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Samsung Galaxy S5 is $1 in Best Buy Black Friday Sale on 11/23

Samsung Galaxy S5 is $1 in Best Buy Black Friday Sale on 11/23

40-inch TV Black Friday 2014 Deals under $200

40-inch TV Black Friday 2014 Deals under $200

The Best Xbox One Black Friday Deal is not at Target or Walmart

The Best Xbox One Black Friday Deal is not at Target or Walmart

Amazon matches Best Buy's Sony XBR49X850B 4K Ultra HD TV Black Friday 2014 Deal Today

Amazon matches Best Buy's Sony XBR49X850B 4K Ultra HD TV Black Friday 2014 Deal Today

Movie Black Friday 2014 Deals selling Now

Movie Black Friday 2014 Deals selling Now

Samsung's new Transistor dubbed Barristor uses Graphene

May 21 2012, 3:38am CDT | by , in News | Technology News

Samsung's new Transistor dubbed Barristor uses Graphene
 
 

Graphene is touted the "Miracle Material."


Samsung has invented a new transistor structure using graphene, that is aimed to overcome the limits of conventional silicon. Currently, semiconductor devices consist of billions of silicon transistors. To increase the performance of transistors, the options have to been to either reduce the size of individual transistors to shorten the traveling distance of electrons, or to use a material with higher electron mobility which allows for faster electron velocity. For the past 40 years, the industry has been increasing performance by reducing size. However, experts believe we are now nearing the potential limits of scaling down. 

Since graphene possesses electron mobility about 200 times greater than that of silicon, it has been considered a potential substitute. Although one issue with graphene is that, unlike conventional semiconducting materials, current cannot be switched off because it is semi-metallic. This has become the key issue in realizing graphene transistors. Both on and off flow of current is required in a transistor to represent “1” and “0” of digital signals. Previous solutions and research have tried to convert graphene into a semi-conductor. However, this radically decreased the mobility of graphene, leading to skepticism over the feasibility of graphene transistors.


Samsung Advanced Institute of Technology has developed a device that can switch off the current in graphene without degrading its mobility. The demonstrated graphene-silicon Schottky barrier can switch current on or off by controlling the height of the barrier. The new device was named Barristor, after its barrier-controllable feature. 

More details on Samsung's blog.

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