ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

400 GHz Graphene Microprocessors

Updated on December 16, 2014


Graphene atomic structure
Graphene atomic structure | Source


Graphene is part of the exotic materials that allow or promise technology leaps in vast domains, but one of the most interesting directions, replacing of current semi conductive materials hasn’t had a breakthrough until now.

A group of scientist from the University of California, believe they discovered a new way to develop electronic circuits from graphene, which would allow to manufacture processors with speeds far beyond the ones we have today.

Silicon vs Graphene

According to some prognoses, the transistors inside electronic processor will reach the limit of the silicon technology somewhere between 10 and 15 years from now, by that time we should already have new technologies to avoid stagnation. The idea of graphene transistors is not new and functional tests exist, but they are far from being industry ready any time soon.

The fastest graphene transistor has reach the dazzling speed of 427 GHz, surpassing by far the current top speed of 8.5 GHz reached by silicon processors. To be able to function, the atomic layers of graphene need special conditions because they lose a lot of energy and dissipate big amounts of heat.

Silicon transistors have isolating properties when voltage decreases and they become conductive when it increases, this behavior enabling logic gates to be created. Unlike silicon, graphene is conductive no matter what voltage, and the creation of binary circuits raises issues which were already fixed in the laboratory with the limitations mentioned above, through “doping atoms” or physical deformation of graphene sheets.

Tests and issues

US scientist confirm that these trials that try to make graphene behave like doped silicon are wrong. According to published data, the solution would be to approach the technologic issue from a different point of view and speculate on the effect of negative resistivity.

A contra intuitive behavior of many materials, graphene included is the negative resistivity manifests through a drop of voltage due to increased intensity. These changes from bigger tension to a lower one can be used to create triggers in the same way the conductivity switches work for silicon, allowing the creation of a new type of transistor.

Researchers already tested the new technology, managing to create XOR gates with just three graphene transistors, unlike the silicon version which requires eight. This technological leap allows the creation of smaller circuits that will also benefit from impressive jumps in speed, the experimental model running at a mind blowing 400 GHz.

All these attempts are promising, but before we can dream about small processors that run at incredible speeds, somebody must take over the idea, determine clear conditions in which graphene manifests its property of negative resistivity and create complex circuits with these transistors.


    0 of 8192 characters used
    Post Comment

    No comments yet.


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)