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Sunday, June 16, 2019

#405 MOSFET evolution - alternative solutions

As indicated in the previous blog, solutions concerned with materials and architecture modifications of the MOSFET may not be enough to meet anticipated future needs with regard to the performance of devices designed to carry out logic functions. Therefore, alternative solutions radically departing from the mainstream approaches to transistors’ performance improvements are pursued.


Logic circuits carrying out computational operations, operate based on the binary system needed to code and process information which basically comes to switching the system from one state to another. In electronic devices this function is very efficiently carried out by transistors which turn flow of electrons (current) on and off. The problem is that scattering of electrons moving through the solid accounts for the significant signal losses, and thus, electrons as the carriers of electric charge may not be able to support long-term needs of information processing systems.


One of the solutions being explored is concerned with transistors in which magnetic rather than electric field controls device operation and exploits the fact that in addition to electric charge, electron also features an angular momentum known as electron spin. The spin of the electron can be directed by the magnetic field either up or down. In the sense then, it represents an inherently binary system which spintronics attempts to use in a magnetically sensitive transistor, called a spin transistor, to perform logic functions.

Posted by Jerzy Ruzyllo at 07:17 PM | Semiconductors | Link is the personal blog of Jerzy Ruzyllo. With over 35 years of experience in academic research and teaching in the area of semiconductor engineering (currently holding position of a Distinguished Professor of Electrical Engineering and Professor of Materials Science and Engineering at Penn State University), he has a unique perspective on the developments in this progress driving technical domain and enjoys blogging about it.

With over 2000 terms defined and explained, Semiconductor Glossary is the most complete reference in the field of semiconductors on the market today.

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