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Capillary pen writing for

printed electronicsMd Mahabub Hossain

2013435034

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Printed electronics

A set of printing methods used to createelectrical devices such as photovoltaics,displays, batteries and sensors on various

substrates.The term printed electronics is actually

related to organic electronics or plasticelectronics.

Photopolymer flexography printing plate

Printing techniques are

Nano-imprinting

Solid state embossing

Screen printing

Inkjet printing

Roll to roll printing

Photo of electrical devices, nano-imprintedon polyimide substrate. Opticalmicrograph of electrical structures (source-drain electrodes formultichannel transistors) on a polyimide substrate fabricated by directnano-imprinting of gold nanoparticle solution.

Nozzle based printing

Direct-writing approach

Rollerball pen

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Limitation of existing techniquesRollerball pen method, a rollerball pen filled with conductive silver ink.

Inherent technical limitations that restrict its commercial applicability:

To dispense ink from pen, asufficient frictional pressurebetween ball and substrate mustbe generated. The requiredoperational pressures candamage surfaces and reduce thedielectric performances of softsubstrate materials, such aspolymers.

Substrate must be sufficientlyrough.

The rough surface in an organicdielectric component cansignificantly affect the electricalperformance of a device.

a) Optical image of a rollerball pen loaded with a conductive silver ink, text written onXerox paper. b and c) SEM images of the side and top views of the rollerball pen. d)Optical image of the rollerball pen tip, captured during writing a conductive silvertrack on a Xerox paper.Inkjet printing technique

Few drawbacks that limits itsapplicability to certain commercial-purpose printing.Organic inks are highly sensitive to thejetting condition, including thetemperature, viscosity, concentration,and humidity.

The process of drop drying after deposition with inkjet printing

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