3-D Printing of Flexible Two Terminal Electronic Memory Devices
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MRS Advances © 2018 Materials Research Society DOI: 10.1557/adv.2018.38
3-D Printing of Flexible Two Terminal Electronic Memory Devices Salah Maswoud, Shashi Paul, Iulia Salaoru
i
Emerging Technologies Research Centre,
De Montfort University, The Gateway, Leicester LE1 9RH, UK i
Contact author’s email: [email protected]
ABSTRACT
Recent strategy in the electronics sector is to ascertain the ways to make cheap, flexible and environmentally friendly electronic devices. The 3D inkjet printing technology is based on the Additive Manufacturing concept and it is with no doubt capable of revolutionising the whole system of manufacturing electronic devices including: material selection; design and fabrication steps and device configuration and architecture. Thus, 3D inkjet printing technology (IJP) is not only one of the most promising technologies to reduce the harmful radiation/ heat generation but also achieve reductions in manufacturing cost. Here, we explore the potential of 3D – inkjet printing technology to provide an innovative approach for electronic devices in especially information storage elements by seeking to manufacture and characterise state-of-art fully inkjet printed two terminal electronic memory devices. In this work, ink-jettable materials (Ag and PEDOT:PSS) were printed by a piezoelectric Epson Stylus P50 inkjet printing machine on a flexible substrate. All components of the memory cells of a simple metal/active layer/metal structure were deposited via inkjet printing. The quality of the printed layers was first assessed by Nikon LABOPHOT-2 optical microscope, fitted with Nikon Camera DS-Fi1. Furthermore, an in-depth electrical characterisation of the fabricated memory cells was carried out using HP4140B picoammeter.
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INTRODUCTION Inkjet printing is one of the Additive Manufacturing [1] techniques which forms, controls and deposits tiny droplets of inks onto the substrate. The 3D printing technology is undoubtedly able to revolutionise the electronic device manufacture industry, which includes the materials selection, design, fabrication steps and device configuration/structure. The three main components are involved in this technology: ink, printhead (cartridge) and substrate. The appropriate functionality/properties of these components such as: ink properties, right driving voltage waveform (pulse amplitude/width) and the suitable substrate will ensure a high quality printed pattern and a reliable and a reproducible process. The factors driving this continuous interest are mainly attributed to digital and additive patterning, its efficiency in material use, large area capability, low cost, compatibility with rigid/flexible substrates. Thus, in the recent past, the inkjet printing deposition method has been increasingly and extensively researched as an alt
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