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This paper describes fabrication and characterization of AlGaN/GaN HEMTs for large current operation. By depositing a 1000nm-thick Au metal on Ti/Al/Mo/Au source and drain ohmic contacts, a drain current of more than 4 amperes has been achieved with a total gate width of 10 mm. We discuss the dependence of saturation drain current on gate width in terms of Au thickness and source/drain ohmic electrode...
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