Plastic Memory

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PLASTIC MEMORY Purna Chandra Sahu MCA : 4 th Sem


Contents Introduction What Is Plastic Memory? Structure Of Plastic Memory Spin Electronic Structure How Plastic Memory Works? Read / write data Comparison With Flash Memory Advantages Applications Conclusion


Introduction 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( Con. ) 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.

What is Plastic Memory:

What is Plastic Memory 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 st o rage media.

Structure Of Plastic Memory:

Structure Of 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.


POLYTHYLENE DIOXYTHIOPENE(PEDOT) 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.

Spin Electronic Structure:

Spin E lectronic Structure 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.

How It Works:

How It Works 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.

Read / Write Data:

Read / Write Data For reading 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. For Writing 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:

Electronic Microscopic View

Comparison With Flash Memory:

Comparison With Flash Memory 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 (Cont.):

Comparison With Flash Memory (Cont.) 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.


Advantages 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(cont.) 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.

Applications of Plastic Memory:

Applications of Plastic Memory


Conclusion 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.

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