OLED薄膜封装技术资料

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ITO Anode
TPD Alq
5.0
+ 5.53;
Mg:Ag
+
/
7
Process Flow
Equip. configuration
Clean & bake
(1) TFT Loading
(2) Pre-treatment
(3) CVD (CFx Dep.)
(4) HIL/HTL Dep.
14
Sealing Components & Process Parameter
Substrate Cap glass (sand blasting) Desiccant UV lamp (glue) Vacuum or N2 atmosphere
ITO

HTL
UV glue curing
Adv. Funct. Mater. 2001, 11, No. 2, April, p116
21
Purposes of Sealing
Luminescence deterioration
p.2195
22
p.2195
23
Comparisons
Methods H2O/O2 resistance OLED life time Weight & thickness Flexible Mass production Cost
18
Purposes of Sealing
Permeability
19
Mechanism and Phenomenon of Deterioration
Schematic diagram of H2O/O2 penetration path
20
Purposes of Sealing
Non-emitting area (black spot) caused by H2O/O2
OLED Encapsulation
FPD Email: tzenck@
Ext: 5812
Contents
9 Introductions- OLED Structure & Process Flow 9 OLED Encapsulation Process 9 CPT Current Studies on Advanced Encapsulation
, Cathode , ETL
, EML , HTL , HIL
ITO, Anode
-
~2000A
+
4
PM & AMOLED
Cs
T1
Data line
Gate line
T2
5
PM & AMOLED
Comparison
6
How OLED Emits the Light ?

-
2.4
-
3.1
3.7
37
Vitex
38
Some Demo Studies
CPT Current Studies on Advanced Encapsulation
Single layer
- SiOxNy - SiOx - Parylene
• Structure of test substrate
Multi-layer
- SiOxNy/SiOx/Subs - SiOxNy/SiOx/Parylene/Subs - SiOx/SiOxNy/Parylene/Subs
• Proposed OLED passivation layer
40
CPT Current Studies on Advanced Encapsulation
(5) EML R Dep.
(6) EML G Dep.
Cap Glass Loading (7) EML B Dep.
(1) Glue Dispensing (8) EIL/ETL Dep.
(2) Dessicant Att.
(9) Metal Dep.
(10) (3) Encapsulation
Encap glass X
Thin film
24
Desiccants and Makers
- Powder: CaO, BaO, SrO - Liquid:
transparent, Futaba non-transparent, Kodak etc - Tape: Dynic (Japan), Gore-Tex (Japan), Saes Getters (Italy), RND’s (Korea) -
10
11
OLED Encapsulation Process
Purposes of Encapsulation
A key process in the whole OLED manufacturing 9 H2O/O2 enhances device deterioration 9 Chemical reaction between metal cathode and organics 9 A non-emitting black spot is formed ¾ Life time and luminescence decrease!
(11) (4) Unloading
8
Evaporation Chamber
9
Evaporization
HIL/HTL Deposition Emitting Layer Deposition
Emitting Layer Deposition Emitting Layer Deposition ETL/Metal Deposition
Surface roughness
- Si base inorganic expresses smoother than Parylene - Thickness in this test, Si base inorganic can’t planarize Parylene
Transmittance (at 550nm)
- SiOxNy >85% - SiOx is expected >95% - Parylene >90% (w/o interference)
44
Patent & Paper
OLED OLED OLED TDC 2004- Preliminary Results of Barrier Layers for OLED IDW 2004- Manufacture of Encapsulation Layers for OLED in
AFM: Roughness measurement
42
CPT Current Studies on Advanced Encapsulation
Spectrometer: Transmittance measurement
43
CPT Current Studies on Advanced Encapsulation
TR3
Cookson Parylene (C, Cl polymer)
Robot hand mask carrier for ITO for ITO
Plasma coating system, SHI
carrier for SiON
mask for SiON
ITO source
SiO source
ITO/SiO source can be changed automatically.
UV glue
EML
Desiccant
ETL
LiF/Al
Glue Cap Dryer
15
Cap Glass & OLED Device Substrate
16
Desiccants and makers
Gore-Tex, Japan
17
Purposes of Sealing
Permeability
1
IntroductionsOLED Structure & Process Flow
Why OLED?

(
, >105 nits)

(>160o)

~1.75mm (
)



(few mS)(LCD ~20-30ms)

(–20~70 )

3
OLED Basic Structure
5 - 10V
Vitex (Battelle), US006268695 , US006497598, etc.
• Foundation and top structure composed of ceramic and polymer
• Ceramics : In2O3, SnO3, ITO, Al2O3,TiO2, AlN, SiN, SiC, SiON, SiO2 by vacuum, sputtering, plasma deposition
FIB: Cross section images
Parylene
Parylene
2.0 um Separator
Si based inorganic
100nm (81.6nm) insulator ITO
Composite Si based inorganic
PDL1
41
CPT Current Studies on Advanced Encapsulation
Vitex’s BarixTM
34
CPT Current Studies on Advanced Encapsulation