摘要:
In some embodiments, the present disclosure relates to a semiconductor device, including a substrate including a first semiconductor material and a semiconductor layer extending into an upper surface of the substrate and including a second semiconductor material with a different band gap than the first semiconductor material. The semiconductor device also includes a passive cap including a first dielectric material and disposed along the upper surface of the substrate and on opposite sides of the semiconductor layer, and a photodetector in the semiconductor layer. The first dielectric material includes silicon nitride.
摘要:
In some embodiments, the present disclosure relates to a high-resistivity silicon-on-insulator (SOI) substrate, including a first polysilicon layer arranged over a semiconductor substrate. A second polysilicon layer is arranged over the first polysilicon layer, and a third polysilicon layer is arranged over the second polysilicon layer. An active semiconductor layer over an insulator layer may be arranged over the third polysilicon layer. The second polysilicon layer has an elevated concentration of oxygen compared to the first and third polysilicon layers.
摘要:
The present disclosure provides a semiconductor structure, including a substrate, a first III-V layer over the substrate, having a first band gap, and a second III-V layer over the first III-V layer, having a second band gap. The second III-V layer includes a first surface in contact with the first III-V layer and a second surface opposite to the first surface. The second band gap at the second surface is greater than the second band gap at the first surface. The present disclosure also provides a manufacturing method of the aforesaid semiconductor structure.
摘要:
A method of manufacturing a semiconductor device includes forming a barrier structure over a substrate. The method further includes forming a channel layer over the barrier structure. The method further includes depositing an active layer over the channel layer. The method further includes forming source/drain electrodes over the channel layer. The method further includes annealing the source/drain electrodes to form ohmic contacts in the active layer under the source/drain electrodes.
摘要:
A high electron mobility transistor includes: a first semiconductor layer over a substrate, and a second semiconductor layer over the first semiconductor layer, the second semiconductor layer having a band gap discontinuity with the first semiconductor layer, and at the first semiconductor layer and/or the second conductive layer includes indium. A top layer is over the second semiconductor layer, and a metal layer is over, and extends into, the top layer, the top layer separating the metal layer from the second semiconductor layer. A gate electrode is over the top layer, a third semiconductor layer being between the gate electrode and the top layer, where a sidewall of the third semiconductor layer and a sidewall of the metal layer are separated. A source and drain are on opposite sides of the gate electrode, the top layer extending continuously from below the source, below the gate electrode, and below the drain.
摘要:
A High Electron Mobility Transistor (HEMT) includes a first III-V compound layer having a first band gap, and a second III-V compound layer having a second band gap over the first III-V compound layer. The second band gap is smaller than the first band gap. The HEMT further includes a third III-V compound layer having a third band gap over the second III-V compound layer, wherein the third band gap is greater than the first band gap. A gate electrode is formed over the third III-V compound layer. A source region and a drain region are over the third III-V compound layer and on opposite sides of the gate electrode.
摘要:
A semiconductor device includes a substrate, a channel layer over the substrate, an active layer over the channel layer, and a barrier structure between the substrate and the channel layer. The active layer is configured to cause a two dimensional electron gas (2DEG) to be formed in the channel layer along an interface between the channel layer and the active layer. The barrier structure is configured to block diffusion of at least one of a material of the substrate or a dopant toward the channel layer.
摘要:
A semiconductor device includes a substrate, a channel layer over the substrate, an active layer over the channel layer, a gate structure over the active layer, and a barrier layer between the gate structure and the active layer. The active layer is configured to cause a two dimensional electron gas (2DEG) to be formed in the channel layer along an interface between the channel layer and the active layer. The gate structure is configured to deplete the 2DEG under the gate structure. The gate structure includes a dopant. The barrier layer is configured to block diffusion of the dopant from the gate structure into the active layer.
摘要:
A transistor includes a substrate, a channel layer over the substrate and an active layer over the channel layer. The active layer includes a gradient having a first concentration of a first material at an interface with the channel layer and a second concentration of the first material at a surface opposite the channel layer, and the first concentration is higher than the second concentration.
摘要:
In some embodiments, the present disclosure relates to a high-resistivity silicon-on-insulator (SOI) substrate, including a first polysilicon layer arranged over a semiconductor substrate. A second polysilicon layer is arranged over the first polysilicon layer, and a third polysilicon layer is arranged over the second polysilicon layer. An active semiconductor layer over an insulator layer may be arranged over the third polysilicon layer. The second polysilicon layer has an elevated concentration of oxygen compared to the first and third polysilicon layers.