Engineering Projects

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Spin transistors to keep Moore's Law and Spin Memory future memory of the world of electronics Posted: 16 Dec 2010 10:33 PM PST Spin transistors to keep Moore's Law and Spin Memory future memory of the world of electronics The transistor densities in a single chip has been increased and designed to keep the Moore's law lively. However with today's technology, the trend  has to change otherwise at one point the quantum effects will not permit and Moore's law can not be meet out. In order to overcome this problem, the spintronics technology which is spin based electronics, is going to take over the conventional chip technology. Basics of Spin electronics Technology: Spin is a basic unit of quantum properties of electron  and sub atomic particles. Spin can have two states relative to a magnetic field which is referred as up and down. These two states can be represented as two values of binary (0 and 1) for storing a bit. We can manipulate these states which is faster and required less energy and can take smaller scales. Hence, chips can be built with spin transistors which are so faster and more powerful than the traditional transistors.  Spin Memory                                                 Image courtesy: IEEE Spectrum Magazine. Spin Memories are built with the spintronics technology called as MRAM (stands for Magneto resistive RAM) . This MRAM stores the bits in a ferromagnetic substance  in which data bits are stored by making alignment of electrons in one directions or others. The spin up means 0  and spin down means 1. With this technology, we can perform erase, read and write operation.  The features of spin memory are High densities,  fast read and write speeds,  low power consumption and  unlimited write operation possible.  It can be used as a universal nonvolatile memory. Dimension in the order of 150nm. For further information, read the IEEE Spectrum Magazine.

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