A new gate current extraction technique for measurement of on-statebreakdown voltage in HEMTs |
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Authors: | Somerville MH Blanchard R del Alamo JA Duh G Chao PC |
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Affiliation: | MIT, Cambridge, MA; |
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Abstract: | We present a new simple three-terminal technique for measuring the on-state breakdown voltage in HEMTs. The gate current extraction technique involves grounding the source, and extracting a constant current from the gate. The drain current is then ramped from the off-state to the on-state, and the locus of drain voltage is measured. This locus of drain current versus drain voltage provides a simple, unambiguous definition of the on-state breakdown voltage which is consistent with the accepted definition of off-state breakdown. The technique is relatively safe and repeatable so that temperature dependent measurements of on-state breakdown can be carried out. This helps illuminate the physics of both off-state and on-state breakdown |
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