国云川
  • 学位:工学博士学位
  • 职称:副教授
  • 所在单位:电子科学与工程学院
教师拼音名称:Guo Yunchuan
电子邮箱:ycguo@uestc.edu.cn
所在单位:电子科学与工程学院
学历:博士研究生毕业
办公地点:Research Building B359
性别:
在职信息:解除合同
毕业院校:英国拉夫堡大学
硕士生导师
学科:工学

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IBM clocks graphene transistor at 155GHz
发布时间:2017-11-07    点击次数:

Lucy Sherriff

IBM has demonstrated a new super whizzy graphene transistor, clocking in at 155GHz, up from the 100GHz it benched last year.

The breakthrough was made possible because the transistor was set on a substrate of “diamond-like carbon”, itself layered on a commercial silicon wafer.

The diamond-like layer is a non-polar dielectric material. This means it does not trap charges, and it deals with the problem of scattering, a phenomenon which can “seriously degrade the electronic properties of graphene…. This scattering, which drastically limits the speed of the electrons and holes, comes about due to interactions between graphene and the dielectric substrate material” (per PhysicsWorld).

According to PC World Yu-Ming Lin, an IBM researcher, said that the company’s research had also shown that these transistors could be made using “standard semiconductor manufacturing processes”, raising the possibility of commercial production of graphene components.

IBM’s researcher Phaedon Avouris said there is still more to come from graphene: “The cut-off frequency we obtained is the highest so far for transistors made from CVD-graphene. However, it is not, by far, the limit of what can be achieved because the quality of the CVD-graphene we used was modest (it’s carrier mobility was less than 1000 cm2/Vs).”


个人简介

作为课题负责人或主研人员参与了国家自然科学基金、国家科技重大专项、973项目、英国工程与自然科学基金(EPSRC)项目等多个项目。主要研究方向包括:微波集成电路、先进电子材料与器件、相控阵技术与应用等。

在IEEE Trans. on MTT、IEE Proc. SMT、Journal of Optics等国内外期刊和会议上发表论文一百余篇;担任多个国际学术会议技术委员会委员;担任国家自然科学基金同行评议专家;担任国际无线电科学联盟(URSI)年度奖评审专家。

招收研究生专业:

080904电磁场与微波技术

01方向:微波理论

02方向:微波毫米波电路与系统

08方向:微波集成电路



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