Printed Polymer Transistor Arrays for Displays and Imaging, Kateri E. Paul



Dinner Lecture
Wednesday, May 14
Faz Restaurant, Sunnyvale

"Printed Polymer Transistor Arrays
for Displays and Imaging"

Kateri E. Paul
Electronic Materials Lab
Palo Alto Research Center (PARC)


Organic semiconductors are an attractive transistor technology for inexpensive displays and image sensors. Polymers offer low temperature solution processing on flexible substrates at low cost. Direct writing of active materials minimizes both the number of processing steps and the use of materials, and therefore also the cost of device fabrication. Direct writing of mask material for feature definition is also a simple and inexpensive patterning process. We have developed a process to fabricate arrays of organic transistors (OTFTs) using direct writing techniques to completely replace photolithography. In this multiple-mask process, metal for the source/drain contacts and the gate are patterned using jet-printed wax as a resist for wet etching, and the organic semiconducting polymer is deposited using inkjet printing or other fluidic deposition processes. Prototype active matrix TFT arrays are fabricated on a 300-micron pitch using a process with minimum feature size of 40 microns and alignment between layers of better than 5 microns. The talk will describe the processing approaches and compare alternative techniques to pattern the semiconductor. Characterization of our printed organic transistors shows field effect mobility and on/off ratios that compare favorably with OTFTs fabricated by spin-casting.

Speaker Background

Kateri Paul was born in Norwich, NY. She received her A.B. degree from Bryn Mawr College and PhD in Chemistry from Harvard University under the direction of Professor George M. Whitesides, where she studied soft lithographic techniques for
micro- and nanofabrication. She is currently a post-doctoral researcher in the Electronic Material Laboratory at the Palo Alto Research Center in Palo Alto, studying the printing of organic electronics.



DATE: Wednesday, May 14

Location: Faz Restaurant
1108 North Mathilda Ave., Sunnyvale
(click on the Sunnyvale branch)

Timing: 6 PM social hour
7 PM dinner
8 PM lecture

Cost: $30
half price students, retired, unemployed
free for just the lecture at 8PM
(but please let us know for headcount)

Deadline for registration:
5 PM Friday, May 9

Please register on the web site

Or, contact
Len Radzilowski

You should receive confirmation of your registration; if not, please contact us again.


Dinner choices:
Half Spit Roasted Chicken
Grilled Salmon
Vegetarian Ravioli

Note that we must request that you be liable for your registration fee if you register and do not attend; cancellation is allowed up to the registration deadline.


Faz Restaurant
1108 North Mathilda Ave, Sunnyvale
Restaurant's web page
click on the Sunnyvale branch
Restaurant phone: 408.752.8000
do not call restaurant for reservations

Map link

Restaurant is on N. Mathilda, east of 101 and 237,
just past Moffett Park Drive.



June 23, Mountain View
"Research, Industrial Affiliation, and Educational
Programs at the Center for Polymer Interfaces and Macromolecular Assemblies (CPIMA) an NSF Materials Research Science and Engineering Center"
Curt Frank, Stanford University, Director
Charles Wade, IBM Almaden Research Center, Co-Director


OTHER EVENTS of possible interest to the
GGPF audience:

APRIL 2003

April 21-25, San Francisco
Materials Research Society spring meeting

April 22, Newark
TA Instruments sponsored short course/training on
The Use of Thermal Analysis/Rheology for Material Characterization

April 22, Mountain View
nanoSIG: nanoElectronics & Photonics Forum event
with three speakers, including Steve Nett of
Quantum Polymer, and James Marek of California
Molecular Electronics Corporation

April 24, Menlo Park
nanoSIG: nanoMaterials & Manufacturing Forum Launch Meeting Afternoon meeting (1:30-6:30) with multiple speakers focusing on nanoparticles

April 25, Pleasanton
SPE Golden Gate Section annual TechFair
Seminars, Injection Molding Workshop, etc.

April 25, Mountain View
4PM afternoon meeting of the NCSS with
special SAS National Tour speaker:
Dr. Isao Noda of Proctor and Gamble
"2-D Spectroscopic Methods for the Study of Polymers"

April 28-30, San Francisco
ACS Rubber Division annual meeting

April 29, South San Francisco
AIChE NorCal Symposium (day-long seminar series)
"Emerging Trends in Biotechnology"

MAY 2003

May 6, Menlo Park
nanoBIO Forum meeting

May 14, Sunnyvale
IEEE CPMT dinner lecture
"Modeling and Characterization of Electronic Packaging Materials and Reliability of Products" by Prof. Sung Yi, Portland State University (Ed. note: abstract says the talk is about the "chemo-hygro-thermo-mechanical behaviors of electronic polymers"!)

May 15, Sunnyvale
One-day symposium
“MEMS and Advanced Packaging Technologies:
Synergies and Convergence”

May 20, Sunnyvale
ESDiscovery 2003
(Local ESD society-sponsored day of tutorials etc.)

May 21
AVS Thin Films User Group (TFUG) meeting
"Organic Polymer Devices and New Materials" click on TFUG

May 21, Sunnvyale
afternoon IEEE short course
"Overview of Electronic Interconnections" taught by
Joseph Fjelstad, a co-founder of Silicon Pipe.

May 22, Stanford (4:15)
"Photonic Interconnects: On-chip and Chip-to-System Photonics" a public lecture series. today's talk - "Photonics Packaging"

May 22, Palo Alto
nanoMaterials & Manufacturing Forum meeting

May 22, Santa Clara
ACS Silicon Valley dinner lecture
"Chemical Approaches to Studying Glycosylation"
Prof. Carolyn Bertozzi, U.C. Berkeley
For information, go to
and click on the April 2003 newsletter.

May 27, Mountain View
nanoElectronics & Photonics Forum meeting

JUNE 2003

June 10, San Jose
one-day training on "Analysis of Gauge Measurement Capability" with focus on the semiconductor industry / fab applications

June 15 - 17, San Jose
5th Annual BIOMEMS 2003 - Analytical Devices and Applications

June 29 - July 2, San Francisco
PREP-2003 -- 16th International Symposium, Exhibit and Workshops on Preparative/Process Chromatography, Ion Exchange, Adsorption/Desorption Processes & Related Separation Techniques

JULY 2003

July 13-16, San Jose
SmallTalk 2003
"The Microfluidics, Microarrays and BioMEMS Conference"
Includes several short courses on
microarrays, microfluidics, microfabrication and
simulations; see

July 14-16, San Francisco
July 16-18, San Jose
SEMICON West 2003
SF=wafer processing
SJ=final manufacturing
(note the "MEMS Pavillon" & conference)

July 15, San Jose
"Flipchip for Optoelectronics and MEMS"
one-day Short Course at SJSU
details to be posted at


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