Flexible Electronics

Presented By:

Roshan Mani

11ECTEC047

B.Tech. VIII Sem

E.C.E. Deptt.

GCET Bikaner

7-May-15 1Roshan Mani

OUTLINE

Introduction

Basic OLED Structure

Materials for flexible electronics

Technologies involved in processing

Technologies for Flexible Displays

Degree of flexibility

Applications

Advantages and Limitations

Conclusion


INTRODUCTION

Ever evolving advances in thin-filmmaterials and devices have fueled many ofthe developments in the field of flexibleelectronics.


Basic OLED structure


Materials for Flexible Electronics

A generic large-area electronic structure is composed of :

Substrate

Back-plane

Front-plane

Encapsulation


SubstratesFlexible substrates that are to serve as drop-in replacements for plate glass substrates must meet many requirements:

Optical properties

Surface roughness

Thermal and thermo-mechanical properties

Chemical properties

Mechanical properties

Electrical and magnetic properties


Backplane electronicsBackplanes provide or collect power and signal to or from front-planes. Backplanes may be passive or active.

Silicon Thin-Film Transistors

Organic Thin-Film Transistors

Materials for Interconnects and Contacts


Backplane Electronics


Front plane technologiesFront plane carry the specific optoelectronic application.

Liquid Crystal Displays

Electro-phoretic Displays

Organic Light-Emitting Displays

Sensors


TECHNOLOGIES AND INTEGRATION PROCESSES

Any manufacturable device has four essential characteristics:

Superior and pre-specified performance, with reproducibility, uniformity, and reliability

High yield to acceptable tolerance

Simulations exist for both reverse engineering during development and right-first-time design

Proven adequate in-service lifetime.



FABRICATION TECHNOLOGY FOR FLEXIBLE ELECTRONICS

Fabrication on sheets by Batch Processing..

On a rigid carrier, facing up and loose;

In a tensioning frame, facing up or down;

In a frame, facing down and loose

Fabrication On Web by roll-to-roll Processing

Additive Printing


Batch and roll to roll fabrication



Degree of flexibilityFlexibility can mean many different properties to

manufacturers and users.

Degree of flexibility is given by ε = d/2r.

Bendable or rollable

Permanently shaped

Elastically stretchable


Examples…


APPLICATIONS

Holistic system design


Health Care


Other applications

Automotive Industries

Displays and Human- machine interaction

Energy management and mobile devices

Wireless systems

Electronics Embedded in the living environment

Electronics for hostile environment etc..,



ADVANTAGES AND LIMITATIONSAdvantages: Size and weight Self luminous Low cost & easy fabrication Increased circuitry density Bounadaries of design and packaging Shape or to flex during its use Wide Viewing Angle

Limitations:

Lifetime Manufacturing Water Battery


CONCLUSION

Based on the current socio-economic trends, weoutlined some of the most likely technological futureneeds and discussed the potential exploits of thin-filmflexible electronics in various market sectors.



Engineering

Flexible Electronics