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The insulating properties of a-C : H on silicon and metal substrates

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Maguire, PD, Magill, DP, Ogwu, AA and McLaughlin, JAD (2001) The insulating properties of a-C : H on silicon and metal substrates. DIAMOND AND RELATED MATERIALS, 10 (2). pp. 216-223. [Journal article]

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URL: http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TWV-42FS2BN-H-19&_cdi=5572&_user=126978&_orig=search&_coverDate=02%2F28%2F2001&_sk=999899997&view=c&wchp=dGLbVlb-zSkzS&md5=42b78c5eba55c72e35bde9fc9d529ab6&ie=/sdarticle.pdf

DOI: S0925-9635(00)00470-2

Abstract

Amorphous carbon has many important applications. In electronic terms, its use as a dielectric is receiving greater attention. This is particularly important for applications in magnetic head devices as a reader gap insulation layer. Results are presented for resistivity and breakdown fields for hydrogenated amorphous carbon on silicon, undopedand doped with nitrogen, using an atomic flux sourer. Current-voltage characteristics were analysed using a numerical algorithm to determine trap densities. The results indicated that such films can meet the breakdown specifications, on silicon, and that nitrogen doping improves their characteristics. Thickness trends indicate improvements are likely as gaps are scaled. The density of states determination indicated that high breakdown was correlated, in the undoped case, with high DOS but this was not so for the doped films. The DOS was found to increase as the thickness decreased. On substrates other than silicon,the films were observed to have increased roughness, poorer adhesion and a more polymer-like quality. These changes were reflected in a reduction in the observed breakdown field. (C) 2001 Elsevier Science B.V, All rights reserved.

Item Type:Journal article
Keywords:hydrogenated amorphous carbon; current transport; electrical breakdown; density of states
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:308
Deposited By:Mrs Ann Blair
Deposited On:11 Sep 2009 14:25
Last Modified:24 Feb 2014 10:10

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