244 results about "Faceting" patented technology

An optoelectronic device, comprising an active region and a waveguide structure to provide optical confinement of light emitted from the active region; a pair of facets on opposite ends of the device, having opposite surface polarity; and one of the facets which has been roughened by a crystallographic chemical etching process, wherein the device is a nonpolar or semipolar (Ga,In,Al,B)N based device.

A faceted structure is provided that includes a crystalline composition comprising a metal nitride. The metal comprises one or more of aluminum, boron, indium, or gallium. The crystalline composition has at least one exposed surface that is a grain boundary, an etched surface, or a naturally formed facet, and the surface has the same crystallographic orientation of a substrate on which the crystalline composition is grown. A sensor device is provided that includes a faceted structure. Associated methods of making and using the faceted structure in a sensor device are provided.

Annular, linear, and point contact structures are described which exhibit a greatly reduced susceptibility to process deviations caused by lithographic and deposition variations than does a conventional circular contact plug. In one embodiment, a standard conductive material such as carbon or titanium nitride is used to form the contact. In an alternative embodiment, a memory material itself is used to form the contact. These contact structures may be made by various processes, including chemical mechanical planarization and facet etching.

The present invention provides a technique for forming a CMOS structure including at least one pFET that has a stressed channel which avoids the problems mentioned in the prior art. Specifically, the present invention provides a method for avoiding formation of deep canyons at the interface between the active area and the trench isolation region, without requiring a trench isolation pulldown, thereby eliminating the problems of silicide to source/drain shorts and contact issues. At the same time, the method of the present invention provides a structure that allows for a facet to form at the spacer edge, retaining the Miller capacitance benefit that such a structure provides. The inventive structure also results in higher uniaxial stress in the MOSFET channel compared to one which allows for a facet to grow at the trench isolation edge.

A lens for refracting light in three directions, including a lens surface having a repetitive pattern of recessed cavities formed by a repetitive pattern of three substantially planar facets.

An optical element for homogenizing and, possibly, concentrating the output from high-power two-dimensional semiconductor laser arrays, which has the basic shape of a convex-flat cylindrical lens with a facet cut into the convex surface for each individual semiconductor laser bar.

This invention comprises plurality of edge illuminated photodiodes. More specifically, the photodiodes of the present invention comprise novel structures designed to minimize reductions in responsivity due to edge surface recombination and improve quantum efficiency. The novel structures include, but are not limited to, angled facets, textured surface regions, and appropriately doped edge regions.

A method of manufacturing a blisk comprises the steps of cutting a disk to a rough shape comprising a hub with a plurality of blade blanks projecting radially therefrom, machining each blade blank by tangential milling using a tool with a rotation spindle perpendicular to the radial direction to make repeated radial passes, the tool being turned through a facet angle with respect to the disk between each pass. Each blade blank is thus milled to a blade having faceted surfaces. Preferably, the width of each facet is smaller that 5 mm, and adjacent facets subtend angles smaller than 5°, or even more preferably smaller than 3°.

Embodiments of the present invention are directed to a method and system for a gem item report. In one embodiment of the present invention, a plurality of images of a gem item are stored as part of a report for the gem item. In one embodiment, a video of a gem item is stored as part of a report of the gem item. In another embodiment, the images display various characteristics of the gem item, including but not limited to the faceting arrangement, the inclusions, and any markings. In one embodiment, the images are of the gem item under magnification. In one embodiment, the images, taken together, provide a two dimensional or 360-degree three dimensional view of a gem item. In one embodiment, an interface is provided for viewing a stored image of a gem item from a desired perspective and at a desired magnification.

At least a portion of an articulating surface of a facet arthroplasty device may comprise a polycrystalline diamond compact. The polycrystalline diamond compact may be useful to increase the wearability and decrease the coefficient of friction of the at least one articulating surface of the facet arthroplasty device. The polycrystalline diamond compact may be utilized with any facet arthroplasty device and may be formed by any appropriate method including, but not limited to, diamond sintering, chemical vapor deposition, physical vapor deposition, and energy beam ablation/deposition.

Exemplary embodiments provide semiconductor nanowires and nanowire devices/applications and methods for their formation. In embodiments, in-plane nanowires can be epitaxially grown on a patterned substrate, which are more favorable than vertical ones for device processing and three-dimensional (3D) integrated circuits. In embodiments, the in-plane nanowire can be formed by selective epitaxy utilizing lateral overgrowth and faceting of an epilayer initially grown in a one-dimensional (1D) nanoscale opening. In embodiments, optical, electrical, and thermal connections can be established and controlled between the nanowire, the substrate, and additional electrical or optical components for better device and system performance.

Methods and assemblies for the construction of liquid-phase alloy nanoparticles are presented. Particle formation is directed by molecular self-assembly and assisted by sonication. In some embodiments, eutectic gallium-indium (EGaIn) nanoparticles are formed. In these embodiments, the bulk liquid alloy is ultrasonically dispersed, fast thiolate self-assembly at the EGaIn interface protects the material against oxidation. The assembly shell has been designed to include intermolecular hydrogen bonds, which induce surface strain, assisting in cleavage of the alloy particles to the nanoscale. X-ray diffraction and TEM analyses reveal that the nanoscale particles are in an amorphous or liquid phase, with no observed faceting.

Semiconductor photonic device surfaces are covered with a dielectric or a metal protective layer. The protective layer covers the entire device, including regions near facets at active regions, to prevent bare or unprotected semiconductor regions, thereby to form a very high reliability etched facet photonic device.

In an embodiment of the invention, a frictional tissue sampling device with a head designed to be rotated without rotating off the designated site can be used to obtain tissue biopsy samples. A frictional tissue sampling device with a head designed to be rotated without rotating off the designated site can be used to obtain an epithelial tissue biopsy sample from lesions. The device can be otherwise used to sample specific locations. In various embodiments, the head of the device is narrow and pointed with a hybrid pear shaped diamond facet. Abrasive material can be adhered to the facet.

A knife sharpener is provided which is capable of precision sharpening of hunting and similar knives that have a first and second blade face, each of which terminates at a facet that meets the corresponding facet to create the knife edge. At least the first of the blade faces has a lower distinct planar or concave section adjacent the edge facet with the lower planar or concave section of the face being set at an angle to the center line of the blade thickness that is different from the angle of the adjoining upper section of the same blade face located adjacent to the back of the blade. The sharpener includes a sharpening member such as one having an abrasive coated surface. The sharpener also includes a planar angle knife guide surface of a knife guide which is designed for intimate sliding and sustaining contact with the second face of the blade in order to position an edge facet on the first of the faces into precise angular relation with the sharpening surface. The sharpener also includes a knife holding spring that applies force against the first face of the blade predominantly at one or more locations on the lower planar or concave section of the first face that is adjacent to the edge facet being sharpened in order that the lower section adjacent the edge on the second face of the blade is pressured to align with and remain in intimate sliding alignment with the guide surface as the blade edge facet on the first face is being sharpened.

Prior methods of measuring diamond proportions in order to construct a complete model, such as a three dimensional virtual wire-frame model, of a diamond have been found to be inadequate. In particular, there has been no commercially available, automated and objective method for measuring the dimensions of a diamond with similar or greater accuracy as compared with the accuracy that can be achieved with manual gauges or micrometers. The present invention provides a method of measuring a physical characteristic of a facet of a diamond, such as the location of one or more points on an edge of a facet. The method comprises illuminating the diamond to visually distinguish a facet from adjacent facets when viewed from a predetermined location, and then capturing an image of the diamond as viewed from this predetermined location. The image is then analyzed to determine the location of at least one point located on an edge of a facet by identifying a discontinuity in the properties of light transmitted from the diamond to the viewing location.

A sharpener for creating cross-grind knife edges includes a nominally flat annular abrasive sharpening member which could be a ring or a disk and is rotated about its center and held against a moving knife edge facet to simultaneously and sequentially abrade the knife edge at multiple locations on the abrasive member. The disk may be slidably mounted on a shaft in opposition to a spring restraining force. The disk is nominally disposed in a vertical orientation. The sharpener may include multiple stages including a manual stage having a pair of off axis conical shaped rotatable abrasive coated disks which have abrading lines on opposing facets which are not parallel but cross and intersect in a crossing pattern at the blade edge.