4. WHAT IS POLYTRONICS…??
Polymer + electronics
Influence of plastic in electronics
Certain plastic(polymers) have conductive & light
emitting property
providing the basis of a new technology for flat–panel
displays with excellent visibility
5. PLASTIC ELECTRONICS
Plastics could be made to conduct through doping(adding
impurities)
depending on their chemical structure plastics may exhibit
electrically conductive, semi-conductive or insulating properties
Chemical composition of plastics or conjugated polymers is
changed by doping to make them conducting
Polymers such as polythiophenes, oligothiophenes and
pentacene have conductive property
electronic behavior of these polymers is very different from
inorganic semiconductors such as silicon or gallium arsenide
7. CONJUGATED POLYMERS
Gain conductivity
through “conjugation”
Polymer molecules have
alternating double bond
and single bond
Pathway for free
electron charge carriers
Doped with oxidising or
reducing agents
Conductivity btw conv:
polymers & metals
8. MOSTLY USED CONJUGATED POLYMERS
They can emit light
Conductivity can be varied
Generate current
Ability to store an electric
charge
9. MANUFACTURING TECHNIQUES
Printing polymer circuits is known as Polymer
Mechatronics or Flexonics
Developed by university of California in Berkeley
No need of “assemble and build” technique
10. PRINTING YOUR CIRCUITS
Polymer
mechatronics or
flexonics
The entire product
would come out of the
printer
Electronic circuits
embedded in the
product itself
13. ELECTRONIC PAPER
paper is made of a thin layer
(coating) of conductive synthetic
material
coating contains capsules filled
with oil, with floating black and
white pigment parts in it.
text and pictures are displayed by
electronic ink or e-Ink.
use plastic substrate and
electronics to make the display
flexible.
text or the image will remain on the
electronic paper, even when the
reader is switched off
14. USED IN : Electronic price tags, Bus/Train station timetables,
Electronic billboards…
ADVANTAGE : handy, light size ,Inexpensive ,reusable ,portable…
electronic ink
electronics required to
generate the pattern of
text and images
Electronic paper
Front plane
backplane
15. PLASTIC BATTERIES
Developed by Hopkins university
Positive and negative electrodes are
thin, foil-like plastic sheets
Electrolyte is a polymer gel film
Does not contain hazardous chemicals
as in Ni-Cd cells
Can be recharged and reused a
number of times without loss of power
USED IN :military and space applications , small consumer devices
16. ELECTROACTIVE POLYMERS
Polymers which can be to bend,
stretch, twist or contract under
the influence of electric charge
Have the potential to function as
artificial muscles
Implanted into the body
Have sensor, battery &EAP
valves
Sensor activated with chemical
change
delivered to specific tissues at
specific doses and times.
Artificial muscles Smart pills
17. OLEDS
sandwiching organic thin films
between two conductors.
Emissive displays
Wider viewing angle(upto 160°)
Can be read even in bright
sunlight
Preferred choice for lighter, thinner
and flexible display screens
USED IN : televisions, laptop, cellular phones, digital video cameras,
DVD players, PDAs, car stereos
19. ADVANTAGES
freedom in design
cheap foil substrates
light-weight
compact portable products
cost-effective assembly with reel-to-reel processing
environment-friendly
printing instead of lithography
Scale :printing can be done with almost unlimited length
20. DISADVANTAGES
Need low temperature processes
Substrates are not flat and have many defects
Plastics are highly permeable for water and oxygen and
offer little protection for electronic components
21. FUTURE
Rollable or foldable thin film
computers
Electronic newspaper which
continually updated
Fruit and vegetables labels
Invisible chips will one day be
integrated in paper, postage
stamps, bank notes etc with
intelligence
22. CONCLUSION
provide a cheap method for the fabrication of simple low-cost electronic products
Polymer materials offer a high degree of freedom and flexibility in the design of the
materials, devices and systems
Scarcity of semiconductors and power compels the new generation to move to
polytronics.
“THE IDEA OF POLYTRONICS IS NOT TO REPLACE SILICON TECHNOLOGY BUT TO DEVELOP
NEW APPLICATION IN CONJUNCTION WITH SILICON”