1. POWER SYSTEMS ANALYSIS
EEE4103
Course instructor: FAIZ, RETHWAN
Room – 245
Summer 2013
Presentation on:
Quantum Tunneling Composite

2.  Ahsan, Md. Ashraf Ul
 Sabrina, Faria
 Mahmud, Hasan
 Chowdhury, Mukit Ahmed

3.  What is QTC
 QTC in brief
 Simple QTC implementations
 Advantages of using QTC
 Future prospects

4. QTC (Quantum tunneling composite) is a flexible
polymer that exhibits extraordinary electrical
properties. In its normal state it is a perfect insulator,
but when compressed it becomes a more or less
perfect conductor and able to pass very high
currents.
Electron microscope image of QTC
What is QTC??

6.  Quantum Tunneling Composite is a new class
of electrically conductive material
 QTC Material is a patented technology
developed in the UK by Peratech Limited
based on original discoveries by David and
Chris Lussey, the company's founders.
 First produced in 1996.
 While in an unstressed state the QTC Material
is a near-perfect insulator; with any form of
deformation the material starts to conduct
 QTC usually comes in the form of pills or sheet

7.  QTC pills are magnetic too. Nothing like having
some magnets laying around on the table while you
work.
 The sheets are composed of one layer of QTC, one
layer of a conductive material, and a third layer of a
plastic insulator.
 While QTC sheets switch quickly between high and
low resistances, QTC pills are pressure sensitive
variable resistors.

8. Simple QTC
Implementations

10. QTC Sheet Two probes pressed on the sheet

13. ADVANTAGES Of QTC

14.  QTC material is a pressure/force sensing material.
 Can be formed or molded into virtually any size,
thickness or shape.
 Simple and reliable to use.
 Durable - it has no moving parts to wear out.
 Mechanically strong.
 Can be made to withstand extreme temperatures
limits.

15.  Versatile, both electrically and physically
e.g. Its range and sensitivity can be
altered.
 Intrinsically safe - the material is a
contactless switch, ideal for spark free
operation.
 Can be directly interfaced to standard
electronic and electrical devices
 Can be customized for customer
requirements, applications and products.

16. Future Prospects

17.  Mobile Applications
 Touch screen LCD’s
 Embedded fabric controls used in
automobiles
 Smart-Tex
 Medical equipments
 Speed control in simple machines

18.  Touch sensor
 Scrolling
 Writing
 Drawing

20.  Cheap detector
 Easy X-Y position detection

21.  Operating mirrors, doors and windows
 Gesture, stroke, swipe and pressure sensing

23.  Easy control of devices
 Pressure controlled conductive surface
 Switching
 Can be used to implement circuitries on it

30. Thank you
