(Invited) High κ/InGaAs for Ultimate CMOS – Interfacial Passivation, Low Ohmic Contacts, and Device Performance
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Published:2014-03-24
Issue:2
Volume:61
Page:113-124
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ISSN:1938-5862
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Container-title:ECS Transactions
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language:
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Short-container-title:ECS Trans.
Author:
Chang W. H.,Lin T. D.,Liao Min-Han,Pi T. W.,Kwo J. Raynien,Hong Minghwei
Abstract
In-situ atomic layer deposited (ALD)-HfO2 has been used to passivate In0.53Ga0.47As. Atom-to-atom interactions for the interfacial electronic/ chemical characteristics of in-situ ALD-HfO2 on pristine molecular beam epitaxy (MBE) grown In0.53Ga0.47As surface have been studied using synchrotron-radiation photoemission (SRPES). ALD-HfO2/ In0.53Ga0.47As metal-oxide-semiconductor capacitors (MOSCAPs) have exhibited excellent capacitance-voltage (C-V) characteristics. The interfacial trap density spectra in absence of mid-gap peaks were attained. Moreover, 1μm-gate-length self-aligned inversion-channel In0.53Ga0.47As MOS field-effect-transistors (MOSFETs) using in-situ ALD-HfO2 as the gate dielectric have achieved record-high maximum drain current (I
D) of 1.5 mA/μm and peak transconductance (G
m) of 0.84 mS/μm. Moreover, low contact resistivity (ρc) of 6.7×10-9 Ω-cm2 by inserting a 0.6 nm ZnO dielectric layer between titanium metal and InGaAs (with Si doping concentration of 1.5×1019 cm-3) has been demonstrated; this contact structure was employed in the source/drain on the implant-free In0.53Ga0.47As quantum-well MOSFETs to obtain peak G
m of 1.25 mS/μm and low source/drain resistance of 190 Ω-μm.
Publisher
The Electrochemical Society
Cited by
1 articles.
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