Flexible Printed Electronics Suncheon
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Transcript of Flexible Printed Electronics Suncheon
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680 m
Flexible and Printed Electronics forFlexible and Printed Electronics for
Displays and Image SensorsDisplays and Image Sensors
Jurgen Daniel (danielparc!com"#!$! #rias% &! &ong% S!E! 'eady% ! )g% *! +rusor% '!,u-an% '!#! #pte% J!P! ,u% .!,! $/abinyc% '!#! Street
Palo #lto 'esearc/ $enterPalo #lto% $#
The Future Prospects and Obstacles of Organic ElectronicsSuncheon, Feb 25, 2008
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utlineutline
A few words about PARC
Motivation for flexible and printed electronics
Required components for printed electronics
Printer Materials
TFT performance
Display and sensor applications
ome of t!e c!allen"es for printed pixel circuits
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P#'$ 1er1ie2P#'$ 1er1ie2
Electronic .aterials and De1ices
3ard2are and Systems
$omputer Sciences
Intelligent Systems
Palo #lto 'esearc/ $enter4 incorporated in 5005 (formerly erox P#'$"
#$%& researc!ers in multiple disciplines
7 labs
www.parc.com
Large Area Electronics, MEMS,
Optoelectronics, Printing Concepts/Systems,
Piezo Materials, Biomedical Systems,
Clean Technology, ...
'esearc/ 2it/ client companiesPartners/ips 2it/ ne2 1entures (startup P#'$")e2 business creation,icensing and tec/nology transfer
'esearc/ as a business
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,arge9#rea Electronics at P#'$,arge9#rea Electronics at P#'$
,o2 temperature a9Si on plastic
!ray imagers
,PS ,ED bac:plane on steel
Jet9printed digital lit/ograp/y of a9Si Fs
displays
ec/nologies
Amorp!ous silicon 'a(i)
*ow(temperature amorp!ous i
*ow(temperature poly i '*TP)
+r"anic semiconductor processes
,et(printed electronics
PA"C "#$ ser%ices&
Prototyping and System designesting and $/aracteri;ation
(W. Wong, et al.)
(J.P. Lu, et al.)
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,arge9#rea Electronics at P#'$,arge9#rea Electronics at P#'$
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Flexible Electronics #pplicationsFlexible Electronics #pplications
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.oti1ation for Printed Electronics.oti1ation for Printed Electronics
Printing can be a fast andinexpensi1e process 'e-"- newspaper)
T!erefore. printin" processes may also enableinexpensi1eelectronics for ne2 applications'RF/D ta"s. e(paper. disposableelectronics. ---)
Printin" often simplifies conventional processes
Solna &eb Presses
'in()et, pad printing, screen, gra%*re, +leo, o++set, ...-
Printable electronics mar:et5 bn (50>>"
?" @()anomar:ets!net"
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Printed Electronics #pplicationsPrinted Electronics #pplications
Duracell *attery tester
$ypa: IntelligentP/armaceuticalPac:aging
PolyI$ 'FID
$SA 1ia etc/ing
Plastic ,ogic e9paper
$D ,ED displays
+onar:a Solar cellPeli:on E, displays
ome examples
Po2er Paper battery
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Jet9printingJet9printing
9y translation stages for positioning$01 printin" capability
Pie;o print/eads (single or multi e-ector"
2erox print!ead 'stainless steel)#$3&& e4ectors 5 3&678
Potential linear print speed #m9sec
:9( 0 m print accuracy
mall drop si8e '#3&(;& m)
usin" also pectra '#$3< e4ectors) and MicroFab'sin"le e4ector) print !eads
$omputer 1ision system and soft2are foralignment and layer9to9layer registration
0950 p,
remark
!ith electrostatic "et#printing $%m lines achie&ed, but onl' !ith single e"ector ()* +urata, -+E.S/0%
PA"C et!printing system
camera
print/ead
controlsoft2are
substrate/oldertranslation
stage
Piezo in(!)etting&
#d1antages (1s! offset% gra1ure% flexograp/y"! %ariale pattern
! on!the!+ly error correction! non!contact
! 0ide range o+ materials 1incl. hot!melt2
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.aterials (In:s" for Printing.aterials (In:s" for Printing
'/T+ nanoparticles. b+. =n/n+.--- )
Polymers'e-"- lens. >D ob4ects. dielectric. colour filters.
polyimide ali"nment layers)
P!osp!ors
?iocoatin"s
@tc!ants
ilver. "old. nic6el. solder
Ma"netic nanoparticles
uantum dots
Metal !alide precursors 'e-"- nCl)
Transparent a(oxide semiconductors
@lectroluminescent materials
CBTs. nanowires
Microemulsions
*iquid crystals
pacer beads 'e-"- for *CD)
C!emicals 'e-"- explosives. narcotics for standards)
?ioc!emicals'e-"- for protein arrays)
Conductive9semiconductive polymers
Banoparticles
Ad!esion promoter
ax 9 'p!oto)resist
---
1iscosity range 970 cp
surface tension
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Digital ,it/ograp/yDigital ,it/ograp/y
simplifies lit/ograp/y
printed organic semiconductor(and PCP..# blends"-et9printed 2ax
mas:ing layer
con%entional deposition&
!sp*tterning
!PEC4$
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#ll9additi1e Printed rganic Electronics#ll9additi1e Printed rganic Electronics
s%d%g 9 contactsP@D+TPpolyanilineA"9Cu(epoxy in6snano("old
)ano9sil1er
CBTs
Thin 3ilm Transistor1T3T2
'bottom("ate)semiconductor'polymers. oli"omers. precursors. nanoparticles)
polyfluorenesporp!yrinsT/P pentacene
polyt!iop!enes (P>7T.P>5% P?TTT"CBT. nanowires. nanosilicon----
e-"-
e-"-
substrate
polyesterpolyimidePE)'polyet!ylene nap!t!alate) ---
e-"-
g
ds
inter9layer dielectrics
PMMA?C? 'ben8ocyclobutane)polyimidepin(on("lass
PP'polyvinylp!enol)epoxy 'SG98)---
e-"-
(gate dielectric% top dielectric"
many ne0 materials are introd*ced into the process
!5 per+ormance o+ the materials has to e optimized andprocess compatiility ens*red
'eHuires solution9processable materials
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/e Importance of t/e Aate Dielectric/e Importance of t/e Aate Dielectric
too hydrophobic
too hydrophilic
e.g. compatiility 0ith )et!printing&
Composites 1TiO6, BaTiO7, 8rO62
Polymer 9 sil%er nanoparticles
Cyano!ased resinsElectrolytes
Polyimide
possile gate dielectrics
SA:$S
BCB
P4A
P4PS;!
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Jet9printable rganic SemiconductorJet9printable rganic Semiconductor
/ydrop/obic self9assembled monolayersgenerally impro1e field effect mobility
c/emistry of gate dielectrics
impacts F performanceK
octadecyltric/lorosilane (S"
lamellar ordering
ng% et al!% J#$S% >56 (5007" ??B8
polyt/iop/ene P9>5
potential problems9 crystallinity of film is affected by surface9 interface traps in dielectric9 dipolar disorder due to Si93 groups
/Dtransp
ort
Si5 LstandardL dielectric
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#ll9additi1e Pixel9F#ll9additi1e Pixel9F P(based TFT wit! PP"ate dielectric and printed nanosil1er99D on PE)
,
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Jet9Printed #cti1e9.atrix *ac:planesJet9Printed #cti1e9.atrix *ac:planes
'a) 'b)
'c)
680 m
680 m
'a) 'b)
'c)
680 m
680 m
M0xM0 pixel array
glass substrate
680 m pixelsmetal printed 2it/ multi9no;;le print/eadspin9coated dielectric
gate9layer
data9layer
pixel design
printed pixels (P9F"
piel pad
T3T
data!line
gate!line
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Flexible Printed *ac:planesFlexible Printed *ac:planes
on flexible PE) polymer substrate (DuPont"
PE: s*strateP4P gate dielectricPrinted AgP>T semicond*ctor
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Pixel PerformancePixel Performance
?All!additi%e printed piels on PE: s*strate?
c!ar"in"9disc!ar"in" times #&-0ms
low "ate(feedt!rou"! 'E%G of "ate(swin")
sufficient c!ar"e stora"e
Pixel performance is sufficient to dri1e
electrop/oretic media
Picoprobe measurements
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esting of Display *ac:planesesting of Display *ac:planes
poor contact
scratc/ed data liness/orted data lines
line defect
P#'$ test electronics
array
c/arge amplifiers
Lc/arge mappingLenables 1isuali;ation of defects and of array uniformity
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#pplications for Flexible and#pplications for Flexible and
Printed Pixel $ircuitsPrinted Pixel $ircuits
Displays
Sensors
'ima"e sensors. bio(sensors. M@M sensors. ---)
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Electrop/oretic DisplaysElectrop/oretic Displays
con1entional #. bac:plane 2it/P semiconductor
fixed electrode patternflexible substrates
con1entional #. bac:plane 2it/amorp/ous Si semiconductor
1ispla' media E!in(electrophoretic imaging film
acti%e!matri acti%e!matri
segmented
(5M0 ppi"(BM ppi"
"&%e&ew
electrophoretic media
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Flex Displays 2it/ ,o29 a9SiFlex Displays 2it/ ,o29 a9Si
6K flexible display(E9in: media"
istale image a+ter @ month
6K digital lit/ograp/y array
8K p/otolit/ograp/y array on PE)
'printed mas6 layers)
TFT
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#ll9additi1e *ac:plane 2it/#ll9additi1e *ac:plane 2it/
Electrop/oretic .ediaElectrop/oretic .edia
4et(printed silver 99D and PT semiconductor polymer "ate dielectric
charge map&
bac:plane is capable of 2riting imagesimage is consistent 2it/ c/arge map
M0xM0 pixel array
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Sensor #pplicationsSensor #pplications
2(ray ima"e2(ray ima"e
?9C li"!t ima"e?9C li"!t ima"e
$
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,PS on Flexible Stainless Steel,PS on Flexible Stainless Steel,PS ,aser recrystalli;ed a9Si
PM+ mobilities up to MN cm5Cs
A# full color ,ED display demonstrated (collaboration 2it/ GD$ and ,?"
F performance similar to Fs on glass
;$C?s
phosphorescent
OLE$
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)e2 3emisp/erical #rrays)e2 3emisp/erical #rrays
Aeodesic dome
@ye(li6e ima"ersp!erical displays
-- on". T-B- B". R- A- *u4an. - ambandan. ?- Hrusor. R-A- treet
Applications
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$/allenges for Printed *ac:planes$/allenges for Printed *ac:planes
3ig/er display resolution De1ice stability'environmental. It s!ift)
$ircuit speed'e-"- for full video or for printed driver circuitry)
Cost of driver electronics and battery. versus
printed bac6plane'transferred /Cs. printed batteries J)
Printin" yield
,arge9scale manufacturing ('oll9to 'oll"
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Impro1ed Printing ProcessImpro1ed Printing Process Printing of narro2 lines Printing of narro2 spaces
>0 m
s/ort F c/annel lengt/increased pixel aperture ratio
minimum 1alue is determined
by drop placement accuracy
M? m
printed nano!sil%er
decreasing surface energy
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.ulti9layer Pixel ia Formation.ulti9layer Pixel ia Formation1ia formation by -et9printing a mas:
process steps
sil%er mas(
%ia interconnect %ia an( str*ct*re
%ia
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.ulti9layer Pixel 2it/ .olded Dielectric.ulti9layer Pixel 2it/ .olded Dielectric(for /ig/er resolution"(for /ig/er resolution"
side view
top view
.ulti9layer pixel
printed 2ax pillar
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*ias Stress Effects in PP9based Fs*ias Stress Effects in PP9based FsP4P/PSS>
Si59li:e alleo. et al-. Appl- P!ys- *ett-.
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*ias Stress in #ll9additi1e Fs*ias Stress in #ll9additi1e Fs
PQT semiconductor
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Speed of Display 4 1ideo rate @Speed of Display 4 1ideo rate @
>N0x67 m%
$st
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'oll9to9'oll Processing'oll9to9'oll Processing
.e:oprint Electronics
+onar:a
PolyI$
$IC ennia
ould be most adequate met!od forprintin" processes
/s used already for some or"anic
electronics applications
till requires materials improvement fors!ort processin" times
*ayer to layer re"istration is c!allen"in"
/s it t!e best met!od for display
bac6planes J
Prof A! $/o(Sunc/on )ational Gni1!"
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Summary and utloo:Summary and utloo:
PARC !as a wide portfolio of flexible bac:planetec/nologies
All(additive printed electronics promises ultimate costsa1ings
.any ne2 materialsare introduced in t!e process (performance9lifetime of t!e materials !as to be
investi"ated
,o2 resolution pixel circuitse-"- for si"na"e(typeapplications
3ig/er resolution(L multilayer pixel desi"n or narrowerprinted lines
Prototype electrop/oretic displays!ave been fabricated
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#c:no2ledgment#c:no2ledgment
PA"C processin" line under,ac6son 7o
ero "esearch Centre o+ Canada Pin" *iu. ilian" u
:DST partial fundin"
Dupont ei-in P@B substrates
E9In:collaboration on electrop!oretic media