Proceedings of the Korean Vacuum Society Conference (한국진공학회:학술대회논문집)
- 2013.08a
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- Pages.212-212
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- 2013
Fabrication of top gate Graphene Transistor with Atomic Layer Deposited $Al_2O_3$
Abstract
We fabricate and characterize top gate Graphene transistor using aluminum oxide as a gate insulator by atomic layer deposition (ALD). It is found that due to absence of functional group and dangling bonds, ALD of metal oxide is difficult on Graphene. Here we used 4-mercaptopheneol as a functionalization layer on Graphene to facilitate uniform oxide coverage. Contact angle measurement and Atomic force microscopy were used to confirm uniform oxide coverage on Graphene. Raman spectroscopy revealed that functionalization with 4-mercaptopheneol does not induce any defect peak on Graphene. Our device shows mobility values of 4,000