Abstract:
A silicon carbide (or comparable) trench transistor in which gate dielectric anneal, in an oxynitriding atmosphere, is performed after all other high-temperature steps have already been done.
Abstract:
A vertical power switching device, such as a vertical superjunction metal-oxide- semiconductor field-effect-transistor (MOSFET), in which termination structures in the corners of the integrated circuit are stretched to efficiently shape the lateral electric field. Termination structures in the device include such features as doped regions, field plates, insulator films, and high-voltage conductive regions and elements at the applied substrate voltage. Edges of these termination structures are shaped and placed according to a 2nd-order smooth, non-circular analytic function so as to extend deeper into the die corner from the core region of the device than a constant-distance path. Also disclosed are electrically floating guard rings in the termination region, to inhibit triggering of parasitic p-n-p-n structures.
Abstract:
A semiconductor device includes a layered structure forming multiple carrier channels extending in parallel at different depths of the semiconductor device and a gate electrode having multiple gate fingers of different lengths penetrating the layered structure to reach and control corresponding carrier channels at the different depths. The semiconductor device also includes a carrier electrode having multiple carrier fingers of different lengths penetrating the layered structure to access the corresponding carrier channels. The carrier fingers are interdigitated with the gate fingers.
Abstract:
Thesemiconductor drift devicecomprises a deep well of a first type of electrical conductivity (1) provided for a drift region in asubstrateof semiconductor material, a drain region (6) of the first type of conductivity at the surface of the substrate, a plurality of source regions (5) of the first type of conductivity in shallow wells of the first type of conductivity (3) at the periphery of the deep well of the first type(1), and a deep well or a plurality of deep wells of an oppositesecond type of electrical conductivity (2) provided for a plurality of gate regions at the periphery of the deep well of the first type(1). The gate regions are formed by shallow wells of the second type of electrical conductivity(4), which are arranged in the deep well of the second type (2) between the shallow wells of the first type(3). Significant figure: Figure