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Cambridge spin-out company produces graphene sheets one atomic layer thick for wafers

March 22, 2019
Source: ASM International

Paragraf, a recent University of Cambridge spin-out company in England, has started producing graphene – a sheet of carbon just one atomic layer thick – at up to eight inches (20 cm) in diameter, large enough for commercial electronic devices.


Paragraf is producing graphene ‘wafers’ and graphene-based electronic devices that could be used in transistors, where graphene-based chips could deliver speeds more than ten times faster than silicon chips; and in chemical and electrical sensors, where graphene could increase sensitivity by a factor of more than 30. The company’s first device will be available in the next few months.


Graphene’s remarkable properties – stronger than steel, more conductive than copper, highly flexible and transparent – make it ideal for a range of applications. However, its widespread commercial application in electronic devices has been held back by the difficulties associated with producing it at high quality and at high volume. The conventional way of making large-area graphene involves using copper as a catalyst, which contaminates the graphene, making it unsuitable for electronic applications.


Professor Sir Colin Humphreys from the Centre for Gallium Nitride in Cambridge’s Department of Materials Science and Metallurgy, along with his former postdoctoral researchers Dr. Simon Thomas and Dr. Ivor Guiney, developed a new way to make large-area graphene in 2015.

Using their method, the researchers were able form high-quality graphene wafers up to eight inches in diameter, beating not only other university research groups worldwide, but also companies such as IBM, Intel, and Samsung.


The three researchers spun out Paragraf in early 2018. Thomas is currently the company’s CEO and Guiney is its Chief Technology Officer, while Humphreys, who has recently moved to Queen Mary University of London, serves as Chair.

Subject Classifications

Industries and Applications | Electronics

Materials Processing and Treatment

Materials Properties and Performance | Electrical Properties

Materials Properties and Performance | Thermal Properties

Nonmetallic Engineering Materials | Electronic Materials

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