Weijun W Zhou from 5418 April Run Ct, Sugar Land, TX 77479, age 51, Phone: 281 980-9627

Us Patents

Bulk Light Diffuser Composition
view source
US Patent:

7980734, Jul 19, 2011
Filed:

Sep 14, 2007
Appl. No.:

12/442857
Inventors:

Stephen F. Hahn - Lake Jackson TX, US
Kenneth W. Williams - Lake Jackson TX, US
Phillip L. Wing - Houston TX, US
Weijun Zhou - Lake Jackson TX, US
Assignee:

Dow Global Technologies LLC - Midland MI
International Classification:

G02B 5/02
C08L 53/02
US Classification:

362355, 428 13, 524505, 525338
Abstract:

The present invention is a bulk light diffuser material based upon a hydrogenated block copolymer, but including a particulate light diffusing component. The material may be in the form of a film, a sheet or a molded article. When present as a sheet having a thickness of 2 millimeters, the sheet has a percent total transmittance of at least 50% and a haze of at least 70%, measured according to the American Society for Testing and Materials (ASTM) standard D 1003.

Method Of Making Light Emitting Diodes
view source
US Patent:

8257988, Sep 4, 2012
Filed:

May 17, 2011
Appl. No.:

13/109053
Inventors:

Paul Joseph Popa - Auburn MI, US
Garo Khanarian - Princeton NJ, US
Weijun Zhou - Sugar Land TX, US
John R. Ell - Quakertown PA, US
Assignee:

Rohm and Haas Electronic Materials LLC - Marlborough MA
International Classification:

H01L 21/00
US Classification:

438 29, 438 34, 438127, 257791, 257E23116, 257E21502, 430127, 430132, 43013715, 528 31, 528475, 528478, 528588
Abstract:

A method of making a light emitting diode (LED) having an optical element is provided, comprising: providing a curable liquid polysiloxane/TiOcomposite, which exhibits a refractive index of >1. 61 to 1. 7 and which is a liquid at room temperature and atmospheric pressure; providing a semiconductor light emitting diode die having a face, wherein the semiconductor light emitting diode die emits light through the face; contacting the semiconductor light emitting diode die with the curable liquid polysiloxane/TiOcomposite; and, curing the curable liquid polysiloxane/TiOcomposite to form an optical element; wherein at least a portion of the optical element is adjacent to the face.

High Refractive Index Curable Liquid Light Emitting Diode Encapsulant Formulation
view source
US Patent:

8258636, Sep 4, 2012
Filed:

May 17, 2011
Appl. No.:

13/109045
Inventors:

Garo Khanarian - Princeton NJ, US
Paul Joseph Popa - Auburn MI, US
John Ell - Quakertown PA, US
Weijun Zhou - Sugar Land TX, US
Assignee:

Rohm and Haas Electronic Materials LLC - Marlborough MA
International Classification:

H01L 23/29
US Classification:

257788, 257100, 257433, 257787, 257E5102, 257E33059, 257E31117, 257E23116, 257E21499, 257 21502
Abstract:

A curable liquid polysiloxane/TiOcomposite for use as a light emitting diode encapsulant is provided, comprising: a polysiloxane prepolymer with TiOdomains having an average domain size of less than 5 nm, wherein the curable liquid polysiloxane/TiOcomposite contains 20 to 60 mol % TiO(based on total solids); wherein the curable liquid polysiloxane/TiOcomposite exhibits a refractive index of >1. 61 to 1. 7 and wherein the curable liquid polysiloxane/TiOcomposite is a liquid at room temperature and atmospheric pressure. Also provided is a light emitting diode manufacturing assembly.

Light Emitting Diode Manufacturing Method
view source
US Patent:

8450445, May 28, 2013
Filed:

Aug 17, 2011
Appl. No.:

13/211378
Inventors:

John W. Lyons - Midland MI, US
Binghe Gu - Midland MI, US
Allen S. Bulick - Lansdale PA, US
Weijun Zhou - Sugar Land TX, US
Paul J. Popa - Auburn MI, US
Garo Khanarian - Princeton NJ, US
John R. Ell - Quakertown PA, US
Assignee:

Rohm and Haas Electronic Materials LLC - Marlborough MA
Dow Global Technologies LLC - Midland MI
International Classification:

C08G 77/00
US Classification:

528 43
Abstract:

A method of making a light emitting diode (LED) having an optical element is provided, comprising: providing a curable liquid polysiloxane/TiOcomposite, which exhibits a refractive index of >1. 61 to 1. 7 and which is a liquid at room temperature and atmospheric pressure; providing a semiconductor light emitting diode die having a face, wherein the semiconductor light emitting diode die emits light through the face; contacting the semiconductor light emitting diode die with the curable liquid polysiloxane/TiOcomposite; and, curing the curable liquid polysiloxane/TiOcomposite to form an optical element; wherein at least a portion of the optical element is adjacent to the face.

Curable Liquid Composite Light Emitting Diode Encapsulant
view source
US Patent:

8455607, Jun 4, 2013
Filed:

Aug 17, 2011
Appl. No.:

13/211363
Inventors:

Weijun Zhou - Sugar Land TX, US
Binghe Gu - Midland MI, US
John W. Lyons - Midland MI, US
Allen S. Bulick - Lansdale PA, US
Garo Khanarian - Princeton NJ, US
Paul J. Popa - Auburn MI, US
John R. Ell - Quakertown PA, US
Assignee:

Rohm and Haas Electronic Materials LLC - Marlborough MA
Dow Global Technologies LLC - Midland MI
International Classification:

C08G 77/00
US Classification:

528 43
Abstract:

A curable liquid polysiloxane/TiOcomposite for use as a light emitting diode encapsulant is provided, comprising: a polysiloxane with TiOdomains having an average domain size of less than 5 nm, wherein the curable liquid polysiloxane/TiOcomposite contains 20 to 60 mol % TiO(based on total solids); wherein the curable liquid polysiloxane/TiOcomposite exhibits a refractive index of >1. 61 to 1. 7 and wherein the curable liquid polysiloxane/TiOcomposite is a liquid at room temperature and atmospheric pressure. Also provided is a light emitting diode manufacturing assembly.

Melt-Processable, Injection-Moldable Thermoplastic Polymer Composition And Semi-Conductive Devices Fabricated Therewith
view source
US Patent:

8530929, Sep 10, 2013
Filed:

Jul 31, 2009
Appl. No.:

13/056683
Inventors:

Weijun Zhou - Lake Jackson TX, US
Brian Chen - Taipei, TW
Patricia Ansems - Lake Jackson TX, US
Stephen F. Hahn - Midland MI, US
Assignee:

Dow Global Technologies, LLC - Midland MI
International Classification:

H01L 33/56
C08G 63/91
US Classification:

257100, 257788, 257E33059, 525 55
Abstract:

A thermoplastic, hydrogenated vinyl aromatic/conjugated diene block polymer composition, especially a hydrogenated styrene/butadiene triblock composition, functions well as a LED encapsulating material in that it provides one or more of optical clarity, thermal stability, ultraviolet light resistance, melt-processability and injection-moldability. The resulting LED resists deformation after setting or hardening under typical solder reflow conditions.

Composite Laminates And Uses Thereof
view source
US Patent:

8609231, Dec 17, 2013
Filed:

Dec 8, 2010
Appl. No.:

12/963172
Inventors:

Shaofu Wu - Sugar Land TX, US
Peter S. Martin - Houston TX, US
Xuming Chen - Pearland TX, US
Michelle L. Boven - Midland MI, US
Weijun Zhou - Lake Jackson TX, US
Valentina A. Kuznetsova - Midland MI, US
Assignee:

Dow Global Technologies LLC - Midland MI
International Classification:

B32B 7/02
B32B 17/06
US Classification:

428215, 428337, 428412, 428421, 428422, 4284242, 4284255, 428441
Abstract:

The present invention generally relates to composite laminates and uses thereof in articles in need of protection from mechanical damage and water or oxygen based degradation.

Low Birefringent Thermoplastic Lenses And Compositions Useful In Preparing Such Lenses
view source
US Patent:

20100271702, Oct 28, 2010
Filed:

Sep 18, 2008
Appl. No.:

12/810030
Inventors:

Weijun Zhou - Lake Jackson TX, US
Stephen F. Hahn - Midland MI, US
Charles F. Diehl - Blue Bell PA, US
Kurt A. Koppi - Midland MI, US
Assignee:

Dow Global Technologies Inc. - Midland MI
International Classification:

G02B 1/11
C08F 236/10
B29D 11/00
US Classification:

359581, 5253329, 264 11
Abstract:

A lens-forming thermoplastic composition of matter has a crystallinity, as determined in accord with differential scanning calorimetry of from 0 percent to less than 1 percent when the composition comprises a hydrogenated vinyl aromatic/isoprene block copolymer or a crystallinity, as determined in accord with differential scanning calorimetry of from more than 0 percent to less than 1 percent when the composition comprises a hydrogenated vinyl aromatic/butadiene block copolymer. The composition has a birefringence, measured at a wavelength of 633 nanometers, within a range of from 0 to less than 6×10. Molding a melt of these compositions occurs at temperatures within a range from the hydrogenated block copolymer's glass transition minus 20 C. to the glass transition temperature minus 90 C. The compositions suitably form lenses such as an optical pick-up lens, which may be aspherical or have at least one of an irregular surface configuration, a non-uniform thickness or an irregular and non-uniform cross-section.