Dow Corning Corporation

Cambridge Enterprise Limited

Dow Silicones Corporation

Rohm & Haas Electronic Materials LLC

Dow Corning Toray Company, Ltd.

Dupont Toray Specialty Materials Kabushiki Kaisha

Ddp Specialty Electronic Materials US 9, LLC

Fumito Nishida

William Alden Crossland

Terry Clapp

Jonathan Hannington

Anthony Bernard Davey

Huan Xu

Omar Farooq

Steven Swier

Russell Keith King

Martin Grasmann

Harry J Coles

Mykhaylo Pivnenko

Oliver Hadeler

Yoshitsugu Morita

Makoto Yoshitake

Randall Gene Schmidt

Tomohiro Iimura

Joo-Nyung Jang

Don Lee Kleyer

Nick Evan Shephard

Masaaki Amako

Yanhu Wei

Hiroaki Yoshida

Stanton James Dent

Yusuke Miyamoto

Jacob William Steinbrecher

Michelle R Cummings

Adam C Tomasik

Anna Ya Ching Feng

Emil Radkov

Russel Keith King

Jonathan Paul Hannington

Donald L Kleyer

Terry Victor Clapp

Harry James Coles

Disclosed is a method of making an optoelectronic device that incorporates a crosslinked resin-linear polyorganosiloxane.

Method of manufacturing an optoelectronic device

A composition comprising: (a) a component comprising units of ArSiO, wherein Aris C-Caryl and units of PhCHSiO, and having Mfrom 20,000 to 90,000; and (b) an elastomeric component comprising: (i) a straight-chain organopolysiloxane having at least two silicon-bonded alkenyl groups and at least one silicon-bonded aryl group; (ii) a branched-chain organopolysiloxane having formula: (RSiO)a(RSiO)b(RSiO)c(SiO)d(XO)e where each R is the same or different C-Chydrocarbyl group, 0.1 to 40 mole % of all R's are alkenyl, more than 10 mole % of all R's are C-Caryl, X is a hydrogen atom or alkyl, a is 0.45 to 0.95, b is 0 to 0.25, c is 0.05 to 0.5, d is 0 to 0.1, e is 0 to 0.1, c/a is 0.1 to 0.5; (iii) an organopolysiloxane having at least two silicon-bonded hydrogen atoms; and (iv) a hydrosilylation catalyst.

Hydrosilylation curable polysiloxane

Described are hydrosilylation-curable polyorganosiloxane compositions containing sulfur, including hydrosilylation-curable polyorganosiloxane prepolymers and hydrosilylation-cured polyorganosiloxane polymer products made therefrom, as well as methods of preparing and using the same, devices comprising or prepared from the same, and sulfur-functional organosiloxanes useful therein.

Sulfur-containing polyorganosiloxane compositions and related aspects

Vacuum lamination methods for forming conformally coated articles having a preformed lamination layer conformally coated to or on an object such as an LED array are provided. These vacuum lamination methods utilize a single heating step to heat a middle portion of the preformed lamination layer to a flowable condition prior to the preformed lamination layer being conformally coated over the article, such as the array of light emitting diodes disposed on an inner portion of a first side of a submount wafer.

Vacuum lamination method for forming a conformally coated article and associated conformally coated articles formed therefrom

This invention relates to a curable silicone composition comprising: (A) a straight-chain organopolysiloxane having at least two alkenyl groups in a molecule; (B) an organopolysiloxane represented by the following average unit formula: (RSiO)(RSiO)(RSiO)(SiO)(XO)wherein, Reach independently represent an alkyl group having from 1 to 12 carbons, an alkenyl group having from 2 to 12 carbons, an aryl group having from 6 to 20 carbons, an aralkyl group having from 7 to 20 carbons, or a group in which some or all of the hydrogen atoms of these groups are substituted with halogen atoms, with the proviso that at least two Rin a molecule are the alkenyl groups, X is a hydrogen atom or an alkyl group, a is a number from 0 to 0.3, b is 0 or a positive number, c is a positive number, d is a positive number, e is a number from 0 to 0.4, a+b+c+d=1, c/d is a number from 0 to 10, and b/d is a number from 0 to 0.5; (C) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule; (D) a cerium-containing organopolysiloxane; and (E) a hydrosilylation reaction catalyst. The curable silicone composition does not develop cracks due to thermal aging and can form a cured product having little yellow discoloration.

Curable silicone composition, cured product thereof, and optical semiconductor device

An additive for a silicone encapsulant has the structure: (I) RCe(OSi&#x2014;R) I I a Rwherein a is 3 or 4, wherein Rand Rare each &#x2014;O&#x2014;Si(R)(R)(R) and each of R, R, and Ris independently chosen from C-Chydrocarbyl groups, C-Calkyl groups, C-Calkenyl groups, and C-Caryl groups, and wherein Ris independently chosen from C-Chydrocarbyl groups, C-Calkyl groups, C-Calkenyl groups, and C-Caryl groups. More specifically, the cerium is cerium (III) or (IV). The additive is formed using a method that includes the step of reacting cerium metal or a cerium (III) or (IV) compound with a hydroxyl functional organosiloxane. An encapsulant includes the additive and a polyorganosiloxane. The encapsulant can be utilized to form a device that includes an optoelectronic component and the encapsulant disposed on the optoelectronic component. The device is formed using a method that includes the step of disposing the encapsulant on the optoelectronic device.

Additive for a silicone encapsulant

A liquid crystal formulation is described. The liquid crystal formulation comprises a first oligosiloxane-modified nano-phase segregating liquid crystalline material; and at least one additional material selected from a second oligosiloxane-modified nano-phase segregating liquid crystalline material, non-liquid crystalline oligosiloxane-modified materials, organic liquid crystalline materials, or non-liquid crystalline materials, wherein the liquid crystal formulation has an I&#x2192;SmA*&#x2192;SmC* phase transition, with a SmC* temperature range from about 15&#xb0; C. to about 35&#xb0; C., a tilt angle of about 22.5&#xb0;&#xb1;6&#xb0; or about 45&#xb0;&#xb1;6&#xb0;, a spontaneous polarization of less than about 50 nC/cm2., and a rotational viscosity of less than about 600 cP. Devices containing liquid crystal formulations are also described. The device has a stable bookshelf geometry, bistable switching, and isothermal electric field alignment, a response time of less than 500 &#x3bc;s when switched between two stable states, and an electric drive field of less than about 30 V/&#x3bc;m.

Oligosiloxane modified liquid crystal formulations and devices using same

A liquid crystal formulation is described. The liquid crystal formulation comprises a first oligosiloxane-modified nano-phase segregating liquid crystalline material; and at least one additional material selected from a second oligosiloxane-modified nano-phase segregating liquid crystalline material, non-liquid crystalline oligosiloxane-modified materials, organic liquid crystalline materials, or organic non-liquid crystalline materials, wherein the liquid crystal formulation is nano-phase segregated in the SmC* phase, has an I&#x2192;SmC* phase transition, with a SmC* temperature range from about 15&#xb0; C. to about 35&#xb0; C., has a tilt angle of about 22.5&#xb0;&#xb1;6&#xb0; or about 45&#xb0;&#xb1;6&#xb0;, and has a spontaneous polarization of less than about 50 nC/cm2, and a rotational viscosity of less than about 600 cP. Devices containing liquid crystal formulations are also described. The device has a stable bookshelf geometry, bistable switching, and isothermal electric field alignment, a response time of less than 500 &#x3bc;s when switched between two stable states, and an electric drive field of less than about 30 V/&#x3bc;m.

A liquid crystal electro-optic device. The liquid crystal electro-optic device comprises at least one liquid crystal cell comprising: a pair of substrates having a gap therebetween; a pair of electrodes, the pair of electrodes positioned on one of the substrates or one electrode positioned on each substrate; and a ferroelectric, oligosiloxane liquid crystal material disposed in the gap between the pair of substrates, the ferroelectric, oligosiloxane liquid crystal material exhibiting an I-&#x2666; SmC* phase sequence wherein the liquid crystal electro-optic device is bistable in operation. The invention also involves a method for making a liquid crystal electro-optic device.

Bistable ferroelectric liquid crystal devices

Growing community of inventors

Midland, MI, United States of America

Fumito Nishida