Printed Electronics with High Performance Solution Processed Nanocomposite Gate Insulator (Printed Electronics USA 2006)

High performance nanocomposite dielectric material was demonstrated as a gate insulator for printed electronics applications. A nanocomposite consisting of cross-linked Propylene Glycol Methyl Ether Acetate and Barium Titanate (BTO) nanoparticles was developed and utilized as the gate insulator. The high permittivity (k=35), bimodal nanocomposite utilized had two different filler particle sizes; 200 nm. and 1000 nm. diameter particles. Due to the nanosize of the BTO particles, they disperse well in the organic solvent, which makes it possible to use solution-processable methods, such as printing to fabricate the devices.

 

Bottom gate organic filed effect transistors (OFETs) were demonstrated using a combination of pad printing and spray coating technologies. An aluminum coated Mylar film was used as the flexible gate substrate. An amorphous organic semiconductor was utilized as the active layer to evaluate the dielectric properties of room temperature, solution-processed OFET devices. The use of an amorphous semiconductor material enabled a more consistent nanocomposite gate insulator evaluation since morphology effect can be largely neglected. It was demonstrated that OFETs with the nanocomposite dielectric layer have higher field-induced current than that of conventional devices due to the high dielectric constant of the gate insulator.

My career at Motorola started in 1993 when I joined the Automotive, Energy and Controls Group. I spent two years developing Multi Flip Chip On Flex technology for automotive applications.

 

I spent five years as a member of the Materials for Advanced Electronics group at Motorola Labs - Motorola Advanced Technology Center. I was part of the high density interconnection (HDI) development team at Motorola.

 

Most recently, I have been working on printed electronics applications and the utilization of nanotechnology in Motorola products. In addition to focusing on RF components as possible candidates to printed electronics implementation, I am actively investigating the utilization of Nanocomposites to reduce the operating voltage of printed organic devices.

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