Abstract:
A method for through active-silicon via integration is provided. The method comprises forming an electrical device in a handle wafer. The method also comprises forming an isolation layer over the handle wafer and the electrical device and joining an active layer to the isolation layer. Further, the method comprises forming at least one trench through the active layer and the isolation layer to expose a portion of the handle wafer and depositing an electrically conductive material in the at least one trench, the electrically conductive material providing an electrical connection to the electrical device through the active layer.
Abstract:
A voltage converter includes an output circuit having a high-side device and a low-side device which can be formed on a single die (a “PowerDie”). The high-side device can include a lateral diffused metal oxide semiconductor (LDMOS) while the low-side device can include a trench-gate vertical diffused metal oxide semiconductor (VDMOS). The voltage converter can further include a controller circuit on a different die which can be electrically coupled to, and co-packaged with the output circuit.
Abstract:
A power converter device comprises a substrate, a power die mounted on the substrate, and a capacitor die mounted over the power die in a stacked configuration. The capacitor die is electrically coupled to the power die. A packaging material encapsulates the power die and the capacitor die. An integrated circuit die can also be mounted to the substrate and electrically coupled to the power die to receive power signals from the power die, with the packaging material also encapsulating the integrated circuit die.
Abstract:
A Schottky diode comprising a merged guard ring and field plate defining a Schottky contact region is provided. A Schottky metal is formed over at least partially over the Schottky contact region and at least partially over the merged guard ring and field plate.
Abstract:
An inductor may include a planar ferrite core. A first group of one or more grooves is formed in a first side of the ferrite core. A second group of two or more grooves is formed in a second side of the ferrite core. The grooves in the first and second groups are oriented such that each groove in the first group overlaps with two corresponding grooves in the second group. A first plurality of vias communicates through the ferrite core between the first and second sides of the ferrite core. Each via is located where a groove in the first group overlaps with a groove in the second group. A conductive material is disposed in the first and second groups of grooves and in the vias to form an inductor coil.
Abstract:
An inductor may include a planar ferrite core. A first group of one or more grooves is formed in a first side of the ferrite core. A second group of two or more grooves is formed in a second side of the ferrite core. The grooves in the first and second groups are oriented such that each groove in the first group overlaps with two corresponding grooves in the second group. A first plurality of vias communicates through the ferrite core between the first and second sides of the ferrite core. Each via is located where a groove in the first group overlaps with a groove in the second group. A conductive material is disposed in the first and second groups of grooves and in the vias to form an inductor coil.
Abstract:
Power wafer level chip scale package (CSP) and process of manufacture are enclosed. The power wafer level chip scale package includes all source, gate and drain electrodes located on one side of the device, which is convenient for mounting to a printed circuit board (PCB) with solder paste.
Abstract:
High-mobility vertical trench DMOSFETs and methods for manufacturing are disclosed. A source region, a drain region or a channel region of a high-mobility vertical trench DMOSFET may comprise silicon germanium (SiGe) that increases the mobility of the charge carriers in the channel region. In some embodiments the channel region may be strained to increase channel charge carriers mobility.
Abstract:
This invention discloses an improved semiconductor power device includes a plurality of power transistor cells wherein each cell further includes a planar gate padded by a gate oxide layer disposed on top of a drift layer constituting an upper layer of a semiconductor substrate wherein the planar gate further constituting a split gate including a gap opened in a gate layer whereby the a total surface area of the gate is reduced. The transistor cell further includes a JFET (junction field effect transistor) diffusion region disposed in the drift layer below the gap of the gate layer wherein the JFET diffusion region having a higher dopant concentration than the drift region for reducing a channel resistance of the semiconductor power device. The transistor cell further includes a shallow surface doped regions disposed near a top surface of the drift layer under the gate adjacent to the JFET diffusion region wherein the shallow surface doped region having a dopant concentration lower than the JFET diffusion region and higher than the drift layer.
Abstract:
This invention discloses a bottom-anode Schottky (BAS) diode that includes an anode electrode disposed on a bottom surface of a semiconductor substrate. The bottom-anode Schottky diode further includes a sinker dopant region disposed at a depth in the semiconductor substrate extending substantially to the anode electrode disposed on the bottom surface of the semiconductor and the sinker dopant region covered by a buried Schottky barrier metal functioning as an Schottky anode. The BAS diode further includes a lateral cathode region extended laterally from a cathode electrode near a top surface of the semiconductor substrate opposite the Schottky barrier metal wherein the lateral cathode region doped with an opposite dopant from the sinker dopant region and interfacing the sinker dopant region whereby a current path is formed from the cathode electrode to the anode electrode through the lateral cathode region and the sinker dopant region in applying a forward bias voltage and the sinker dopant region depleting the cathode region in applying a reverse bias voltage for blocking a leakage current.