摘要:
A method of fabricating a rare earth oxide buffered III-N on silicon wafer including providing a crystalline silicon substrate, depositing a rare earth oxide structure on the silicon substrate including one or more layers of single crystal rare earth oxide, and depositing a layer of single crystal III-N material on the rare earth oxide structure so as to form an interface between the rare earth oxide structure and the layer of single crystal III-N material. The layer of single crystal III-N material produces a tensile stress at the interface and the rare earth oxide structure has a compressive stress at the interface dependent upon a thickness of the rare earth oxide structure. The rare earth oxide structure is grown with a thickness sufficient to provide a compressive stress offsetting at least a portion of the tensile stress at the interface to substantially reduce bowing in the wafer.
摘要:
III-N material grown on a buffer on a substrate that includes one of a single crystal silicon or a single crystal sapphire. A buffer of single crystal alloy, including one of ErxAl1-xN or (RE1yRE21-y)xAl1-xN, is positioned on the substrate. A layer of single crystal III-N material is positioned on the surface of the buffer and the single crystal alloy has a lattice constant substantially crystal lattice matched to the layer of single crystal III-N material. When the III-N material is GaN, the x in the formula for the alloy varies from less than 1 adjacent the substrate to greater than or equal to 0.249 adjacent the layer of single crystal GaN.
摘要:
A heterostructure grown on a silicon substrate includes a single crystal rare earth oxide template positioned on a silicon substrate, the template being substantially crystal lattice matched to the surface of the silicon substrate. A heterostructure is positioned on the template and defines at least one heterojunction at an interface between a III-N layer and a III-III-N layer. The template and the heterostructure are crystal matched to induce an engineered predetermined tensile strain at the at least one heterojunction. A single crystal rare earth oxide dielectric layer is grown on the heterostructure so as to induce an engineered predetermined compressive stress in the single crystal rare earth oxide dielectric layer and a tensile strain in the III-III-N layer. The tensile strain in the III-III-N layer and the compressive stress in the REO layer combining to induce a piezoelectric field leading to higher carrier concentration in 2DEG at the heterojunction.
摘要:
A III-N template formed on a silicon substrate includes a Distributed Bragg Reflector positioned on the silicon substrate. The Distributed Bragg Reflector is substantially crystal lattice matched to the surface of the silicon substrate. An aluminum oxide layer is positioned on the surface of the Distributed Bragg Reflector and substantially crystal lattice matched to the surface of the Distributed Bragg Reflector. A layer of aluminum nitride (AlN) is positioned on the surface of the aluminum oxide layer and substantially crystal lattice matched to the surface of the aluminum oxide layer. A III-N LED structure including at least one III-N layer can then be grown on the aluminum nitride layer and substantially crystal lattice matched to the surface of the aluminum nitride layer.
摘要:
A method of growing III-N material on a silicon substrate including the steps of epitaxially growing a buffer layer of REO material on a silicon substrate, epitaxially growing a layer of REN material on the surface of the buffer, and epitaxially growing a thin protective layer of REO on the surface of the REN material layer. The substrate and structure can then be conveniently transferred to another growth machine in which are performed the steps of transforming or modifying in-situ the REO protective layer to a REN layer with a nitrogen treatment and epitaxially growing a layer of III-N material on the modified protective layer.
摘要:
A silicon-on-insulator (SOI) substrate structure and method of fabrication including a single crystal silicon substrate, a layer of single crystal rare earth oxide formed on the substrate, a layer of engineered single crystal silicon formed on the layer of single crystal rare earth oxide, and a single crystal insulator layer of IIIOxNy formed on the engineered single crystal silicon layer. In some embodiments the III material in the insulator layer includes more than on III material. In a preferred embodiment the single crystal rare earth oxide includes Gd2O3 and the single crystal insulator layer of IIIOxNy includes one of AlOxNy and AlGaOxNy.
摘要翻译:一种绝缘体上硅(SOI)衬底结构及其制造方法,包括单晶硅衬底,在衬底上形成的单晶稀土氧化物层,在单晶稀土层上形成的工程化单晶硅层 在工程化的单晶硅层上形成IIIOxNy的单晶绝缘体层。 在一些实施例中,绝缘体层中的III材料包括多于III族材料。 在优选的实施方案中,单晶稀土氧化物包括Gd 2 O 3,并且IIIO x N y的单晶绝缘体层包括AlO x N y和AlGaO x N y之一。
摘要:
III-N material grown on a silicon substrate includes a single crystal rare earth oxide layer positioned on a silicon substrate. The rare earth oxide is substantially crystal lattice matched to the surface of the silicon substrate. A first layer of III-N material is positioned on the surface of the rare earth oxide layer. An inter-layer of aluminum nitride (AlN) is positioned on the surface of the first layer of III-N material and an additional layer of III-N material is positioned on the surface of the inter-layer of aluminum nitride. The inter-layer of aluminum nitride and the additional layer of III-N material are repeated n-times to reduce or engineer strain in a final III-N layer. A cap layer of AlN is grown on the final III-N layer and a III-N layer of material with one of an LED structure and an HEMT structure is grown on the AlN cap layer.
摘要:
III-N material grown on a silicon substrate includes a single crystal buffer positioned on a silicon substrate. The buffer is substantially crystal lattice matched to the surface of the silicon substrate and includes aluminum oxynitride adjacent the substrate and aluminum nitride adjacent the upper surface. A first layer of III-N material is positioned on the upper surface of the buffer. An inter-layer of aluminum nitride (AlN) is positioned on the first III-N layer and an additional layer of III-N material is positioned on the inter-layer. The inter-layer of aluminum nitride and the additional layer of III-N material are repeated n-times to reduce or engineer strain in a final III-N layer.
摘要:
A DBR/gallium nitride/aluminum nitride base grown on a silicon substrate includes a Distributed Bragg Reflector (DBR) positioned on the silicon substrate. The DBR is substantially crystal lattice matched to the surface of the silicon substrate. A first layer of III-N material is positioned on the surface of the DBR, an inter-layer of aluminum nitride (AlN) is positioned on the surface of the first layer of III-N material and an additional layer of III-N material is positioned on the surface of the inter-layer of aluminum nitride. The inter-layer of aluminum nitride and the additional layer of III-N material are repeated n-times to reduce or engineer strain in a final III-N layer.
摘要:
A pumped sensor system includes a substrate with a first layer formed thereon and doped for a first type conduction and a second layer doped for a second type conduction, whereby the first and second layers form a silicon light detector at an up-conversion wavelength. A ternary rare earth oxide is formed on the second layer and crystal lattice matched to the second layer. The oxide is a crystalline bulk oxide with a controlled percentage of an up-conversion component and a majority component. The majority component is insensitive to any of pump, sense, or up-conversion wavelengths and the up-conversion component is selected to produce energy at the up-conversion wavelength in response to receiving energy at the pump and sense wavelengths. The layer of oxide defines a light input area sensitive to a pump wavelength and a light input area sensitive to a sense wavelength.