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ATLASS Report Summary

Project ID: 646130
Funded under: H2020-EU.

Periodic Reporting for period 1 - ATLASS (Advanced high-resolution printing of organic Transistors for Large Area Smart Surfaces)

Reporting period: 2015-03-01 to 2016-08-31

Summary of the context and overall objectives of the project

Bringing intelligence and communication to everyday objects is a major challenge for future electronics. This «Internet of Things » concept envisions wide dissemination of new type of electronics, integrated in many objects or components of our life, with new expected performances: robustness at physical and connection level, large area, flexibility of electronics (, eco-efficient and cheaper sensors that can be produced in important quantities.

ATLASS project, funded by the European Commission wants to push forward the printed organic electronics on flexible substrate through a major technology jump driving the size of printed circuits, transistors and thus sensors to smaller scales, towards micro and nano scale, still with high performance and high definition.

ATLASS takes this huge step by bringing high resolution technologies to the printing industries for the demonstration of products in high impact markets.

Printed organic electronics require new multifunctional high-performing inks (semiconductor mobility >1cm2/Vs, dielectrics, ferroelectrics) and high-resolution (down to 500nm and ~100nm thickness) and go through specific Roll-to-Roll and Sheet-to-Sheet printing processe, including nano-imprinting and gravure printing.

These specific printing processes are being engineered and scaled-up on pre-industrial lines across Europe, and will seek to produce high performance devices (speed ~ 10 MHz).

In order to ensure high quality and high yield in the production process, in-line control and novel automatic optical inspection tools and methodologies are being studied and be installed to ramp-up the yield of developed processes (>99%). It will enable a production in broader quantities, and thus diminish the fabrication cost of advanced circuits (>1000 transistors, 50 kHz clock rate).

The technology capability is benchmarked with conventional organic electronics process and will be demonstrated with four applications in the field of Interactive objects and Sensing surfaces:
- A temperature tag for food packaging should be able to display the current temperature of the conditioning, showing the food is kept in non degraded condition
- Electronics labelling for logistics will help track packages and objects in warehouses
- Force sensing foils will help improve the crash test measurments in automotive safety design
- Proximity or touch sensing for human-robot will help improve cobotics and interaction in industrial or daily-life applications.

The main objectives of the project are to:
- identify new inks and ferroelectric fluoropolymer in order to improve teh quality and purity of the materials, thus improving the reproducitibility of the fabrication (stability, reliability) and increase the produced volumes
- lower the size of printed features of electronics through roll-to-roll and sheet-to-sheet printing processes
- improve the circuit yield and quality and lower the defectivity by improving the optical inspection tools
- improve the self-aligniment techniques during the process of building up and printing the transistors
- demonstrate large area printed sensors, typically integrated in a passive-matrix front-plane with obvious limitations – that will profit from the combination with the ATLASS high-performance OTFT active-matrix backplanes in terms of unambiguous pixel addressing, fast switching, crosstalk reduction and high signal-to-noise ratio level (>10dB).

Work performed from the beginning of the project to the end of the period covered by the report and main results achieved so far

AT_4000, AT_2000, AT_800 and AT_Base are four technological routes that will improve the various printing processes, materials, shrinking of circuits along the project. See for more details

Below are the major activities performed in the 1st period of the

-- Materials:
AT_4000 route:
- Inks have been formulated for dielectrics and are meeting the initial targets and parameters (smoothness, viscosity and thickness, voltage and yield)
- Generation 2 OSC inks have been developed for AT_4000 route
- Formulation of piezoelectric copolymers and ink production process validated with improvement of printability (viscosity, purity)

AT_2000: work on the next generation of OSC

-- Printing process: Front-end
Printability evaluation Modules have been created, Roll-to-roll tools fabricated and adjusted, several runs have been made, several µm gate dielectric (thin and strong) printed, roll-to-roll application of lift-off resist, yield analysis by optical inspection

-- Printing process: High-resolution Sheet-to-sheet
Master and Gravure rollers transistor evaluation modules have been designed, and rollers fabricated for AT_4000 and shrinking AT_2000 route, with optimisation of software platform : several µm drop in results (reproducible). Alternative engraving technis have been introduced.

-- Characterisation & in-line control:
Design of the transistor evaluation modules & first approach for in-line characterisation tools for sheet-to-sheet process (image acquisition and data visualisation), design rule kit devloped and design rule manual, first life-cycle analysis of the processes

-- Integration of sub-systems
Design of the layouts for temperature sensor, EPD backplane for intelligent label, for pressure and pyro sensors frontplane
Design of layout of IR lenses
Manufacture and tests of pressure and pyro sensor cells
Organic transistors impact tests

-- Demonstration scenarios
Specifications for Smart printed temperature sensor, Printed intelligent label, Printed pressure sensor, Printed pyroelectric sensor
AT_Base design for Printed pressure sensor & Printed pyroelectric sensor

-- ATLASS Workshop
Benchmark and analysis of TOLAE frameworkprogramme projects
Website, logo and flyer design and implementation

Progress beyond the state of the art and expected potential impact (including the socio-economic impact and the wider societal implications of the project so far)


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