Ultrathin silicon substitute to revolutionize future electronics
London: Scientists have successfully come up with an alternative to silicon that has superior electron mobility and velocity, which makes it an outstanding candidate for future high-speed, low-power electronic devices.
Researchers with the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC), Berkeley, have successfully integrated ultra-thin layers of the semiconductor indium arsenide onto a silicon substrate to create a nanoscale transistor with excellent electronic properties.
“We’ve shown a simple route for the heterogeneous integration of indium arsenide layers down to a thickness of 10 nanometers on silicon substrates,” said Ali Javey.
“The devices we subsequently fabricated were shown to operate near the projected performance limits of III-V devices with minimal leakage current. Our devices also exhibited superior performance in terms of current density and transconductance as compared to silicon transistors of similar dimensions,” he added.
Javey and his collaborators grew single-crystal indium arsenide thin films (10 to 100 nanometers thick) on a preliminary source substrate then lithographically patterned the films into ordered arrays of nanoribbons.
After being removed from the source substrate through a selective wet etching of an underlying sacrificial layer, the nanoribbon arrays were transferred to the silicon/silica substrate via a stamping process.
Although he and his group only used indium arsenide as their compound semiconductor, the technology should readily accommodate other compound III/V semiconductors as well.
“Future research on the scalability of our process for 8-inch and 12-inch wafer processing is needed,” Javey said.
“Furthermore, this concept can be used to directly integrate high performance photodiodes, lasers, and light emitting diodes on conventional silicon substrates. Uniquely, this technique could enable us to study the basic material properties of inorganic semiconductors when the thickness is scaled down to only a few atomic layers.”
The results of this research have been published in the journal Nature.
More from India
More from World
More from Sports
More from Entertaiment
- I eat beef, can somebody stop me?: Kiren Rijiju hits back at Naqvi
- Delhi: Visually impaired boy scores 91.4% in CBSE 12th Board exams
- MP: 14-year-old boy works as bonded labour since 2009
- UP: Man chops off wife's nose, hair for dowry
- Zee Media Exclusive: The plight of yoga expert Tejaswi Sharma
- Heat ave continues in India, death toll climbs to over 1,400
- Woman denied flat in Mumbai for being a Muslim
- 4 Indians in Forbes' 100 most powerful women list
- Megastar Amitabh Bachchan slapped with Rs 1 crore notice
- Gujjar stir: HC asks Rajasthan govt to clear rail track, roads
- Kenyan lawyer offers to marry Barack Obama's daughter Malia
- Gujjar stir: HC asks Rajasthan govt to clear rail track, roads- Part II
- Maggi likely to face ban in India!
- AIB: The 'Third Gender's right to dignity'
- Salman Khan accident files burnt in Mantralaya fire
- CBSE Class 10 Board Result 2015 to be announced today
- Check mahresult.nic.in for MSBSHSE Maharashtra Class 12 HSC Result 2015
- CBSE Class 10 Board Result 2015 (cbse.nic.in, cbseresults.nic.in) postponed?
- Maharashtra MSBSHSE HSC Result 2015 on mahresult.nic.in
- I was misquoted, says Kiren Rijiju on 'beef' remark
- First look: Salman Khan steals thunder in `Bajrangi Bhaijaan`
- Check cbse.nic.in, cbseresults.nic.in for CBSE Class 10 Result 2015
- mahresult.nic.in updated with MSBSHSE Maharashtra HSC Class XII Result 2015
- CBSE Class 10 (Class X Board) Result 2015 on cbse.nic.in, cbseresults.nic.in at 2 pm
- Manmohan Singh defends himself on 2G charge, slams Modi govt for 'carbon copy' schemes
- Sonia Gandhi 'unconstitutional authority' during UPA: PM Narendra Modi
- Hours after attacking NDA govt, Manmohan Singh meets PM Narendra Modi
- Reservation stir: Five percent job quota to Gujjars unlikely, hints Rajasthan govt
- PMO website revamped, now send e-mail to PM Modi directly
- Death toll climbs to over 1400 as intense heatwave continues in India