Abstract:
A semiconductor device structure includes a region of semiconductor material with a first major surface and an opposing second major surface. A contact structure is disposed in a first portion of the region of semiconductor material and includes a tub structure extending from adjacent a first portion of the first major surface. A plurality of structures comprising portions of the region of semiconductor material extend outward from a lower surface of the tub structure. In some embodiments, the plurality of structures comprises a plurality of free-standing structures. A conductive material is disposed within the tub structure and laterally surrounding the plurality of structures. In one embodiment, the contact structure facilitates the fabrication of a monolithic series switching diode structure having a low-resistance substrate contact.
Abstract:
A cascode switch structure includes a group III-V transistor structure having a first current carrying electrode, a second current carrying electrode and a first control electrode. A semiconductor MOSFET device includes a third current carrying electrode electrically connected to the second current carrying electrode, a fourth current carrying electrode electrically connected to the first control electrode, and a second control electrode. A first diode includes a first cathode electrode electrically connected to the first current carrying electrode and a first anode electrode. A second diode includes a second anode electrode electrically connected to the first anode electrode and a second cathode electrode electrically connected to the fourth current carrying electrode. In one embodiment, the group III-V transistor structure, the first diode, and the second diode are integrated within a common substrate.
Abstract:
A half-bridge circuit can include a high-side HEMT, a high-side switch transistor, a low-side HEMT, and a low-side switch transistor. The die substrates of the HEMTs can be coupled to the sources of their corresponding switch transistors. In another aspect, a packaged electronic device for a half-bridge circuit can have a design that can use shorter connectors that help to reduce parasitic inductance and resistance. In a further aspect, a packaged electronic device for a half-bridge circuit can include more than one connection along the bottom of the package allows less lead connections along the periphery of the packaged electronic device and can allow for a smaller package.
Abstract:
In one embodiment, a group III-V transistor structure includes a heterostructure disposed on a semiconductor substrate. A first current carrying electrode and a second current carrying electrode are disposed adjacent a major surface of the heterostructure and a control electrode is disposed between the first and second current carrying electrode. A clamping device is integrated with the group III-V transistor structure and is electrically connected to the first current carrying electrode a third electrode to provide a secondary current path during, for example, an electrical stress event.
Abstract:
In one embodiment, a method of forming an MOS transistor includes forming a threshold voltage (Vth) of the MOS transistor to have a first value at interior portions of the MOS transistor and a second value at other locations within the MOS transistor that are distal from the interior portion wherein the second value is less than the first value.
Abstract:
An electronic device can transistor having a channel layer that includes a compound semiconductor material. In an embodiment, the channel layer overlies a semiconductor layer that includes a carrier barrier region and a carrier accumulation region. The charge barrier region can help to reduce the likelihood that de-trapped carriers from the channel layer will enter the charge barrier region, and the charge accumulation region can help to repel carriers in the channel layer away from the charge barrier layer. In another embodiment, a barrier layer overlies the channel layer. Embodiments described herein may help to produce lower dynamic on-resistance, lower leakage current, another beneficial effect, or any combination thereof.
Abstract:
In one embodiment, Group III-nitride materials are used to form a semiconductor device. A fin structure is formed in the Group III-nitride material, and a gate structure, source electrodes and drain electrodes are formed in spaced relationship to the fin structure. The fin structure provides both polar and semi-polar 2DEG regions. In one embodiment, the gate structure is configured to control current flow in the polar 2DEG region. Shield conductor layers are included above the gate structure and in spaced relationship with drain regions of the semiconductor device.