MichiganState University
Science at the Edge
Engineering Seminar
*February 13^th , 2015*
11:30 a.m., Room1400 Biomedical and Physical Sciences Building
Refreshments served at 11:15 a.m.
*C. Daniel Frisbie*
Department of Chemical Engineering & Materials Science, University of
Minnesota, USA
*/New Materials and Printing Processes for Flexible Electronics/*
Abstract
Currently there is great interest in developing manufacturing methods
for integrating electronic circuitry into flexible and stretchable
substrates for a spectrum of applications including roll-up displays,
wearable biosensors, smart labels, and electronic skins ('e-skins') for
robotics, for example. One fabrication strategy that has captured
imaginations involves the use of digital or analog printing techniques
to pattern electronically functional inks onto paper, plastic, rubber,
or metal foils. However, "printed electronics" has a number of
significant challenges, including spatial resolution, pattern
registration, and printed circuit performance. In this talk, I will
describe a multi-pronged approach to address these challenges that may
bring roll-to-roll printed electronics closer to reality. To begin, I
will show that innovations in materials allow the fabrication of
printable, low voltage thin film transistors (TFTs), the key building
blocks of flexible circuits, and that these can be incorporated into
simple printed circuit demonstrations involving two dozen TFTs and an
equivalent number of printed resistors and capacitors. The second half
of the talk will describe a novel liquid-based fabrication approach that
we term SCALE, or Self-Aligned Capillarity-Assisted Lithography for
Electronics. The SCALE process employs a combination of digital printing
and in-substrate capillary flow to produce self-aligned devices with
feature sizes that are currently as small as 1 ?m. The talk will finish
with a discussion of the new opportunities in flexible microelectronics
afforded by liquid-based processing.
Bio
C. Daniel Frisbie is Distinguished McKnight University Professor and
Head of Chemical Engineering and Materials Science at the University of
Minnesota. He obtained a PhD in physical chemistry at MIT in 1993 and
was an NSF Postdoctoral Fellow at Harvard. His research focuses on
materials for printed electronics, including organic semiconductors and
their applications in devices such as transistors and solar cells.
Research themes include the synthesis of novel organic semiconductors,
structure-property relationships, organic device physics, and the
application of scanning probe techniques. Recent efforts also include
new manufacturing approaches to flexible electronics and the use of gel
electrolytes as high capacitance gate insulators in OTFTs to lower drive
voltages. From 2002-2014, Frisbie led a multi-investigator effort in
Organic Optoelectronics at the University of Minnesota, sponsored by the
Materials Research Science and Engineering Center (MRSEC) program of the
NSF. He is currently the lead investigator on a Multi-University
Research Initiative (MURI) grant funded by the Office of Naval Research
for development of a roll-to-roll printed electronics manufacturing
platform.
For further information please contact Prof. Richard Lunt, Department of
Chemical Engineering and Materials Science at [log in to unmask]
Persons with disabilities have the right to request and receive
reasonable accommodation. Please call the Department of Chemical
Engineering and Materials Science at 355-5135 at least one day prior to
the seminar; requests received after this date will be met when possible.
