摘要:
A method of forming a thin III-V semiconductor film on a semiconductor substrate, where the lattice structure of the III-V film is different than the lattice structure of the substrate. The method includes epitaxially growing the III-V film on the substrate until the III-V film is greater than 3.0 μm thick and then removing a portion of the III-V film until it is less than 3.0 μm thick. In one implementation, the III-V film is grown until it is around 8.0 μm to 10.0 μm thick, and then it is etched or polished until its thickness is reduced to 0.1 μm to 3.0 μm thick. By over-growing the III-V film, effects such as dislocation gliding and annihilation reduce the dislocation density of the film, thereby improving its electric mobility.
摘要:
A stacking fault and twin blocking barrier for forming a III-V device layer on a silicon substrate and the method of manufacture is described. Embodiments of the present invention enable III-V InSb device layers with defect densities below 1×108 cm−2 to be formed on silicon substrates. In an embodiment of the present invention, a buffer layer is positioned between a III-V device layer and a silicon substrate to glide dislocations. In an embodiment of the present invention, GaSb buffer layer is selected on the basis of lattice constant, band gap, and melting point to prevent many lattice defects from propagating out of the buffer into the III-V device layer. In a specific embodiment, a III-V InSb device layer is formed directly on the GaSb buffer.
摘要翻译:描述了在硅衬底上形成III-V器件层的层叠故障和双阻挡屏障及其制造方法。 本发明的实施方案能够在硅衬底上形成缺陷密度低于1×10 8 cm -2的III-V InSb器件层。 在本发明的实施例中,缓冲层位于III-V器件层和硅衬底之间以滑动位错。 在本发明的一个实施例中,基于晶格常数,带隙和熔点选择GaSb缓冲层,以防止许多晶格缺陷从缓冲器传播到III-V器件层中。 在具体实施例中,III-V InSb器件层直接形成在GaSb缓冲器上。
摘要:
A composite buffer architecture for forming a III-V device layer on a silicon substrate and the method of manufacture is described. Embodiments of the present invention enable III-V InSb device layers with defect densities below 1×108 cm−2 to be formed on silicon substrates. In an embodiment of the present invention, a dual buffer layer is positioned between a III-V device layer and a silicon substrate to glide dislocations and provide electrical isolation. In an embodiment of the present invention, the material of each buffer layer is selected on the basis of lattice constant, band gap, and melting point to prevent many lattice defects from propagating out of the buffer into the III-V device layer. In a specific embodiment, a GaSb/AlSb buffer is utilized to form an InSb-based quantum well transistor on a silicon substrate.
摘要:
Various embodiments provide a buffer layer that is grown over a silicon substrate that provides desirable device isolation for devices formed relative to III-V material device layers, such as InSb-based devices, as well as bulk thin film grown on a silicon substrate. In addition, the buffer layer can mitigate parallel conduction issues between transistor devices and the silicon substrate. In addition, the buffer layer addresses and mitigates lattice mismatches between the film relative to which the transistor is formed and the silicon substrate.
摘要:
A device grade III-V quantum well structure formed on a silicon substrate using a composite buffer architecture and the method of manufacture is described. Embodiments of the present invention enable III-V InSb quantum well device layers with defect densities below 1×108 cm−2 to be formed on silicon substrates. In an embodiment of the present invention, an InSb quantum well layer is sandwiched between two larger band gap barrier layers. In an embodiment of the present invention, InSb quantum well layer is strained. In a specific embodiment, the two larger band gap barrier layers are graded.
摘要:
Various embodiments proved a buffer layer that is grown over a silicon substrate that provides desirable isolation for devices formed relative to III-V material device layers, such as InSb-based devices, as well as bulk thin film grown on a silicon substrate. In addition, the buffer layer can mitigate parallel conduction issues between transistor devices and the silicon substrate. In addition, the buffer layer addresses and mitigates lattice mismatches between the film relative to which the transistor is formed and the silicon substrate.
摘要:
A device grade III-V quantum well structure formed on a silicon substrate using a composite buffer architechture and the method of manufacture is described. Embodiments of the present invention enable III-V InSb quantum well device layers with defect densities below 1×108 cm−2 to be formed on silicon substrates. In an embodiment of the present invention, an InSb quantum well layer is sandwiched between two larger band gap barrier layers. In an embodiment of the present invention, InSb quantum well layer is strained. In a specific embodiment, the two larger band gap barrier layers are graded.
摘要:
A composite buffer architecture for forming a III-V device layer on a silicon substrate and the method of manufacture is described. Embodiments of the present invention enable III-V InSb device layers with defect densities below 1×108 cm−2 to be formed on silicon substrates. In an embodiment of the present invention, a dual buffer layer is positioned between a III-V device layer and a silicon substrate to glide dislocations and provide electrical isolation. In an embodiment of the present invention, the material of each buffer layer is selected on the basis of lattice constant, band gap, and melting point to prevent many lattice defects from propagating out of the buffer into the III-V device layer. In a specific embodiment, a GaSb/AlSb buffer is utilized to form an InSb-based quantum well transistor on a silicon substrate.
摘要:
A stacking fault and twin blocking barrier for forming a III-V device layer on a silicon substrate and the method of manufacture is described. Embodiments of the present invention enable III-V InSb device layers with defect densities below 1×108 cm−2 to be formed on silicon substrates. In an embodiment of the present invention, a buffer layer is positioned between a III-V device layer and a silicon substrate to glide dislocations. In an embodiment of the present invention, GaSb buffer layer is selected on the basis of lattice constant, band gap, and melting point to prevent many lattice defects from propagating out of the buffer into the III-V device layer. In a specific embodiment, a III-V InSb device layer is formed directly on the GaSb buffer.
摘要翻译:描述了在硅衬底上形成III-V器件层的层叠故障和双阻挡屏障及其制造方法。 本发明的实施方案能够在硅衬底上形成缺陷密度低于1×10 8 cm -2的III-V InSb器件层。 在本发明的实施例中,缓冲层位于III-V器件层和硅衬底之间以滑动位错。 在本发明的一个实施例中,基于晶格常数,带隙和熔点选择GaSb缓冲层,以防止许多晶格缺陷从缓冲器传播到III-V器件层中。 在具体实施例中,III-V InSb器件层直接形成在GaSb缓冲器上。
摘要:
A composite buffer architecture for forming a III-V device layer on a silicon substrate and the method of manufacture is described. Embodiments of the present invention enable III-V InSb device layers with defect densities below 1×108 cm−2 to be formed on silicon substrates. In an embodiment of the present invention, a dual buffer layer is positioned between a III-V device layer and a silicon substrate to glide dislocations and provide electrical isolation. In an embodiment of the present invention, the material of each buffer layer is selected on the basis of lattice constant, band gap, and melting point to prevent many lattice defects from propagating out of the buffer into the III-V device layer. In a specific embodiment, a GaSb/AlSb buffer is utilized to form an InSb-based quantum well transistor on a silicon substrate.