Abstract:
A semiconductor structure (1), comprising: a substrate (2); a base layer (10), the base layer (10) comprising an AlGaN layer, the base layer (10) being arranged above the substrate (2); at least one group of layers (20), the at least one group of layers (20) being arranged above the base layer (10), wherein each of the at least one group of layers (20) comprises: a first layer (21), the first layer (21) being a layer of InGaN and comprising quantum dots (24); a second layer (22), the second layer (22) being a layer of InGaN, the second layer (22) being arranged on and above the first layer (21), wherein the second layer (22) laterally encloses the quantum dots (24) of the first layer (21), wherein a material composition of the InGaN of the second layer (22) is different from a material composition of the InGaN of the first layer (21).
Abstract:
Production of a semiconductor substrate having an silicon-germanium (SiGe) layers (2,3) formed on an silicon substrate (1) comprises heat treating at temperatures exceeding epitaxial growth temperature while or after SiGe layers are formed by epitaxial growth and polishing out surface unevenness produced by the heat treatment after the SiGe layers are formed.
Abstract:
A semiconductor device which can reduce power consumption and a method for manufacturing the same are provided. A semiconductor device comprises an Si (silicon) substrate, an SiC (silicon carbide) layer formed on the surface of the Si substrate, an AlN (aluminum nitride) layer formed on the surface of the SiC layer, an n-type GaN (gallium nitride) layer formed on the surface of the AlN layer, a first electrode formed at the surface side of the GaN layer, and a second electrode formed at the reverse face side of the Si substrate 1. The magnitude of electrical current which flows between the first electrode and the second electrode depends on electrical voltage between the first electrode and the second electrode.
Abstract:
A thermoelectric structure that may be included in a thermoelectric device may include a thin-film structure that may include a plurality of thin-film layers. The thin-film structure may include Tellurium. The thin-film structure may be on a substrate. The substrate may include an oxide, and a buffer layer may be between the substrate and the thin-film structure. The thermoelectric structure may be manufactured via depositing material ablated from a target onto the substrate. Some material may react with the substrate to form the buffer layer, and thin film layers may be formed on the buffer layer. The thin film layers may be removed from the substrate and provided on a separate substrate. Removing the thin-film layers from the substrate may include removing the thin-film layers from the buffer layer.
Abstract:
A quantum well device includes a first layer of a first two-dimensional material, a second layer of a second two-dimensional material, and a third layer of a third two-dimensional material disposed between the first layer and second layer. The first layer, the second layer, and the third layer are adhered predominantly by van der Waals force.
Abstract:
A multilayer graphene, a method of forming the same, a device including the multilayer graphene, and a method of manufacturing the device are provided. In the method of forming the multilayer graphene, a first graphene is formed on an underlayer, and then a multilayer graphene is formed on a first area of the first graphene at a first temperature by using a first source gas, the multilayer graphene comprising a portion of the first graphene corresponding to the first area, wherein a temperature used to form the first graphene is different from the first temperature, or a source gas used to form the first graphene is different from the first source gas.
Abstract:
The invention relates to a process for fabricating a semiconductor including a layer (50) of element-13 nitride comprising active zones (52) for the fabrication of electronic components, and inactive zones (51), the active and inactive zones extending over a front side (53) of the element-13 nitride layer, the concentration of crystal defects in the active zones being lower than the concentration of defects in the inactive zones, the process comprising steps consisting in: using a mask to form, in a starting substrate (10): o first regions for growing the active zones and o second regions (11) for growing the inactive zones, the mask comprising a plurality of apertures each defining an active zone feature on the starting substrate; and growing (700) the element-13 nitride layer comprising the active and inactive zones on the first and second regions, the process being noteworthy in that it furthermore comprises the following steps: receiving a theoretical feature pitch, the theoretical feature pitch corresponding to a desired distance between two adjacent active-zone features on the front side of the element-13 nitride layer; and calculating at least one mask pitch different from the theoretical feature pitch in order to compensate for active-zone feature shifts, the active-zone feature shifts being due to the conditions of growth of the semiconductor, the mask pitch corresponding to a distance between two adjacent apertures in the protective mask.