Infineon Technologies Americas Corp.

Infineon Technologies Austria Ag

Siliconix Incorporated

Gianluca Camuso

Florin Udrea

Chiu Ng

Yi Tang

Rajeev Krishna Vytla

Alice Pei-Shan Hsieh

Giorgia Longobardi

Canhua Li

Loizos Efthymiou

Mohamed Imam

Alain Charles

Max Shih-kuan Chen

Shu Yang

Dario Pagnano

Hao-Che Chien

Jinming Sun

A semiconductor device includes a type IV semiconductor base substrate, a first type III-V semiconductor layer formed on a first surface of the base substrate, and a second type III-V semiconductor layer with a different bandgap as the first type III-V being formed on the first type III-V semiconductor layer. The semiconductor device further includes first and second electrically conductive device terminals each being formed on the second type III-V semiconductor layer and each being in ohmic contact with the two-dimensional charge carrier gas. The base substrate includes a first highly doped island that is disposed directly beneath the second device terminal and extends to the first surface of the base substrate. The first highly-doped island is laterally disposed between portions of semiconductor material having a lower net doping concentration than the first highly-doped island.

High voltage blocking III-V semiconductor device

A power semiconductor device and method for making same are disclosed. The device includes a source bonding pad and a drain bonding pad, a drain metallization structure including a drain field plate connected to the drain bonding pad, and a source metallization structure comprising a source field plate connected to the source bonding pad. At least a portion of at least one of the bonding pads is situated directly over an active area. A dimension of at least one of the field plates varies depending upon the structure adjacent to the field plate.

Power semiconductor device with optimized field-plate design

There are disclosed herein various implementations of a bipolar semiconductor device with multi-trench enhancement regions. Such a bipolar semiconductor device includes a drift region having a first conductivity type situated over an anode layer having an opposite, second conductivity type. The device also includes a first control trench extending through an inversion region having the second conductivity type, and further extending into the drift region, the first control trench being adjacent to cathode diffusions. In addition, the device includes first and second depletion trenches, each having a depletion electrode, the first depletion trench being situated between the second depletion trench and the first control trench. An enhancement region having the first conductivity type is localized in the drift region and extends from the first control trench to the first second depletion trench and further from the first depletion trench to the second depletion trench.

Bipolar semiconductor device with multi-trench enhancement regions

A semiconductor device includes a drift region of a first conductivity type, an anode region of a second conductivity type situated below the drift region, an inversion region of the second conductivity type situated above the drift region, an enhancement region of the first conductivity type situated between the drift region and the inversion region, first and second control trenches extending through the inversion region and the enhancement region into the drift region, each control trench being bordered by a cathode diffusion region of the first conductivity type, and a superjunction structure situated in the drift region between the first and the second control trenches so that the superjunction structure does not extend under either the first or the second control trench. The superjunction structure is separated from the inversion region by the enhancement region and includes alternating regions of the first and the second conductivity types.

Semiconductor device having a superjunction structure

There are disclosed herein various implementations of a bipolar semiconductor device with sub-cathode enhancement regions. Such a bipolar semiconductor device includes a drift region having a first conductivity type situated over an anode layer having a second conductivity type opposite the first conductivity type. The bipolar semiconductor device also includes first and second depletion trenches, each having a depletion electrode. In addition, the bipolar semiconductor device includes a first control trench situated between the first and second depletion trenches, the first control trench extending into the drift region and being adjacent to cathode diffusions. An enhancement region having the first conductivity type is localized in the drift region between the first control trench and one or both of the first and second depletion trenches. In one implementation, the bipolar semiconductor device may be an insulated-gate bipolar transistor (IGBT).

Bipolar semiconductor device with sub-cathode enhancement regions

There are disclosed herein various implementations of a bipolar semiconductor device having a deep charge-balanced structure. Such a device includes a drift region having a first conductivity type situated over an anode layer having a second conductivity type. The device also includes a control trench extending through an inversion region having the second conductivity type into the drift region, and bordered by a cathode diffusion having the first conductivity type. In addition, the device includes a deep sub-trench structure situated under the control trench. The deep sub-trench structure includes one or more first conductivity regions having the first conductivity type and one or more second conductivity region having the second conductivity type, the one or more first conductivity regions and the one or more second conductivity regions configured to substantially charge-balance the deep sub-trench structure. In one implementation, the bipolar semiconductor device is an insulated-gate bipolar transistor (IGBT).

Bipolar semiconductor device having a deep charge-balanced structure

There are disclosed herein various implementations of an insulated-gate bipolar transistor (IGBT) having a deep superjunction structure. Such an IGBT includes a drift region having a first conductivity type situated over a collector having a second conductivity type. The IGBT also includes a gate trench extending through a base having the second conductivity type into the drift region. In addition, the IGBT includes a deep superjunction structure situated under the gate trench. The deep superjunction structure includes one or more first conductivity regions having the first conductivity type and two or more second conductivity region having the second conductivity type, the one or more first conductivity regions and the two or more second conductivity regions configured to substantially charge-balance the deep superjunction structure.

IGBT having a deep superjunction structure

There are disclosed herein various implementations of a bipolar semiconductor device having a charge-balanced inter-trench structure. Such a device includes a drift region having a first conductivity type situated over an anode layer having a second conductivity type. The device also includes first and second control trenches extending through an inversion region having the second conductivity type into the drift region, each of the first and second control trenches being bordered by a cathode diffusion having the first conductivity type. In addition, the device includes an inter-trench structure situated in the drift region between the first and second control trenches. The inter-trench structure includes one or more first conductivity regions having the first conductivity type and one or more second conductivity region having the second conductivity type, the one or more first conductivity regions and the one or more second conductivity regions configured to substantially charge-balance the inter-trench structure.

Bipolar semiconductor device having a charge-balanced inter-trench structure

There are disclosed herein implementations of an insulated-gate bipolar transistor (IGBT) having an inter-trench superjunction structure. Such an IGBT includes a drift region having a first conductivity type situated over a collector having a second conductivity type. The IGBT also includes first and second gate trenches extending through a base having the second conductivity type into the drift region, the first and second gate trenches each being bordered by an emitter diffusion having the first conductivity type. In addition, the IGBT includes an inter-trench superjunction structure situated in the drift region between the first and second gate trenches. The inter-trench superjunction structure includes one or more first conductivity regions having the first conductivity type and two or more second conductivity region having the second conductivity type, the one or more first conductivity regions and the two or more second conductivity regions configured to substantially charge-balance the inter-trench superjunction structure.

Growing community of inventors

Cambridge, United Kingdom

Gianluca Camuso