Abstract:
A process for fabricating a suspended microelectromechanical system (MEMS) structure comprising epitaxial semiconductor functional layers that are partially or completely suspended over a substrate. A sacrificial release layer and a functional device layer are formed on a substrate. The functional device layer is etched to form windows in the functional device layer defining an outline of a suspended MEMS device to be formed from the functional device layer. The sacrificial release layer is then etched with a selective release etchant to remove the sacrificial release layer underneath the functional layer in the area defined by the windows to form the suspended MEMS structure.
Abstract:
A method for integrating epitaxial, metallic transition metal nitride (TMN) layers within a compound semiconductor device structure. The TMN layers have a similar crystal structure to relevant semiconductors of interest such as silicon carbide (SiC) and the Group Ill-Nitrides (III-Ns) such as gallium nitride (GaN), aluminum nitride (A1N), indium nitride (InN), and their various alloys. Additionally, the TMN layers have excellent thermal stability and can be deposited in situ with other semiconductor materials, allowing the TMN layers to be buried within the semiconductor device structure to create semiconductor/metal/semiconductor heterostructures and superlattices.
Abstract:
A method to remove epitaxial semiconductor layers from a substrate by growing an epitaxial sacrificial layer on the substrate where the sacrificial layer is a transition metal nitride (TMN) or a TMN ternary compound, growing one or more epitaxial device layers on the sacrificial layer, and separating the device layers from the substrate by etching the sacrificial layer to completely remove the sacrificial layer without damaging or consuming the substrate or any device layer. Also disclosed are the related semiconductor materials made by this method.
Abstract:
A service portion of a rail control valve includes a body defining a piston passageway, an inshot valve passageway, and a service accelerated release valve passageway. An inshot valve is received by the inshot valve passageway of the body and a service accelerated release valve is received by the service accelerated release valve passageway.
Abstract:
A printed circuit board (100) and a method (302,304,306,308) for imbedding a battery (106) in the printed circuit board are disclosed. The method includes connecting (302) the battery to a first inner pad (116) and a second inner pad (118) on an inner core layer (104) and forming a first battery contact (122) between a first outer pad (108) and the first inner pad (116). The method also includes electrically isolating (306) the first battery contact (122) and forming a second battery contact (124) between a second outer pad (110) and the second inner pad (118).
Abstract:
A process for fabricating a suspended microelectromechanical system (MEMS) structure comprising epitaxial semiconductor functional layers that are partially or completely suspended over a substrate. A sacrificial release layer and a functional device layer are formed on a substrate. The functional device layer is etched to form windows in the functional device layer defining an outline of a suspended MEMS device to be formed from the functional device layer. The sacrificial release layer is then etched with a selective release etchant to remove the sacrificial release layer underneath the functional layer in the area defined by the windows to form the suspended MEMS structure.
Abstract:
A printed circuit board (100) and a method (302,304,306,308) for imbedding a battery (106) in the printed circuit board are disclosed. The method includes connecting (302) the battery to a first inner pad (116) and a second inner pad (118) on an inner core layer (104) and forming a first battery contact (122) between a first outer pad (108) and the first inner pad (116). The method also includes electrically isolating (306) the first battery contact (122) and forming a second battery contact (124) between a second outer pad (110) and the second inner pad (118).
Abstract:
A printed circuit board (100) and a method (302,304,306,308) for imbedding a battery (106) in the printed circuit board are disclosed. The method includes connecting (302) the battery to a first inner pad (116) and a second inner pad (118) on an inner core layer (104) and forming a first battery contact (122) between a first outer pad (108) and the first inner pad (116). The method also includes electrically isolating (306) the first battery contact (122) and forming a second battery contact (124) between a second outer pad (110) and the second inner pad (118).
Abstract:
A service portion of a rail control valve includes a body defining a piston passageway, an inshot valve passageway, and a service accelerated release valve passageway. An inshot valve is received by the inshot valve passageway of the body and a service accelerated release valve is received by the service accelerated release valve passageway.