Patent ID: 8507978
Filing Date: 2013-08-13
Classification: H01L

Abstract:
1. An integrated structure that includes a plurality of split-gate trench MOSFETs, comprising: a) a silicon carbide substrate composition; b) a plurality of trenches formed within the silicon carbide substrate composition, each trench being lined with a passivation layer, each trench being substantially filled with a first conductive region and a second conductive region and an insulating material having a dielectric constant similar to a dielectric constant of the silicon carbide substrate composition, the first conductive region being separated from the passivation layer by only the insulating material, the first and second conductive regions forming gate regions for each trench MOSFET of the integrated structure, and the first conductive region and the second conductive region being separated by the passivation layer; c) a doped body region of a first conductivity type formed at an upper portion of the substrate composition; and d) a doped source region of a second conductivity type formed in the doped body region proximate each trench, wherein the second conductivity type is opposite the first conductivity type.