摘要:
A method of producing a four-layer silicon diode, including selecting a first silicon wafer, wherein said first silicon wafer is CZ-grown B-doped with orientation, a resistivity of less than 0.01 Ohm-cm, and an oxygen content of greater than 10 ppma, and then selecting a second silicon wafer, wherein said second silicon wafer is CZ-grown P-doped with orientation, a resistivity of less than 0.005 Ohm-cm, and an oxygen content of greater than 10 ppma, followed by cleaning the respective first and second silicon wafers. The wafers are then HF treated to yield respective first and second cleaned wafers, the first cleaned wafer is positioned into a first furnace and the second cleaned wafer is positioned into a second furnace, wherein the first and second furnaces are not unitary. Next is annealing the respective first and second cleaned wafers in a reducing atmosphere to yield respective first and second respective out-diffused gradient wafers, followed by bonding together respective first and second heat-treated wafers to yield a mated and/or bonded four-layer substrate having a first heavy doped n-type layer, a second gradient doped n-type layer, a third gradient doped p-type layer, and a fourth heavy doped p-type layer.
摘要:
The magnetic food storage is formed from a container and a lid, each with one or more embedded magnets. The magnets interact with each other to hold the containers to each other, hold lids to containers, and hold lids to lids. The magnets are preferably molded inside of the lid and inside the container, the magnets being surrounded by material. This avoids any contact between stored food and the magnets, thus preventing contamination.
摘要:
A training device for use as a playing field obstacle during athletic training exercises. The training device includes a weighted base supportable on an underlying ground surface. The base has at least one wheel enabling ready repositioning of the base on the playing field and an upper wall with an upward-opening slot. The base can also include a dummy obstacle having a body portion and a base plug portion. The base plug portion is receivable within the slot of the base for connecting the dummy obstacle to the base such that, when the dummy obstacle is connected to the base, the body portion of the dummy obstacle is supported in a substantially upright position. The base may further include one or more coaching sticks removably secured within receptacles in a position extending or projecting from the base.
摘要:
An anchoring device for a sports goal, such as a soccer goal, is provided as a portable bag having a pair of laterally spaced-apart weight-carrying compartments interconnected by at least one central strip of material. The central strip defines at least one opening extending between the weight-carrying compartments, and the portable bag is of a size capable of straddling a base rail of a sports goal frame such that the weight-carrying compartments are located on opposite sides of the base rail while the strip extends over the base rail. When the portable bag straddles the base rail, the opening permits a goal net to be fastened to the base rail of the goal frame between the weight-carrying compartments.
摘要:
A vandal resistant sports goal net clip, or fastener, for attaching nets to the frames of sports goals. The fasteners are difficult to remove by hand and require the use of a separate tool to attach and remove the net from the frame. Sports goal assemblies and methods of securing nets to goal frames are also disclosed.
摘要:
An assembly including a tubular connector and at least one framing member having a hollow open end and a longitudinally-extending recessed channel. The recessed channel is formed by at least a pair of opposed inwardly-directed walls having inner peripheral surfaces that taper toward one another in a substantially V-shaped configuration. The connector is slidably received within the hollow end of the framing member and has a longitudinally-extending inset track for cooperatively receiving and engaging the tapered inner peripheral surfaces of the channel walls of the framing member. The inset track has outer peripheral surfaces formed by outwardly tapered walls, whereby when the inset track and recessed channel are urged together by a fastener, a slip-resistant joint is formed therebetween. Sports goal assemblies and methods of assembly are also disclosed.
摘要:
A training device for soccer for placement on a field and for allowing a soccer ball to be rebounded thereoff, kicked therethrough, and played therearound by a soccer player. The device includes a pair of identical supports for placement on a field and a plurality of planks that extend between the pair of supports. The pair of identical supports are inverted U-shaped. The plurality of planks include a plurality of top planks that extend longitudinally from one support to the other support, at their tops. The plurality of top planks are affixed to each support by top carriage bolts that depend through each top plank, through a respective support, and through top washers and threadably engage top nuts, with the plurality of top planks completely closing the training device for soccer, at its top. The plurality of planks further include a plurality of side planks that extend longitudinally from one support to the other support, at their sides. The plurality of side planks are affixed to each support by side carriage bolts that pass laterally through each side plank, through the respective support, and through side washers and threadably engage side nuts, with the plurality of side planks completely closing the training device for soccer, at both its sides, while leaving the training device for soccer completely open at its front, rear, and bottom.
摘要:
The synthesis, functionalization and characterization of borepin-based extended pi-electron molecules is disclosed. Bulky substituents shielded the vacant boron p-orbitals thus allowing synthetic manipulation and purification under ambient lab conditions. The presently disclosed borepin-containing compounds displayed reversible cathodic electrochemistry and can be viewed as n-type analogues to bent acene hydrocarbons.
摘要:
Systems and methods are provided that programmatically provide a user interface for forming a query, comprising. A query builder displays a first row of query criteria, a second row of query criteria, the second row being logically connected to the first row by a first Boolean connector, and a third row of query criteria, the third row being logically connected to the second row by a second Boolean connector. In response to a user drag-and-drop operation, the query builder nests the third row of query criteria in the second row of query criteria. Thus, a drag-and-drop operation obviates the need for cumbersome groups of parentheses when defining the order of operation of the query.
摘要:
A sports goal assembly having a goal frame defining an upright goalmouth on a shared soccer/football playing field is provided. The goal frame includes a spaced-apart, opposed pair of elongate base rails that each extend rearward of the goalmouth and along and parallel to an underlying surface of the playing field to support the goal assembly on the playing field. An elongate base crossbar interconnects the base rails and extends transversely therebetween. Each of the elongate base rails includes a front section adjacent the goalmouth, a rear section remote from the goalmouth, and an intermediate section. The base crossbar is connected to, and extends from, the intermediate sections of the base rails, and the rear sections of the base rails include counterbalancing weights to stabilize the goal assembly.