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

Nanobiotix: Update on Head and Neck Phase I/II Trial with NBTXR3 and Other program data presented at ImmunoRad 2018 September 20th, 2018

NUS researchers invent new test kit for quick, accurate and low-cost screening of diseases: Test results are denoted by a color change and could be further analyzed by a smartphone app, making it attractive as a point-of-care diagnostic device September 19th, 2018

Silver nanoparticles are toxic for aquatic organisms: A research team at the UPV/EHU-University of the Basque Country has analysed how zebrafish are affected in the long term by exposure to silver particles September 19th, 2018

Leti Announces EU Project to Develop Powerful, Inexpensive Sensors with Photonic Integrated Circuits: REDFINCH Members Initially Targeting Applications for Gas Detection and Analysis For Refineries & Petrochemical Industry and Protein Analysis for Dairy Industry September 19th, 2018

Thin films

Laser sintering optimized for printed electronics: New study sheds (laser) light on the best means of laying down thin-film circuitry September 13th, 2018

Carbon in color: First-ever colored thin films of nanotubes created: A method developed at Aalto University, Finland, can produce large quantities of pristine single-walled carbon nanotubes in select shades of the rainbow; the secret is a fine-tuned fabrication process -- and a s August 29th, 2018

Stress-free ALD from Picosun August 28th, 2018

CTI Materials drives nano commercialization with it's patented surfactant free nanoparticle dispersions August 15th, 2018

Chip Technology

Researchers managed to prevent the disappearing of quantum information September 14th, 2018

New devices based on rust could reduce excess heat in computers: Physicists explore long-distance information transmission in antiferromagnetic iron oxide September 14th, 2018

New photonic chip promises more robust quantum computers September 14th, 2018

How a tetrahedral substance can be more symmetrical than a spherical atom: A new type of symmetry September 14th, 2018

Discoveries

NUS researchers invent new test kit for quick, accurate and low-cost screening of diseases: Test results are denoted by a color change and could be further analyzed by a smartphone app, making it attractive as a point-of-care diagnostic device September 19th, 2018

Silver nanoparticles are toxic for aquatic organisms: A research team at the UPV/EHU-University of the Basque Country has analysed how zebrafish are affected in the long term by exposure to silver particles September 19th, 2018

Researchers develop microbubble scrubber to destroy dangerous biofilms September 19th, 2018

New photonic chip promises more robust quantum computers September 14th, 2018

Announcements

Nanobiotix: Update on Head and Neck Phase I/II Trial with NBTXR3 and Other program data presented at ImmunoRad 2018 September 20th, 2018

NUS researchers invent new test kit for quick, accurate and low-cost screening of diseases: Test results are denoted by a color change and could be further analyzed by a smartphone app, making it attractive as a point-of-care diagnostic device September 19th, 2018

Silver nanoparticles are toxic for aquatic organisms: A research team at the UPV/EHU-University of the Basque Country has analysed how zebrafish are affected in the long term by exposure to silver particles September 19th, 2018

Leti Announces EU Project to Develop Powerful, Inexpensive Sensors with Photonic Integrated Circuits: REDFINCH Members Initially Targeting Applications for Gas Detection and Analysis For Refineries & Petrochemical Industry and Protein Analysis for Dairy Industry September 19th, 2018

Alliances/Trade associations/Partnerships/Distributorships

Leti Announces EU Project to Develop Powerful, Inexpensive Sensors with Photonic Integrated Circuits: REDFINCH Members Initially Targeting Applications for Gas Detection and Analysis For Refineries & Petrochemical Industry and Protein Analysis for Dairy Industry September 19th, 2018

Leti & EFI Aim to Dramatically Improve Reliability & Speed of Low-Cost Electronic Devices for Autos: Project Will Extend Model Predictive Control Technique to Microcontrollers, Digital Signal Processors and Other Devices that Lack Powerful Computation Capabilities September 18th, 2018

Silvaco, Purdue team up to bring scalable atomistic TCAD solutions for next generation semiconductor devices and materials August 24th, 2018

Leti & CMP Announce World’s First Multi-Project-Wafer Service with Integrated Silicon OxRAM: Oxide-Based Resistive Ram Memory Platform Development for Backend Memories To Offer Non-Volatility Associated with Embedded Designs August 2nd, 2018

RFID

Nanowire 'inks' enable paper-based printable electronics: Highly conductive films make functional circuits without adding high heat January 4th, 2017

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

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