Printing of Nano and Microscale Electronics and Sensors on Flexible and Rigid Substrates

A. Busnaina
Northeastern University,
United States

Keywords: nano electronics, IOT

Summary:

The Internet of Things (IoT) is the network of physical objects embedded with sensors, electronics, software and connectivity with an estimated market of $11 trillion over the next few years. However, these IoT market projections will be significantly accelerated by the availability of ubiquitous low cost sensors. This seminar introduces a new disruptive technology that will enable the fabrication of nanoelectronics at a cost of 10-100 times less than conventional fabrication while allowing device designers to use of any organic or inorganic semiconducting, conductive or insulating material on flexible or rigid substrates. This will also include leveraging nanomaterials such as two-dimensional (2D) materials, quantum dots, nanotubes, etc. Printed electronics can significantly lower electronics and sensor costs; for example, but so far most printed systems are at 20 micron line width and larger and utilizing mostly organic semiconductors. The new technology is enabled by directed assembly-based nanoscale printing at ambient temperature and pressure that prints faster and 1000 smaller (down to 20nm) structures than ink-jet based printing. The technology enables a nanoscale printing platform, enabling heterogeneous integration of interconnected circuit layers (like CMOS) of printed electronics and sensors at ambient temperature and pressure. The directed assembly-based printing processes were specifically created to be scalable, sustainable and designed to enable precise and repeatable control of assembly of various nanoelements at high-rate. These efforts have resulted in over 80 patents in 9 years (20 granted to date). CHN has created processes to direct the assembly of ordered arrays of nanoparticles, conducting polymers, polymer blends, 2D materials and SWNTs into various structures including three dimensional architectures at multiple length scales Using this technology, various nanomaterial based device components such as transistors, chemical and biosensors, and interconnects have been fabricated including 2D materials (MoS2) transistors and inverters. In 2014, the CHN unveiled the world’s first Nanoscale fully-automated offset printing system (NanoOPS) prototype with built-in alignment and registration. This first generation system is designed to print devices and products down to 20 nm or smaller.