence Day were also associated with an increase in sales, but to a lesser extent. Although this annual spike in sales might seem humorous, the researchers point out that as many US states have increased restrictions on abortion ...

The evolutionary timeline of diminished boric acid and urea transportation in aquaporin 10

The evolutionary timeline of diminished boric acid and urea transportation in aquaporin 10
2023-12-21
Aquaporin (Aqp) 10 water channels in humans allow the free passage of water, glycerol, urea, and boric acid across cells. However, Aqp10.2b in pufferfishes allows only the passage of water and glycerol and not urea and boric acid. Researchers from the Tokyo Institute of Technology sought to understand the evolutionary timeline that resulted in the variable substrate selection mechanisms among Aqp10s. Their results indicate that Aqp10.2 in ray-finned fishes may have reduced or lost urea and boric acid permeabilities through evolution. Aquaporins ...

Wildflowers increasingly doing without insect pollinators

Wildflowers increasingly doing without insect pollinators
2023-12-21
Scientists at the CNRS and the University of Montpellier1 have discovered that flowering plants growing in farmland are increasingly doing without insect pollinators. As reproduction becomes more difficult for them in an environment depleted in pollinating insects, the plants are evolving towards self-fertilisation. These findings are published in a paper in the journal New Phytologist dated December 20, 2023. By comparing field pansies growing in the Paris region today with pansies from the same localities resurrected in the laboratory from seeds collected2 between 1992 and 2001, the research team found that today's flowers are 10% smaller, produce 20% less nectar, and are less ...

Blue PHOLEDs: Final color of efficient OLEDs finally viable in lighting

2023-12-21
Dec. 20, 2023 Contact: Derek Smith, 734-546-3632, smitdere@umich.edu; Nicole Casal Moore, 734-709-1651, ncmoore@umich.edu   ANN ARBOR—Lights could soon use the full color suite of perfectly efficient organic light-emitting diodes, or OLEDs, that last tens of thousands of hours, thanks to an innovation from physicists and engineers at the University of Michigan. The U-M team's new phosphorescent OLEDs, commonly referred to as PHOLEDs, can maintain 90% of the blue light intensity for 10-14 times longer than other designs that emit similar deep blue colors. That kind ...

Multitasking microbes: UW–Madison scientists engineer bacteria to make two valuable products from plant fiber

Multitasking microbes: UW–Madison scientists engineer bacteria to make two valuable products from plant fiber
2023-12-20
We often look to the smallest lifeforms for help solving the biggest problems: Microbes help make foods and beverages, cure diseases, treat waste and even clean up pollution. Yeast and bacteria can also convert plant sugars into biofuels and chemicals traditionally derived from fossil fuels — a key component of most plans to slow climate change. Now University of Wisconsin–Madison researchers have engineered bacteria that can produce two chemical products at the same time from underutilized plant fiber. And unlike humans, these ...

And now, your community health forecast…

2023-12-20
In the not-so-distant future, people might be able to tune in to their favorite news source for an update on their community health status, just as they check on the local weather forecast. The community health status is similar to the color-coded Doppler weather data that provides meteorologists with information about rain, snow or hail, its motion and intensity, which they can use to determine specific areas where dangerous weather conditions exist. Having this information has proven to be a valuable tool to protect life and property. “The new community ...

A framework in your brain for organising the order of things

A framework in your brain for organising the order of things
2023-12-20
Scientists at NTNU’s Kavli Institute for Systems Neuroscience in Norway have discovered a pattern of activity in the brain that can serve as a template for building sequential experiences. “I believe we have found one of the brain’s prototypes for building sequences” says Professor Edvard Moser.He describes the activity pattern as “a fundamental algorithm that is intrinsic to the brain and independent of experience.” The breakthrough discovery was published in Nature 20. December 2023. The ability to organise elements into sequences ...

Benidipine calcium channel blocker improves cigarette smoke-induced lung emphysema

Benidipine calcium channel blocker improves cigarette smoke-induced lung emphysema
2023-12-20
A new research paper was published in Aging (listed by MEDLINE/PubMed as "Aging (Albany NY)" and "Aging-US" by Web of Science) Volume 15, Issue 23, entitled, “Benidipine calcium channel blocker promotes the death of cigarette smoke-induced senescent cells and improves lung emphysema.” Smoking is the main risk factor for many lung diseases including chronic obstructive pulmonary disease. Cigarette smoke (CS) contains carcinogenic and reactive oxygen species that favor DNA mutations and perturb the homeostasis and environment of cells. CS induces lung cell senescence resulting in a stable proliferation arrest and a senescence-associated ...

LAST 30 PRESS RELEASES:

Signs identified that precede sudden arrhythmic death syndrome in young people

Discovery of bacteria's defence against viruses becomes a piece of the puzzle against resistance

Pre-eclampsia is associated with earlier onset and higher incidence of cardiovascular risk factors

Warwick astronomers discover doomed pair of spiralling stars on our cosmic doorstep

Soil conditions significantly increase rainfall in world’s megastorm hotspots

NK cells complexed with bispecific antibody yield high response rates in patients with lymphoma

Planetary health diet and mediterranean diet associated with similar survival and sustainability benefits

Singapore launches national standard to validate antimicrobial disinfectant products

Molecular stool test could improve detection of tuberculosis in adults with HIV

Suspected fibrocartilaginous embolus in Asian small-clawed otter (Aonyx cinereus)

Enhancing heat transfer using the turbulent flow of viscoelastic fluids

Exercise as an anti-ageing intervention to avoid detrimental impact of mental fatigue

UMass Amherst Nursing Professor Emerita honored as ‘Living Legend’

New guidelines aim to improve cystic fibrosis screening

Picky eaters by day, buffet by night: Butterfly, moth diets sync to plant aromas

Pennington Biomedical’s Dr. Leanne Redman honored with the E. V. McCollum Award from the American Society for Nutrition

CCNY physicists uncover electronic interactions mediated via spin waves

Researchers’ 3D-printing formula may transform future of foam

Nurture more important than nature for robotic hand

Drug-delivering aptamers target leukemia stem cells for one-two knockout punch

New study finds that over 95% of sponsored influencer posts on Twitter were not disclosed

New sea grant report helps great lakes fish farmers navigate aquaculture regulations

Strain “trick” improves perovskite solar cells’ efficiency

How GPS helps older drivers stay on the roads

Estrogen and progesterone stimulate the body to make opioids

Dancing with the cells – how acoustically levitating a diamond led to a breakthrough in biotech automation

Machine learning helps construct an evolutionary timeline of bacteria

Cellular regulator of mRNA vaccine revealed... offering new therapeutic options

Animal behavioral diversity at risk in the face of declining biodiversity

Finding their way: GPS ignites independence in older adult drivers

[Press-News.org] Are diamonds GaN’s best friend? Revolutionizing transistor technology
Fabrication of a gallium nitride transistor using a diamond substrate that has twice the heat dissipation properties in comparison to silicon carbide.