Polymer Memory


Data Storage

 

 

 

 

 

 

 

 

Swedish company Thin Film believes that the memory of the future will be based on plastic. Very thin sheet of polymer, the nets caught between two tiny electrodes, is a matrix of memory. Each intersection of chess boards electrodes (a wire top layer of polymer, and another - his bottom) is created bistable memory cell. The electrical voltage is attached to this cell, may alter the structure of the polymer, transferring it from one stable state to another. Alternative polymer correspond to the logical state of zeros and ones. This condition may persist long enough time, as well as the changing state of polymer is a chemical nature. For the same reason, the state of the cell volatile. Fig. 1 shows the structure of the matrix memory options. The achieved size of the device were as follows: wire diameter of about 0.5 microns, the thickness of film was in a 0,1-0,5 microns.

Virtually technology for memory, this species may be a polymer lamination roll and work to remind newspaper printing plant. Particularly impressive density of such memories. If a cell SRAM now occupies an area the size of 4-6 square micrometers, the proposed technology will allow memory element to place an area of about one quarter square micrometer. The reason for this - in the absence of cell active elements (transistors). Directions active elements, reading and writing may be on the perimeter of the matrix memory or, alternatively, above or below it. Given that modern memory capacity of one gigabit requires the application of 1.5 to 6.5 billion transistors, the system is limited to a polymer memory about half a million active elements. To increase the memory density polymer sheets can be folded stacked. It is estimated specialists firms ThinFilm, memory device the size of a credit card, built on this technology could store 60 000 films in the standard DVD; or 126 years of music in the standard MP3; or 400 000 compact discs, or 250 million high-resolution digital photos ! Thus, the following path of development systems memory: from the relay to the cathode ray tubes, and then to the magnetic memory of it to silicon, and finally to the polymer. It seems that this picture is in many ways ideal, but time will tell what will be the niche polymer memory in real nanotechnology.