Plastic substrates for active matrix liquid crystal display incapable of withstanding processing temperature of over 200.degree. C and method of fabrication

Patent · Fri Jan 01 00:00:00 EST 1999

OSTI ID:872082

Carey, Paul G ^[1]; Smith, Patrick M ^[2]; Havens, John ^[3]; Jones, Phil ^[4]

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1. Mountain View, CA
2. San Ramon, CA
3. San Diego, CA
4. Marlborough, GB

Bright-polarizer-free, active-matrix liquid crystal displays (AMLCDs) are formed on plastic substrates. The primary components of the display are a pixel circuit fabricated on one plastic substrate, an intervening liquid-crystal material, and a counter electrode on a second plastic substrate. The-pixel circuit contains one or more thin-film transistors (TFTs) and either a transparent or reflective pixel electrode manufactured at sufficiently low temperatures to avoid damage to the plastic substrate. Fabrication of the TFTs can be carried out at temperatures less than 100.degree. C. The liquid crystal material is a commercially made nematic curvilinear aligned phase (NCAP) film. The counter electrode is comprised of a plastic substrate coated with a transparent conductor, such as indium-doped tin oxide (ITO). By coupling the active matrix with NCAP, a high-information content can be provided in a bright, fully plastic package. Applications include any low cost portable electronics containing flat displays where ruggedization of the display is desired.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: Regents of University of California (Oakland, CA)
• Patent Number(s): US 5856858
• OSTI ID: 872082
• Country of Publication: United States
• Language: English

Related Subjects

plastic
substrates
active
matrix
liquid
crystal
display
incapable
withstanding
processing
temperature
200
degree
method
fabrication
bright-polarizer-free
active-matrix
displays
amlcds
formed
primary
components
pixel
circuit
fabricated
substrate
intervening
liquid-crystal
material
counter
electrode
the-pixel
contains
thin-film
transistors
tfts
transparent
reflective
manufactured
sufficiently
temperatures
avoid
damage
carried
100
commercially
nematic
curvilinear
aligned
phase
ncap
film
comprised
coated
conductor
indium-doped
oxide
ito
coupling
high-information
content
provided
bright
package
applications
cost
portable
electronics
containing
flat
ruggedization
desired
plastic substrate
avoid damage
active matrix
film transistors
crystal material
counter electrode
liquid crystal
substrate coated
plastic substrates
primary component
crystal display
processing temperature
thin-film transistors
transparent conductor
film transistor
active-matrix liquid
/349/