Patent ID: 10243057

Abstract:
Representative embodiments provide an InAlN/GaN MISHFET having a predetermined breakdown voltage, calibrated to a permittivity-thickness parameter and selectable before or during transistor fabrication, which can be greater than 700 V for a normally-off InAlN/GaN MISHFET. Representative embodiments include a first dielectric layer coupled to a gate and to an InAlN barrier layer, a second dielectric layer, and an optional third dielectric layer. The first dielectric layer comprises a first dielectric material having a first predetermined thickness and a first relative permittivity. The second dielectric layer comprises a second dielectric material having a second predetermined thickness and a second relative permittivity, with the second relative permittivity greater than or equal to twenty (20), such as HfO2, HfAlOx, HfSiOx, SrTiO2 (STO), HfTiO2, HfYOx, Er2O3, Y2O3, TiO2, ErTiOx, ErxTi1-xOy; AlTiOx, SrTiO3, tantalum oxide, zirconium oxide, barium strontium titanate, barium strontium oxide, strontium oxide, and combinations thereof.