Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Imec and Holst Centre develop low-temperature organic-inorganic complementary thin-film technology

Complementary TFT: (a) Output characteristics of typical solution-processed oxide and evaporated pentacene transistors, (b) inverter characteristics of the hybrid technology at different power voltages. The inset shows a photograph of an inverter. (c) Cross section of the hybrid technology.
Complementary TFT: (a) Output characteristics of typical solution-processed oxide and evaporated pentacene transistors, (b) inverter characteristics of the hybrid technology at different power voltages. The inset shows a photograph of an inverter. (c) Cross section of the hybrid technology.

Abstract:
Imec and Holst Centre report the fabrication of high-performance solution-processed n-type metal-oxide thin-film transistors (TFTs) after post-annealing at temperatures as low as 250°C. Using these oxide n-TFTs in combination with pentacene p-TFTs, a completely scalable integration process is developed for hybrid inorganic-organic complementary logic on foil. A bidirectional RFID circuit, recently presented at ISSCC, proves the ability of the technology to realize complex, fast and low-voltage circuitry.

Imec and Holst Centre develop low-temperature organic-inorganic complementary thin-film technology

Leuven, Belgium | Posted on March 16th, 2012

The development of a thin-film equivalent for Si CMOS circuitry is one of the key objectives of thin-film electronics. Combining n-channel transistors and p-channel transistors in a CMOS architecture allows low static power dissipation, simplified and more robust circuit design and low noise. A very promising approach to realize complementary thin-film logic is to integrate oxide n-TFTs with organic p-TFTs. The preferred technique to make n-type metal-oxide TFTs is solution-based processing, allowing a simple and high-throughput fabrication process. However, solution processing of metal oxides is typically done at high temperatures (350-500°C), making the technique incompatible with flexible substrates such as polyimide.

Imec and Holst Centre have now demonstrated high-performance solution-based n-type metal oxide TFTs processed directly on polyimide foil and annealed at 250°C. The n-type indium-based oxide transistors were photolithographically fabricated in a bottom Au gate - top Ti S/D contact geometry with channel lengths down to 2-10μm and 100nm of high-k Al2O3 acting as the gate dielectric. The oxide active layer is deposited by spin-coating and subsequently baked in air at a temperature as low as 250°C. Excellent transistor performances have been achieved on polyimide foil with saturation mobilities exceeding 2cm²/Vs, leakage currents below 1pA and Ion/Ioff ratios up to 108. This solution-based unipolar oxide TFT technology is well suited for application in e.g. active-matrix organic light-emitting diode (AMOLED) backplanes.

In a next step, a hybrid organic-inorganic complementary technology has been developed that combines the high-performance n-TFT with a thermally evaporated pentacene p-TFT. The latter has a mobility of up to 1cm2/Vs. A gold layer acts as the gate for both the organic p- and inorganic n-TFT, high-k Al2O3 is used to form the dielectric layer. First, the complementary TFT technology was implemented on a rigid substrate. Using this technology, hybrid complementary circuit building blocks, such as inverters and ring oscillators were realized. Supply voltages as low as 2V resulted in good circuit behavior, indicating that the presented technology is suited for future low-voltage applications. This complementary TFT technology enabled to make the world's first RFID circuit (using TFTs) that allows reader-talks-first communication, as recently presented at ISSCC 2012.

####

For more information, please click here

Contacts:
Barbara Kalkis
Maestro Marketing & PR

Copyright © IMEC

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 News Press

News and information

Chemical trickery corrals 'hyperactive' metal-oxide cluster December 8th, 2016

Researchers peer into atom-sized tunnels in hunt for better battery: May improve lithium ion for larger devices, like cars December 8th, 2016

Scientists track chemical and structural evolution of catalytic nanoparticles in 3-D: Up-close, real-time, chemical-sensitive 3-D imaging offers clues for reducing cost/improving performance of catalysts for fuel-cell-powered vehicles and other applications December 8th, 2016

Exotic insulator may hold clue to key mystery of modern physics: Johns Hopkins-led research shows material living between classical and quantum worlds December 8th, 2016

In IEDM 2016 Keynote, Leti CEO Says ‘Hyperconnectivity’, Human-focused Research and the IOT Promise Profound, Positive Changes December 7th, 2016

Thin films

ANU invention to inspire new night-vision specs December 7th, 2016

Ultra-thin ferroelectric material for next-generation electronics October 12th, 2016

Continuous roll-process technology for transferring and packaging flexible LSI August 29th, 2016

Chip Technology

Chemical trickery corrals 'hyperactive' metal-oxide cluster December 8th, 2016

Leti IEDM 2016 Paper Clarifies Correlation between Endurance, Window Margin and Retention in RRAM for First Time: Paper Presented at IEDM 2016 Offers Ways to Reconcile High-cycling Requirements and Instability at High Temperatures in Resistive RAM December 6th, 2016

Tokyo Institute of Technology research: 3D solutions to energy savings in silicon power transistors December 6th, 2016

Physicists decipher electronic properties of materials in work that may change transistors December 6th, 2016

Discoveries

Chemical trickery corrals 'hyperactive' metal-oxide cluster December 8th, 2016

Researchers peer into atom-sized tunnels in hunt for better battery: May improve lithium ion for larger devices, like cars December 8th, 2016

Scientists track chemical and structural evolution of catalytic nanoparticles in 3-D: Up-close, real-time, chemical-sensitive 3-D imaging offers clues for reducing cost/improving performance of catalysts for fuel-cell-powered vehicles and other applications December 8th, 2016

Exotic insulator may hold clue to key mystery of modern physics: Johns Hopkins-led research shows material living between classical and quantum worlds December 8th, 2016

Announcements

Chemical trickery corrals 'hyperactive' metal-oxide cluster December 8th, 2016

Researchers peer into atom-sized tunnels in hunt for better battery: May improve lithium ion for larger devices, like cars December 8th, 2016

Scientists track chemical and structural evolution of catalytic nanoparticles in 3-D: Up-close, real-time, chemical-sensitive 3-D imaging offers clues for reducing cost/improving performance of catalysts for fuel-cell-powered vehicles and other applications December 8th, 2016

Exotic insulator may hold clue to key mystery of modern physics: Johns Hopkins-led research shows material living between classical and quantum worlds December 8th, 2016

Alliances/Trade associations/Partnerships/Distributorships

Infrared instrumentation leader secures exclusive use of Vantablack coating December 5th, 2016

Leti and Grenoble Partners Demonstrate World’s 1st Qubit Device Fabricated in CMOS Process: Paper by Leti, Inac and University of Grenoble Alpes Published in Nature Communications November 28th, 2016

Mechanism for sodium storage in 2-D material: Tin selenide is an effective host for storing sodium ions, making it a promising material for sodium ion batteries October 27th, 2016

Enterprise In Space Partners with Sketchfab and 3D Hubs for NewSpace Education October 13th, 2016

RFID

Conformal transfer of graphene for reproducible device fabrication August 11th, 2015

GLOBALFOUNDRIES Launches Industry’s First 22nm FD-SOI Technology Platform: 22FDX offers the best combination of performance, power consumption and cost for IoT, mainstream mobile, RF connectivity, and networking July 13th, 2015

New micro-supercapacitor structure inspired by the intricate design of leaves: A team of scientists in Korea has devised a new method for making a graphene film for supercapacitors July 2nd, 2015

Designer electronics out of the printer: Optimized printing process enables custom organic electronics June 16th, 2015

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




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project