replace silicon with nano technology

8/6/2019 Replace Silicon With Nano Technology

http://slidepdf.com/reader/full/replace-silicon-with-nano-technology 1/14

REPLACE SILICON WITH

NANOTECHNOLOGY

www.Fullinterview.com



ABSTRACTA completely new way of designing an

electronic interconnects for nano-scale circuits

using coding theory, by using cross-bar architecture

Nanotechnology in the crossbar latch could

unleash ³ new functions in a circuit ´ , at suchsizes ³ quantum mechanics takes over ´ and

³electrons behave more like waves than particles´.



IntroductionIntroductionA new way to design future nano-electronic

circuits using 'coding theory', an approach currently

being used in certain computer storage andtelecommunications applications. The result could be

nearly perfect manufacturing yields with equipment a

thousand times less expensive than what might be

required using future versions of current technologies.Believe future chips will have to rely, at least in part, on

the 'cross-bar architecture'.



Nanotechnology Nanotechnology comprises a wide variety of

disciplines: chemistry, physics, mechanical

engineering, materials science, molecular biology,and computer science.



CROSS BAR ARCHITECTURE



FABRICATION OF CROSS-BAR LATCH

Nanoscale molecular-

electronic devices

comprising a single

molecular monolayer of

bistable rotaxanes

sandwiched between two40-nm metal electrodes

were fabricated using

imprint lithography

An atomic force micrograph of a nanoscale

cross-point molecular device with an insertshowing the details of the cross point



FUNCTIONS OFCROSS-BAR LATCH

� One of the function is to perform logical operation

like ³AND´ , ³OR´ and ³NOT´ gates.

� The other function is to design a 64 bit

memory,using this cross-bar latch.



Performance of logic functions

Using electronic devices created by trapping

an electrically switchable layer only a few atoms

thick between crossed wires, a logic function can

be performed at each intersection of wires.

By applying a sequence of voltage impulses

to the control lines and using switches of opposite

polarities, the latch can perform the NOT function

essential for general computing operations.



DESIGN OF 64-BIT MEMORY

The 'highest density

electronically addressable 64-bit

memory' in a space one micron

square - an area so tiny that more

than 1,000 could fit across the

end of a single strand of humanhair can be seen in this series of

pictures, taken with optical and

scanning electron microscopes.

A close-up of a single 64-bit

memory. A bit can be stored

at each of the intersections of

the eight vertical and eight

horizontal wires



The crossed-wire structure of the

memory

The wafer on which 625 memories

are imprinted

Fabrication of cross-bar latch as a memory

device



Conclusion

Nanotechnology is a future technology,

which enables 'low-cost , high yield fabricationµ .

The crossbar latch design is "well-suited to

tolerate the inevitable defects that are bound to occur

in the fabrication process at such tiny dimensions" because it doesn't require the same level of precision

as silicon circuits.



References

[1] Kuekes, Philip J., Duncan R. Stewart and R.

Stanley Williams,´The crossbar latch´ Journal of Applied Physics 97, 034301 (2005).

[2] www.foresight.org.

replace silicon with nano technology

Documents