Abstract:
A device includes a first III-V compound layer, a second III-V compound layer, source and drain structures, a gate structure, and a gate field plate. The second III-V compound layer is over the first III-V compound layer. The source and drain structures are over the second III-V compound layer and spaced apart from each other. The gate structure is over the second III-V compound layer and between the source and drain structures. The gate field plate is over the second III-V compound. From a top view the gate field plate forms a strip pattern interposing a stripe pattern of the gate structure and a stripe pattern of the drain structure.
Abstract:
A device includes a first III-V compound layer, a second III-V compound layer, a dielectric layer, a contact, a metal-containing layer, and a metal contact. The second III-V compound layer is over the first III-V compound layer. The dielectric layer is over the second III-V compound layer. The contact extends through the dielectric layer to the second III-V compound layer. The contact is in contact with a top surface of the dielectric layer and an inner sidewall of the dielectric layer. The metal-containing layer is over and in contact with the contact, and a portion of the metal-containing layer is directly above the dielectric layer. The metal contact is over and in contact with the metal-containing layer.
Abstract:
A method for manufacturing semiconductor device includes depositing a contact metal layer over a III-V compound layer. An anti-reflective coating (ARC) layer is deposited over the contact metal layer, and an etch stop layer is deposited over the ARC layer. The etch stop layer, the ARC layer, and the contact metal layer are etched to form a contact stack over the III-V compound layer. A conductive layer is deposited over the III-V compound layer, and the conductive layer is etched to form a gate field plate. The etch stop layer has an etch selectivity different from that of the conductive layer.
Abstract:
A semiconductor structure includes a substrate, a semiconductor device in the substrate, and an isolating structure in the substrate and adjacent to the semiconductor device. The isolating structure has a roughness surface at a sidewall of the isolating structure, and the roughness surface includes carbon atoms thereon.
Abstract:
A high-voltage super junction device is disclosed. The device includes a semiconductor substrate region having a first conductivity type and having neighboring trenches disposed therein. The neighboring trenches each have trench sidewalls and a trench bottom surface. A region having a second conductivity type is disposed in or adjacent to a trench and meets the semiconductor substrate region at a p-n junction. A gate electrode is formed on the semiconductor substrate region and electrically is electrically isolated from the semiconductor substrate region by a gate dielectric. A body region having the second conductivity type is disposed on opposite sides of the gate electrode near a surface of the semiconductor substrate. A source region having the first conductivity type is disposed within in the body region on opposite sides of the gate electrode near the surface of the semiconductor substrate.
Abstract:
A high electron mobility transistor (HEMT) includes a first III-V compound layer, a second III-V compound layer over the first III-V compound layer, source and drain structures over the second III-V compound layer and spaced apart from each other, a gate structure over the second III-V compound layer and between the source and drain structures, a gate field plate over the second III-V compound layer and between the gate structure and the drain structure, and an etch stop layer over the drain structure and spaced apart from the gate field plate.
Abstract:
A semiconductor device includes a first III-V compound layer, a second III-V compound layer over the first III-V compound layer, a source contact and a drain contact over the second III-V compound layer, a gate contact over the second III-V compound layer and between the source contact and the drain contact, a gate field plate over the second III-V compound layer, a first etch stop layer over the source contact, and a second etch stop layer over the drain contact and separated from the first etch stop layer.
Abstract:
A method for forming a semiconductor device includes forming a hard mask layer over a substrate comprising a semiconductor material of a first conductivity type, and forming a plurality of trenches in the hard mask layer and extending into the substrate. Each trench has at least one side wall and a bottom wall. The method further includes forming at least one barrier insulator layer along the at least one side wall and over the bottom wall of each trench, removing the at least one barrier insulator layer over the bottom wall of each trench, and filling the plurality of trenches with a semiconductor material of a second conductivity type.
Abstract:
Some embodiments of the present disclosure relate to a method to increase breakdown voltage of a power device. A power device is formed on a silicon-on-insulator (SOI) wafer made up of a device wafer, a handle wafer, and an intermediate oxide layer. A recess is formed in a lower surface of the handle wafer to define a recessed region of the handle wafer. The recessed region of the handle wafer has a first handle wafer thickness, which is greater than zero. An un-recessed region of the handle wafer has a second handle wafer thickness, which is greater than the first handle wafer thickness. The first handle wafer thickness of the recessed region provides a breakdown voltage improvement for the power device.
Abstract:
A semiconductor device having a super junction structure includes a substrate, an epitaxial layer of a first conductivity type, a first trench, a first doped region of a second conductivity type opposite to the first conductivity type, a second trench and a second doped region of the first conductivity type. The epitaxial layer of the first conductivity type is over the substrate. The first trench is in the epitaxial layer. The first doped region of the second conductivity type is in the epitaxial layer and surrounds the first trench. The second trench is in the epitaxial layer and separated from the first trench. The second doped region of the first conductivity type is in the epitaxial layer and surrounds the second trench. The second doped region has a dopant concentration greater than a dopant concentration of the epitaxial layer. A method for manufacturing the semiconductor device is also provided.