Osram Sylvania Inc.

Osram Opto Semiconductors Gmbh

Mary Ann Johnson

Gertrud Kräuter

David W Johnston

Alan Piquette

Miguel Galvez

Maxim N Tchoul

Victor E Perez

Kenneth Grossman

Cathy Shaw Trumble

An optoelectronic device and a method of producing an optoelectronic device are disclosed. In an embodiment an optoelectronic device includes components including an active layer stack, a housing and electrical contacts and at least one protective layer on a surface of at least one of the components, wherein the at least one protective layer includes a cross-linked material with a three-dimensional polysiloxane-based network.

Optoelectronic device and method of producing an optoelectronic device

An LED light source () comprises a ceramic substrate () with first and second opposed surfaces (). Pockets () are formed in the first surface () and each of the pockets includes a bottom () and a sidewall or sidewalls (). A final electrical contact () comprised of a first electrically conductive material () with a coating of a second electrically conductive material () thereover is positioned in each of the pockets (). An LED () is positioned in each of the pockets () and affixed to the electrical contact () and electrical connections (), preferably in form of wire bonds, join the LEDs, the electrical connections () extending from a first LED () to an adjacent electrical contact (). The ceramic substrate () is formed by injection molding a ceramic material and binder to form a green substrate () and subsequently sintering the green substrate to form the substrate (). An LED light () can be formed from the LED light source () by adding a dome () formed of a ceramic material containing therein a homogeneous dispersion of a phosphor material capable of emitting light when excited by the light emitted from the operating LEDs ().

Light emitting diode light source having a ceramic substrate

A method of making a standard tool for calibrating polarimeters that analyze stress in photoelastic material, includes the steps of partially annealing a starting piece of tempered glass so that the starting piece has a retardance below 250 nm/cm, removing a peripheral portion of the starting piece (preferably, at least about 20% of its radial dimension) to leave a working piece, cutting a rectangular parallelepiped from the working piece, polishing two opposing faces of the rectangular parallelepiped where the two opposing faces are spaced apart by a measurement distance through which light passes during stress analysis in a polarimeter, and determining a birefringence of the rectangular parallelepiped across the measurement distance using a calibrated polarimeter. The standard tool is the rectangular parallelepiped having the determined birefringence for the measurement distance. The method can be used to make a set of the standard tools with different measurement distances.

Method of making a standard tool for calibrating stress analysis measuring devices and a set of the standard tools

A luminescent nanophase binder is provided for use in UV and VUV applications. The binder promotes adherence of phosphor coatings to lamp envelopes and emits visible light under UV and VUV excitation. In a preferred embodiment, the binder comprises SiO nanoparticles doped with terbium or terbium and yttrium. Preferably, the nanoparticles have a particle size of less than 50 nm.

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Rockport, MA, United States of America

Mary Ann Johnson