摘要:
The use of XML in the context of a system of instrument modules used to study label free binding interactions. This includes provisions for computer to instrument communication using XML, intramodule communication using XML, a data format in XML and for automated firmware testing using XML.
摘要:
A process for the fabrication of macroporous silicon from silicon wafers. Preferred embodiments include a two-step-etch process that results in a single, macroporous layer of silicon with pore depths of several microns and relatively uniform equivalent diameters with an operator chosen mean equivalent diameter. The mean diameter determined by the operator is a mean diameter within the range of about 40 nm to about 250 nm and is determined, at least in part, by selection of an applied current density. Uniformity of equivalent pore diameter is greatly improved as compared to prior art porous silicon fabrication techniques. In a first electrochemical anodisation step, a macroporous layer is created that is covered by a shallower combination microporous-mesoporous layer. The wafer is removed and the top surface of the wafer is dissolved under alkaline conditions, producing “pits”. These “pits” serve as defect sites during a second electrochemical anodisation step, resulting in a single, uniform, macroporous layer in the silicon wafer. Preferably, the wafer with its porous silicon surface is quickly rinsed in acetone and then pentane to preserve the structure of the pores and prevent collapsing of pore walls. The process of the present invention eliminates the upper, nanoporous region produced by prior art processes. In a preferred embodiment, utilizing a current density of 181.8 mA/cm2 in the two-etch-step process, the resulting mean equivalent pore diameter is about 100 nm with more than half of the equivalent pores diameters within about ±50 nm of the mean equivalent pore diameter. By increasing or decreasing the anodisation current, porous layers with mean diameters within the range of about 40 nm to about 250 nm can be created.
摘要:
An optical cross connect switch. In this switch any optical fiber in an input set of optical fibers, each carrying a communication beam, can be cross connected to any optical fiber in an output set of optical fibers. An alignment beam is added to and aligned co-axially with the communication beam carried by each fiber in the input set of optical fibers to define a communication-alignment beam for each fiber. Each communication-alignment beam is directed within a confined optical pathway to a specific exit aperture in an input array structure. The exit apertures for all of the communication-alignment beams are arranged in a pattern defining an input array so that each communication-alignment beam can be identified by the location of its exit aperture in the input array structure. Each communication-alignment beam is formed into a cross-connection beam by a micro-lens in a first lens micro-lens array. Each cross-connection beam is directed to a lens in a second lens array by two mirrors, a first mirror in a first mirror array and a second mirror in a second mirror array. The lens in the second micro-lens array focuses the communication beams into a specific input aperture of a confined optical pathway, preferably an optical fiber, in an output array structure. Each of the confined optical pathways in the output array structure is optically connected to an optical fiber of an output set of optical fibers. A first detector array located near the second lens array monitors the position of each alignment beam and provides position information to a processor for control of the mirrors in at least one of the mirror arrays.