Plastic Memory

ByRaushan Kumar

SinghMCA : 3th Sem

PLASTIC MEMORY

IntroductionWhat Is Plastic Memory?Structure Of Plastic MemorySpin Electronic StructureHow Plastic Memory Works?Read / write dataComparison With Flash MemoryAdvantagesApplications Conclusion

Contents

Main Challenge in Computer Construction is the design of new memory chips with decreased size.

Imagine a scenario where the memory stored in your digital camera or personal digital assistant is partially based one of the most flexible materials made by man: plastic.

Scientists at HP Labs and Princeton University are excited a new memory technology that could store more data and cost less than traditional silicon-based chips for mobile devices such as-

Introduction

handheld computers, cell phones and MP3 players.

A conducting plastic has been used to create a new memory that store mega bit of data in millimeter-square device.

The beauty of the device is that it combine the best of silicon technology and the capability to form a fuse, which does not exist in silicon.

Introduction(Con.)

It is a two terminal device that can be written & erased repeatedly by voltage pulses for e.g. -4V & +4V.

It is a technique that store a megabit of data in a millimeter square device.

It is 10 times denser than current magnetic memories.

Plastic Memory has the potential to become the next generation of storage media.

What is Plastic Memory

A two-terminal device in which an organic semiconducting polymer is placed between two electrodes, Indium Tin Oxide (ITO) and aluminum.

The experimental devices contain two polymer layers.

The first layer consist of PEDOT:PSS to which an inorganic salt (e.g. lithium triflate) and plasticizer (Ethylene Carbonate, EC) have been added.

The second layer consists of poly(3-hexylthiophene) (P3HT) with the plasticizer.

Motion of the ions present in the device under influence of an electric field is expected to switching between a high and a low conduction state, called ON and OFF state of a memory device.

Structure Of Plastic Memory

PEDOT's ability to conduct electricity.It is already used widely as the anti-static coating on camera film. But until now, no one suspected that it could be converted into an insulator.

The material is a blend of a negatively charged polymer called PSS and a positively charged one called PED.

POLYTHYLENE DIOXYTHIOPENE(PEDOT)

It is a thin strip of dark blue organic-based magnet layered with a metallic ferromagnetic and connected to two electrical leads.

The data is recorded &

retrieved from it by controlling the spins of the electrons with a magnetic field.

Spin Electronic Structure

The device is a polymer that conducts low amounts of electricity, but if high amounts are applied it loses its ability to conduct forever.

So the polymer is like a fuse. Too much voltage and it blows.

How It Works

Read / Write Data

For reading For Writing

To read the memory, they run current through the top wire and measure the current in the bottom wire.

No current means the bit is a zero, and current means the bit is a one.

To store the memory, it use the wires and surrounding the PEDOT blob to run either a high or a low current through it.

Electronic Microscopic View

Plastic memory is fast.

Let a devices with a 1GB storage capacity have yielded read/write cycle times that are 10 times

faster than Compact Flash ,typically 2-10MB/s read, 1-4MB/s write. 

It requires far fewer transistors, typically only 0.5M (million) for 1GB of storage (!!) compared to

silicon's 1.5-6.5B (billion).

Comparison With Flash Memory

It has very low power consumption.

It maintains memory even when the power is turned off.

It costs about 5% as much to manufacture compared to silicon-based memory.

Comparison With Flash Memory (Cont.)

One mega bits of information could fit into a millimeter-

square device.

Technology could potentially store more data than

flash, and perhaps even become fast enough to

store videos.

Scientists suggest, producing it wouldn't require high

temperatures or vacuum chambers.

Advantages

It’s a very cheap technology which gives it a upper hand over other technology.

  With PEDOT-based solutions, Jackson and Perlov

said hackers would not be able to erase their IP addresses, so they can be trace out.

Advantages(cont.)

Applications of Plastic Memory

It is 10 times denser than current magnetic memories.

Store mega-bit of data in millimeter-square device. Data can’t be rewritten so suitable for permanent

storage. It requires only few transistors. It cost about 5% as much to manufacture

compared to silicon-based memory. Retain data without power.

Conclusion

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