Q-factors of CVD monolayer graphene and graphite inductors

doi:10.1088/1361-6463/aa78b5

CORC > 北京大学 > 信息科学技术学院

	Q-factors of CVD monolayer graphene and graphite inductors
	Wang, Zidong ; Zhang, Qingping ; Peng, Pei ; Tian, Zhongzheng ; Ren, Liming ; Zhang, Xing ; Huang, Ru ; Wen, Jincai ; Fu, Yunyi
刊名	JOURNAL OF PHYSICS D-APPLIED PHYSICS
	2017
关键词	graphene graphite inductor Q-factor EPITAXIAL GRAPHENE SPIRAL INDUCTORS TRANSISTORS FREQUENCY FABRICATION CONTACT CIRCUIT
DOI	10.1088/1361-6463/aa78b5
英文摘要	A carbon-based inductor may serve as an important passive component in a carbon-based radio-frequency (RF) integrated circuit (IC). In this work, chemical vapor deposition (CVD) synthesized monolayer graphene and graphite inductors are fabricated and their Q-factors are investigated. We find that the large series resistance of signal path (including coil resistance and contact resistance) in monolayer graphene inductors causes negative Q-factors at the whole frequency range in measurement. Comparatively, some of the graphite inductors have all of their Q-factors above zero, due to their small signal path resistance. We also note that some other graphite inductors have negative Q-factor values at low frequency regions, but positive Q-factor values at high frequency regions. With an equivalent circuit model, we confirm that the negative Q-factors of some graphite inductors at low frequency regions are related to their relatively large contact resistances, and we are able to eliminate these negative Q-factors by improving the graphite-metal contact. Furthermore, the peak Q-factor (Q(p)) can be enhanced by lowering down the resistance of graphite coil. For an optimized 3/4-turn graphite inductor, the measured maximum Q-factor (Q(m)) can reach 2.36 and the peak Q-factor is theoretically predicted by the equivalent circuit to be as high as 6.46 at a high resonant frequency, which is beyond the testing frequency range. This research indicates that CVD synthesized graphite thin film is more suitable than graphene for fabricating inductors in carbon-based RF IC in the future.; National Basic Research Program of China [2011CBA00600, 2011CBA00601, 2013CBA01604]; National Natural Science Foundation of China [60625403]; National Science and Technology Major Project of China [2011ZX02707]; SCI(E); ARTICLE; 34; 50
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/471331]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Wang, Zidong,Zhang, Qingping,Peng, Pei,et al. Q-factors of CVD monolayer graphene and graphite inductors[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2017.
APA	Wang, Zidong.,Zhang, Qingping.,Peng, Pei.,Tian, Zhongzheng.,Ren, Liming.,...&Fu, Yunyi.(2017).Q-factors of CVD monolayer graphene and graphite inductors.JOURNAL OF PHYSICS D-APPLIED PHYSICS.
MLA	Wang, Zidong,et al."Q-factors of CVD monolayer graphene and graphite inductors".JOURNAL OF PHYSICS D-APPLIED PHYSICS (2017).