摘要:
Methods and structures are provided for formation of devices on substrates including, e.g., lattice-mismatched materials, by the use of aspect ratio trapping and epitaxial layer overgrowth. A method includes forming an opening in a masking layer disposed over a substrate that includes a first semiconductor material. A first layer, which includes a second semiconductor material lattice-mismatched to the first semiconductor material, is formed within the opening. The first layer has a thickness sufficient to extend above a top surface of the masking layer. A second layer, which includes the second semiconductor material, is formed on the first layer and over at least a portion of the masking layer. A vertical growth rate of the first layer is greater than a lateral growth rate of the first layer and a lateral growth rate of the second layer is greater than a vertical growth rate of the second layer.
摘要:
Non-silicon based semiconductor devices are integrated into silicon fabrication processes by using aspect-ratio-trapping materials. Non-silicon light-sensing devices in a least a portion of a crystalline material can output electrons generated by light absorption therein. Exemplary light-sensing devices can have relatively large micron dimensions. As an exemplary application, complementary-metal-oxide-semiconductor photodetectors are formed on a silicon substrate by incorporating an aspect-ratio-trapping technique.
摘要:
Non-silicon based semiconductor devices are integrated into silicon fabrication processes by using aspect-ratio-trapping materials. Non-silicon light-sensing devices in a least a portion of a crystalline material can output electrons generated by light absorption therein. Exemplary light-sensing devices can have relatively large micron dimensions. As an exemplary application, complementary-metal-oxide-semiconductor photodetectors are formed on a silicon substrate by incorporating an aspect-ratio-trapping technique.
摘要:
A surface of the first semiconductor crystalline material has a reduced roughness. A semiconductor device includes a low defect, strained second semiconductor crystalline material over the surface of the first crystalline material. A surface of the strained second semiconductor crystalline material has a reduced roughness. One example includes obtaining a surface with reduced roughness by creating process parameters that reduce impurities at an interfacial boundary between the first and second semiconductor crystalline materials. In one embodiment, the first semiconductor crystalline material can be confined by an opening in an insulator having an aspect ratio sufficient to trap defects using Aspect Ratio Trapping techniques.
摘要:
Non-silicon based semiconductor devices are integrated into silicon fabrication processes by using aspect-ratio-trapping materials. Non-silicon light-sensing devices in a least a portion of a crystalline material can output electrons generated by light absorption therein. Exemplary light-sensing devices can have relatively large micron dimensions. As an exemplary application, complementary-metal-oxide-semiconductor photodetectors are formed on a silicon substrate by incorporating an aspect-ratio-trapping technique.
摘要:
A photodetector having a substrate, a layer gallium nitride based material supported by the substrate, and a pair of electrodes formed by a two-dimensional electron gas at an interface between the layer gallium nitride based material and a barrier layer, the pair of electrodes being substantially transparent to ultraviolet
摘要:
A device includes a crystalline material within an area confined by an insulator. A surface of the crystalline material has a reduced roughness. One example includes obtaining a surface with reduced roughness by using a planarization process configured with a selectivity of the crystalline material to the insulator greater than one. In a preferred embodiment, the planarization process uses a composition including abrasive spherical silica, H2O2 and water. In a preferred embodiment, the area confined by the insulator is an opening in the insulator having an aspect ratio sufficient to trap defects using an ART technique.
摘要翻译:一种器件包括在由绝缘体限制的区域内的结晶材料。 结晶材料的表面具有减小的粗糙度。 一个实例包括通过使用配置有大于1的结晶材料对绝缘体的选择性的平坦化工艺来获得具有减小的粗糙度的表面。 在优选的实施方案中,平坦化方法使用包括研磨球形二氧化硅,H 2 O 2和水的组合物。 在优选实施例中,由绝缘体限制的区域是具有足以使用ART技术捕获缺陷的纵横比的绝缘体中的开口。
摘要:
A semiconductor device includes a layer of a first semiconducting material, where the first semiconducting material is epitaxially grown to have a crystal structure of a first substrate. The semiconductor device further includes a layer of a second semiconducting material disposed adjacent to the layer of the first semiconducting material to form a heterojunction with the layer of the first semiconducting material. The semiconductor device further includes a first component that is electrically coupled to the heterojunction, and a second substrate that is bonded to the layer of the first semiconducting material.
摘要:
A device includes a crystalline material within an area confined by an insulator. A surface of the crystalline material has a reduced roughness. One example includes obtaining a surface with reduced roughness by using a planarization process configured with a selectivity of the crystalline material to the insulator greater than one. In a preferred embodiment, the planarization process uses a composition including abrasive spherical silica, H2O2 and water. In a preferred embodiment, the area confined by the insulator is an opening in the insulator having an aspect ratio sufficient to trap defects using an ART technique.
摘要翻译:一种器件包括在由绝缘体限制的区域内的结晶材料。 结晶材料的表面具有减小的粗糙度。 一个实例包括通过使用配置有大于1的结晶材料对绝缘体的选择性的平坦化工艺来获得具有减小的粗糙度的表面。 在优选的实施方案中,平坦化方法使用包括研磨球形二氧化硅,H 2 O 2和水的组合物。 在优选实施例中,由绝缘体限制的区域是具有足以使用ART技术捕获缺陷的纵横比的绝缘体中的开口。