Abstract:
A method for fabricating germanium-on-insulator (GOI) substrate materials, the GOI substrate materials produced by the method and various structures that can include at least the GOI substrate materials of the present invention are provided. The GOI substrate material include at least a substrate, a buried insulator layer located atop the substrate, and a Ge-containing layer, preferably pure Ge, located atop the buried insulator layer. In the GOI substrate materials of the present invention, the Ge-containing layer may also be referred to as the GOI film. The GOI film is the layer of the inventive substrate material in which devices can be formed.
Abstract:
A method for spalling a layer from an ingot of a semiconductor substrate includes forming a metal layer on the ingot of the semiconductor substrate, wherein a tensile stress in the metal layer is configured to cause a fracture in the ingot; and removing the layer from the ingot at the fracture. A system for spalling a layer from an ingot of a semiconductor substrate includes a metal layer formed on the ingot of the semiconductor substrate, wherein a tensile stress in the metal layer is configured to cause a fracture in the ingot, and wherein the layer is configured to be removed from the ingot at the fracture.
Abstract:
A semiconductor is disclosed with a substrate doped with a substrate doping. There is a crystalline semiconductor layer disposed on a front side of the substrate. The crystalline semiconductor layer has a layer doping. The substrate doping changes to the layer doping within a 100 angstrom transition region. In alternative embodiments, the layer doping has novel profiles. In other alternative embodiments, the substrate has a crystalline semiconductor layers disposed on each of a front and a back side of the substrate. Each of the crystalline semiconductor layers has a respective layer doping and each of these layer dopings changes to the substrate doping within a respective transition region less than 100 angstroms thick. In still other embodiments of this invention, an amorphous silicon layer is disposed on a side of the crystalline semiconductor layer opposite the substrate. The amorphous silicon layer has an amorphous doping so that a tunnel junction is formed between the doped crystalline semiconductor layer and the amorphous layer. Manufacturing these structures at below 700 degrees Centigrade enables the narrow transition regions of the structures.
Abstract:
A method for forming a single-junction photovoltaic cell includes forming a dopant layer on a surface of a semiconductor substrate; diffusing the dopant layer into the semiconductor substrate to form a doped layer of the semiconductor substrate; forming a metal layer over the doped layer, wherein a tensile stress in the metal layer is configured to cause a fracture in the semiconductor substrate; removing a semiconductor layer from the semiconductor substrate at the fracture; and forming the single-junction photovoltaic cell using the semiconductor layer. A single-junction photovoltaic cell includes a doped layer comprising a dopant diffused into a semiconductor substrate; a patterned conducting layer formed on the doped layer; a semiconductor layer comprising the semiconductor substrate located on the doped layer on a surface of the doped layer opposite the patterned conducting layer; and an ohmic contact layer formed on the semiconductor layer.
Abstract:
A method of fabricating a strained semiconductor-on- insulator (SSOI) substrate is provided. The method includes first providing a structure that includes a substrate, a doped and relaxed semiconductor layer on the substrate, and a strained semiconductor layer on the doped and relaxed semiconductor layer. In the invention, the doped and relaxed semiconductor layer having a lower lattice parameter than the substrate. Next, at least the doped and relaxed semiconductor layer is converted into a buried porous layer and the structure including the buried porous layer is annealed to provide a strained semiconductor-on-insulator substrate. During the annealing, the buried porous layer is converted into a buried oxide layer.
Abstract:
According to an embodiment of the present invention, a quantum mechanical device includes a monolithic crystalline structure. The monolithic crystalline structure includes a first region doped to provide a first superconducting region, and a second region doped to provide a second superconducting region, the second superconducting region being separated from the first superconducting region by an undoped crystalline region. The first and second superconducting regions and the undoped crystalline region form a Josephson junction.
Abstract:
Es wird eine Festkörperbatterie auf Lithiumbasis mit hoher Lade- und Wiederaufladegeschwindigkeit (über 3 C) bereitgestellt, indem zwischen der Schicht des lithiierten Kathodenmaterials und der Festkörper-Elektrolytschicht auf Lithiumbasis eine Oberflächenschicht eines mit Stickstoff angereicherten lithiierten Kathodenmaterials eingefügt wird. Die Oberflächenschicht des mit Stickstoff angereicherten lithiierten Kathodenmaterials kann durch Einbringen von Stickstoff in ein lithiiertes Kathodenmaterial gebildet werden. Der Stickstoff kann während der abschließenden Stufe eines Abscheidungsverfahrens eingebracht werden, oder über ein anderes Verfahren als ein Abscheidungsverfahren, wie zum Beispiel über eine thermische Nitrierung.
Abstract:
A spall releasing plane 15 is formed in the middle of and embedded within a Group III nitride material layer 14. The spall releasing plane includes a material that has a different strain, a different structure and a different composition compared with the Group III nitride material portions and can be formed by adding impurities during the vapour deposition process. Device layer 16, stressor layer 22 and handle 24 are deposited onto the upper surface of the material layer. An edge exclusion layer 18 and adhesion layer 20 can be added above the device layer to aide in the spalling process. This method overcomes the issue of having a lattice mismatch when using Group III nitride materials, e.g. GaN, AlN, InGaN.