Patent application number | Description | Published |
20080210662 | THICK POROUS ANODIC ALUMINA FILMS AND NANOWIRE ARRAYS GROWN ON A SOLID SUBSTRATE - The presently disclosed invention provides for the fabrication of porous anodic alumina (PAA) films on a wide variety of substrates. The substrate comprises a wafer layer and may further include an adhesion layer deposited on the wafer layer. An anodic alumina template is formed on the substrate. When a rigid substrate such as Si is used, the resulting anodic alumina film is more tractable, easily grown on extensive areas in a uniform manner, and manipulated without danger of cracking. The substrate can be manipulated to obtain free-standing alumina templates of high optical quality and substantially flat surfaces. PAA films can also be grown this way on patterned and non-planar surfaces. Furthermore, under certain conditions the resulting PAA is missing the barrier layer (partially or completely) and the bottom of the pores can be readily accessed electrically. The resultant film can be used as a template for forming an array of nanowires wherein the nanowires are deposited electrochemically into the pores of the template. By patterning the electrically conducting adhesion layer, pores in different areas of the template can be addressed independently, and can be filled electrochemically by different materials. Single-stage and multi-stage nanowire-based thermoelectric devices, consisting of both n-type and p-type nanowires, can be assembled on a silicon substrate by this method. | 09-04-2008 |
20090026363 | PERFORMANCE ENHANCEMENT THROUGH USE OF HIGHER STABILITY REGIONS AND SIGNAL PROCESSING IN NON-IDEAL QUADRUPOLE MASS FILTERS - A quadrupole mass filter (QMF) is provided. The QMF includes a plurality of rectangular shaped electrodes aligned in a symmetric manner to generate a quadrupole field. An aperture region is positioned in a center region parallel to and adjacent to each of the rectangular shaped electrodes. An incoming ion stream enters the aperture region so as to be controlled by the quadrupole field. A plurality of voltage sources provide a r.f. and d.c. signal to the electrodes for generating the quadrupole field. An auxiliary voltage source applies an auxiliary drive signal to the r.f. and d.c. signal to create new stability boundaries within the standard Mathieu stability regions with high-resolution around operating conditions where there are approximately no higher-order resonances. | 01-29-2009 |
20090026367 | BATCH FABRICATED RECTANGULAR ROD, PLANAR MEMS QUADRUPOLE WITH ION OPTICS - A quadrupole mass filter (QMF) is provided. The QMF includes a plurality of rectangular shaped electrodes aligned in a symmetric manner to generate a quadrupole field. An aperture region is positioned in a center region parallel to and adjacent to each of the rectangular shaped electrodes. An incoming ion stream enters the aperture region so as to be controlled by the quadrupole field. | 01-29-2009 |
20090072750 | DENSE ARRAY OF FIELD EMITTERS USING VERTICAL BALLASTING STRUCTURES - A field emitter array structure is provided. The field emitter array structure includes a plurality of vertical un-gated transistor structures formed on a semiconductor substrate. The semiconductor substrate includes a plurality of vertical pillar structures to define said un-gated transistor structures. A plurality of emitter structures are formed on said vertical un-gated transistor structures. Each of said emitter structures is positioned in a ballasting fashion on one of said vertical un-gated transistor structures so as to allow said vertical ungated transistor structure to effectively provide high dynamic resistance with large saturation currents. | 03-19-2009 |
20110126929 | Microstructures For Fluidic Ballasting and Flow Control - In one example hydraulic ballast of the invention there is provided an input port and an output port through which a prespecified output flow rate is required. There is provided between the input and output ports a ballasting array of columns having a cross-sectional column extent, W, a column pitch, P, and an array length, L, selected based on the required output flow rate, to produce a prespecified pressure drop that enforces the required output flow rate. | 06-02-2011 |
20120273784 | FABRICATION OF ELECTRONIC AND PHOTONIC SYSTEMS ON FLEXIBLE SUBSTRATES BY LAYER TRANSFER METHOD - A transfer layer includes a transparent substrate. A buffer layer is formed on the transparent substrate that comprises PbO, GaN, PbTiO | 11-01-2012 |
20130133757 | SINGLE-USE, PERMANENTLY-SEALABLE MICROVALVE - A microvalve device is provided that includes a through via located in an island structure supported on a thermally-insulating membrane supported by a frame. The through via is surrounded by a meltable sealing material. A heater element is positioned on the island structure for sealing the material over the through via by heating the sealing material. | 05-30-2013 |