Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Copy of BIONIC SKIN

No description
by

Shradha Gupta

on 9 February 2014

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Copy of BIONIC SKIN

BIONIC SKIN
WHAT IS BIONIC SKIN

Flexible electronic mesh ,embedded with temperature and pressure sensors, that could be worn by a robot or can be applied on human skin

THIN FILM TRANSISTORS (TFT)
CONNECTION CONSTRAINTS
There are more than 2 million connections required in a meter of the plastic sheet,it is not possible to wire 2 million sensors directly to the driver circuits that control them
Active matrix is a type of addressing scheme,In this method of switching individual elements are attached to a transistor and capacitor which actively maintain the pixel state while other pixels are being addressed instead of passive.


TYPES OF SENSORS USED
Tactile or touch sensors
Thermal or heat sensors
Pressure sensors
It consist of plastic film base , and match normal human skins amazing fexibility.
Bionic or E-skin basically consist of tactile sensors along with transistors with conducting interconnects.
TECHNOLOGY USED

Today’s rigid electronics aren’t a good fit with soft human bodies as thin material that can flex and even stretch without destroying its conductive properties IS required.
Thin-film transistors are used as these TFTs can be made of various kinds of semiconductor materials that can be deposited in thin layers And there is a range of materials that can serve as flexible substrates eg plastic films here.

An ultrathin polymer/plastic sheet that measured 1 micrometer thick—one-tenth the thickness of plastic wrap was used as a base for fabricating TFT's and sensors,as this material can withstand stretching of up to 230 percent.
Active matrix technology is used to make interconnects between large number of components.
Highly sensitive heat and tactile senors to match ,normal skins responsiveness.
A thin-film transistor (TFT) is a special kind of field-effect transistor made by depositing thin films of an active semiconductor layer as well as the dielectric layer and metallic contacts over a supporting (but non-conducting) substrate.
Due to its small size , it requires very minimal power to operate,hence they can be used in large numbers together.
Moreover , for flexible substrate , special type of TFT call ORGANIC TFT is used which has organic semiconducting compounds , as POLYMER in bionic skin.
ORGANIC THIN FILM TRANSISTORS
An organic field-effect transistor (OFET) is a field-effect transistor using an organic semiconductor in its channel.
These devices have been developed to realize low-cost, large-area electronic products and biodegradable electronics. OFETs have been fabricated with various device geometries
Sensors play a key role as they have to be as responsive as the human skin

For this purpose special sensors are made using the thin film layering process similar to TFT's having greater amount of senstivity.
FABRICATION ON
PLASTIC BASE

The fabrication process of TFT and other components is achieved mostly by using inkjet technology ,used in inkjet printers.

Inkjet technology can deliver the exact amount of any substance you want applied to precisely targeted positions, which reduces the waste of raw material.
Printing processes can simultaneously apply the coating and the circuitry pattern of thin-film materials, which are usually performed as separate steps when semiconductors are manufactured via lithography
The conducting material to be used should also be flexible enough so that connections do not break
Solution=ACTIVE MATRIX TECHNOLOGY
Solution=CARBON NANOTUBES
ACTIVE MATRIX TECHNOLOGY
Column and row numbers are used to specify the sensors address reduces the number of connections necessary
CARBON NANO TUBES
Carbon nanotubes (CNTs) are allotropes of carbon with a cylindrical nanostructure.
Due to their cylindrical organisation of carbon molecules , it acts a good conductor and is quite flexible too.

In manufacture of e-skins the conductor was made out of rubber with carbon nano tubes distributed throughout the material in tangled networks. When the rubber is stretched, those conductive nano tube networks change their shape but do not break
Application in robots
Bionic or e-skin can be used to build more sophesticated and intelligent robots which have responsiveness equivalent to humans.
The bionic skin is wrapped around parts of the robot and helping build more flexible parts.
Complex human features such as touch, ability to feel breeze and reflex actions on basis of stimuli can be integrated.
Application in Biomedics
E-SKIN can be applied on prosthetic parts giving giving them real part like responses and touch
Bionic skin has the critical ability to sense many variables at once,hence used for pulse and blood pressure measurement.
Linking sensors with radio-frequency communication modules within an e-skin would also allow the wireless transmission of information from skin to computer
For this organic transistor-based amplifiers are distributed throughout the film. This allowed us to detect signals very close to the source, which is key to improving the signal-to-noise ratio, and thus the accuracy of the measurements
In the further steps ,the fabrication of these circuits has been started directly on to the skin in the same fashion as a temporary tattoo. ,called electrical epidermis,which contained the antenna and ancillary components needed for radio-frequency communication. Doctors could use these tiny devices to monitor a patient’s vital signs without the need for wires
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
The conducting material to be used should also be flexible enough so that connections do not break
Full transcript