Patents by Inventor Fumio Kita

Fumio Kita has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210193879
    Abstract: The present invention relates to a process for manufacturing an optoelectronic device, wherein a layer of a formulation containing a silazane polymer and a wavelength converting material is applied to an optoelectronic device precursor, precured by exposure to radiation and then cured. There is further provided an optoelectronic device, preferably a light emitting device (LED) or a micro-light emitting device (micro-LED), which is prepared by said manufacturing process.
    Type: Application
    Filed: October 10, 2018
    Publication date: June 24, 2021
    Applicant: Merck Patent GmbH
    Inventors: Ralf GROTTENMUELLER, Abraham CASAS GARCIA-MINGUILLAN, Fumio KITA, Christoph LANDMANN, Fabian BLUMENSCHEIN
  • Patent number: 10927220
    Abstract: The present invention relates to silazane-siloxane random copolymers as well as their production and their uses, particularly in LEDs.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: February 23, 2021
    Assignee: AZ ELECTRONIC MATERIALS (LUXEMBOURG) S.A.R.L.
    Inventors: Ralf Grottenmueller, Abraham Casas Garcia-Minguillan, Fumio Kita
  • Patent number: 10822459
    Abstract: The present invention relates to a formulation suitable for the preparation of a highly refractive encapsulation material with good barrier properties towards water vapor for an LED, to an encapsulation material for an LED having a high refractive index and good barrier properties towards water vapor which is obtainable from said formulation and to a light emitting device (LED) comprising said encapsulation material. The formulation comprises a polymer comprising a first repeating unit U1 and a second repeating unit U2; and a surface-modified nanoparticle, wherein the surface-modified nanoparticle does not contain any zirconium dioxide.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: November 3, 2020
    Assignee: AZ Electronic Materials (Luxembourg) S.a.r.l.
    Inventors: Ralf Grottenmueller, Abraham Casas Garcia-Minguillan, Fumio Kita, Dieter Wagner
  • Publication number: 20200255599
    Abstract: The present invention relates to silazane-siloxane random copolymers as well as their production and their uses, particularly in LEDs.
    Type: Application
    Filed: January 19, 2017
    Publication date: August 13, 2020
    Applicant: AZ ELECTRONIC MATERIALS (LUXEMBOURG) S.A.R.L.
    Inventors: Ralf GROTTENMUELLER, Abraham CASAS GARCIA-MINGUILLAN, Fumio KITA
  • Publication number: 20200181332
    Abstract: The present invention relates to a formulation suitable for the preparation of a highly refractive encapsulation material with good barrier properties towards water vapor for an LED, to an encapsulation material for an LED having a high refractive index and good barrier properties towards water vapor which is obtainable from said formulation and to a light emitting device (LED) comprising said encapsulation material. The formulation comprises a polymer comprising a first repeating unit U1 and a second repeating unit U2; and a surface-modified nanoparticle, wherein the surface-modified nanoparticle does not contain any zirconium dioxide.
    Type: Application
    Filed: July 14, 2017
    Publication date: June 11, 2020
    Applicant: AZ Electronic Materials (Luxembourg) S.a.r.l.
    Inventors: Ralf GROTTENMUELLER, Abraham CASAS GARCIA-MINGUILLAN, Fumio KITA, Dieter WAGNER
  • Publication number: 20200141561
    Abstract: The present invention relates to a manufacturing method for a wavelength converting component which is prepared from a dispersion containing a crosslinkable ceramizable polymer material having a silazane repeating unit and at least one wavelength converting material. There are further provided wavelength converting components which can be used for converting blue, violet and/or UV light into light with a longer wavelength. There is also provided a light source and a lighting unit comprising said wavelength converting components.
    Type: Application
    Filed: June 27, 2018
    Publication date: May 7, 2020
    Applicant: Merck Patent GmbH
    Inventors: Ralf GROTTENMUELLER, Abraham CASAS GARCIA-MINGUILLAN, Fumio KITA, Andreas BENKER, Ingo KOEHLER
  • Publication number: 20200083416
    Abstract: The present invention relates to a method for preparing an optoelectronic device comprising a crosslinked polymer material which is prepared from a crosslinkable polymer formulation comprising a polymer with a silazane repeating unit M1 and a Lewis acid curing catalyst. There is further provided a crosslinkable polymer formulation comprising a siloxazane polymer which is particularly suitable for the preparation of technical coatings on articles.
    Type: Application
    Filed: November 30, 2017
    Publication date: March 12, 2020
    Applicant: MERCK PATENT GMBH
    Inventors: Ralf GROTTENMUELLER, Casas Abraham GARCIA-MINGUILLAN, Fumio KITA
  • Publication number: 20200024408
    Abstract: The present invention relates to a crosslinkable polymer formulation comprising a polymer which contains a silazane repeating unit; and a specific boron Lewis acid curing catalyst, wherein the curing catalyst catalyzes the crosslinking of the polymer to obtain a crosslinked polymer composition. The crosslinked polymer composition is particularly suitable as a technical coating for industrial or household applications.
    Type: Application
    Filed: November 30, 2017
    Publication date: January 23, 2020
    Applicant: Merck Patent GmbH
    Inventors: Ralf GROTTENMUELLER, Abraham Casas GARCIA-MINGUILLAN, Fumio KITA, Yoshio NOJIMA, Hironori ENDO, Masakazu KOBAYASHI
  • Patent number: 10487243
    Abstract: The present invention relates to a formulation suitable for the preparation of a highly refractive encapsulation material with good barrier properties towards water vapor for an LED, to an encapsulation material for an LED having a high refractive index and good barrier properties towards water vapor which is obtainable from said formulation and to a light emitting device (LED) comprising said encapsulation material. The formulation comprises a polymer comprising a first repeating unit M1 and a second repeating unit M2; and a surface-modified zirconium dioxide nanocrystal.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: November 26, 2019
    Assignee: AZ Electronic Materials (Luxembourg) S.a.r.l.
    Inventors: Ralf Grottenmueller, Abraham Casas Garcia-Minguillan, Fumio Kita, Dieter Wagner, Robert J. Wiacek, Daniel P. Russell, Zehra Serpil Gonen Williams
  • Publication number: 20190300748
    Abstract: The present invention relates to a formulation suitable for the preparation of a highly refractive encapsulation material with good barrier properties towards water vapor for an LED, to an encapsulation material for an LED having a high refractive index and good barrier properties towards water vapor which is obtainable from said formulation and to a light emitting device (LED) comprising said encapsulation material. The formulation comprises a polymer comprising a first repeating unit M1 and a second repeating unit M2; and a surface-modified zirconium dioxide nanocrystal.
    Type: Application
    Filed: July 14, 2017
    Publication date: October 3, 2019
    Inventors: RALF GROTTENMUELLER, Abraham CASAS GARCIA-MINGUILLAN, Fumio KITA, Dieter WAGNER, Robert J. WIACEK, Daniel P. RUSSELL, Zehra Serpil Gonen WILLIAMS
  • Patent number: 10421841
    Abstract: The present invention relates to a method for producing silazane-siloxa copolymers and the use of such copolymers, particularly in LEDs.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: September 24, 2019
    Assignee: AZ Electronic Materials (Luxembourg) S.a.r.l.
    Inventors: Ralf Grottenmüller, Abraham Casas Garcia-Minguillan, Fumio Kita, Dieter Wagner
  • Patent number: 10385234
    Abstract: The invention relates to the use of a hybrid material comprising a) an organopolysilazane material and b) at least one surface-modified nanoscale inorganic oxide as coating material for producing transparent layers having a thickness of less than 500 ?m in optoelectronic components.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: August 20, 2019
    Assignee: AZ Electronics Materials (LUXEMBOURG) S.Á.R.L.
    Inventors: Ralf Grottenmüller, Rosalin Karunanandan, Fumio Kita, Helmut Lenz, Dieter Wagner, Andreas Dresel
  • Publication number: 20180312641
    Abstract: The present invention relates to a method for producing silazane-siloxa copolymers and the use of such copolymers, particularly in LEDs.
    Type: Application
    Filed: October 4, 2016
    Publication date: November 1, 2018
    Inventors: Ralf GROTTENMÜLLER, Abraham CASAS GARCIA-MINGUILLAN, Fumio KITA, Dieter WAGNER
  • Patent number: 10000665
    Abstract: A hybrid material for light emitting diodes, comprising a) an organopolysilazane material, comprising repeating units of formulae (I) and (II) [—SiR1R2—NR3—]x??(I) [—SiHR4—NR5—]y??(II) wherein the symbols and indices have the following meanings: R1 is C2-C6-alkenyl or C4-C6-alkadienyl; R2 is H or an organic group; R3 is H or an organic group; R4 is H or an organic group; R5 is H or an organic group; x is 0.001 to 0.2; and y is 2x to (1?x), with the proviso that x+y?1 and that y can be 0 if R2 is H, and b) inorganic nanoparticles having a mean diameter in the range of from 1 to 30 nm, which are surface modified with a capping agent comprising a C1-C18-alkyl and/or C1-C18-alkenyl group, is useful as encapsulation material for LEDs.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: June 19, 2018
    Assignee: AZ Electronic Materials (Luxembourg) S.a.r.l.
    Inventors: Ralf Grottenmüller, Rosalin Karunanandan, Fumio Kita, Helmut Lenz, Dieter Wagner, Andreas Dresel
  • Patent number: 9991182
    Abstract: The invention relates to the use of specific organopolysilazanes as an encapsulation material for light emitting diodes (LED). The organopolysilazane polymers act as insulating filling materials and are stable over temperature and over exposure to ambient UV radiation. The encapsulating material has good thermal stability against discoloration to yellow by aging even at high temperatures which is a key factor for the long lifetime of an LED encapsulant and the LED performance.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: June 5, 2018
    Assignee: AZ Electronic Materials (Luxembourg) S.A.R.L.
    Inventors: Ralph Grottenmüller, Rosalin Karunanandan, Fumio Kita, Helmut Lenz, Dieter Wagner
  • Publication number: 20170210944
    Abstract: The invention relates to the use of a hybrid material comprising a) an organopolysilazane material and b) at least one surface-modified nanoscale inorganic oxide as coating material for producing transparent layers having a thickness of less than 500 ?m in optoelectronic components.
    Type: Application
    Filed: July 28, 2015
    Publication date: July 27, 2017
    Inventors: Ralf Grottenmüller, Rosalin Karunanandan, Fumio Kita, Helmut Lenz, Dieter Wagner, Andreas Dresel
  • Publication number: 20160362580
    Abstract: A hybrid material for light emitting diodes, comprising a) an organopolysilazane material, comprising repeating units of formulae (I) and (II) [—SiR1R2—NR3—]x??(I) [—SiHR4—NR5—]y??(II) wherein the symbols and indices have the following meanings: R1 is C2-C6-alkenyl or C4-C6-alkadienyl; R2 is H or an organic group; R3 is H or an organic group; R4 is H or an organic group; R5 is H or an organic group; x is 0.001 to 0.2; and y is 2x to (1?x), with the proviso that x+y?1 and that y can be 0 if R2 is H, and b) inorganic nanoparticles having a mean diameter in the range of from 1 to 30 nm, which are surface modified with a capping agent comprising a C1-C18-alkyl and/or C1-C18-alkenyl group, is useful as encapsulation material for LEDs.
    Type: Application
    Filed: February 27, 2015
    Publication date: December 15, 2016
    Inventors: Ralf GROTTENMÜLLER, Rosalin KARUNANANDAN, Fumio KITA, Helmut LENZ, Dieter WAGNER, Andreas DRESEL
  • Publication number: 20160172552
    Abstract: The invention relates to the use of specific organopolysilazanes as an encapsulation material for light emitting diodes (LED). The organopolysilazane polymers act as insulating filling materials and are stable over temperature and over exposure to ambient UV radiation. The encapsulating material has good thermal stability against discoloration to yellow by aging even at high temperatures which is a key factor for the long lifetime of an LED encapsulant and the LED performance.
    Type: Application
    Filed: July 16, 2014
    Publication date: June 16, 2016
    Applicant: AZ ELECTRONIC MATERIALS (LUXEMBOURG) S.A.R.L.
    Inventors: Ralph GROTTENMÜLLER, Rosalin KARUNANANDAN, Fumio KITA, Helmut LENZ, Dieter WAGNER
  • Patent number: 8034435
    Abstract: The invention relates to a plastic film with an interference multilayer system applied thereon that comprises at least two layers. Said layers can be obtained by hardening and/or applying thermal treatment to a coating composition containing nanoscale inorganic solid particles having polymerizable and/or polycondensable organic surface groups, thereby forming a layer that is crosslinked by means of the polymerizable and/or polycondensable organic surface groups. The films can be used as an optical laminating film.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: October 11, 2011
    Assignee: Tomoegawa Co., Ltd.
    Inventors: Andreas Zimmermann, Fumio Kita, Anette Berni, Martin Mennig, Peter W. Oliveira, Helmut Schmidt, Takamasa Harada
  • Patent number: 7473721
    Abstract: The invention relates to solid or gel-type nanocomposite material which can be polymerised, containing a) 4.9 95.9 wt. % of a soluble polymer; b) 4-95 wt. % of a partially or totally condensed silane selected from the group of epoxyalkoxysilanes, alkoxysilanes and alkylalkoxysilanes, the silane having an inorganic condensation degree of between 33-100% and an organic conversion degree of between 0-95%; c) 0-60 wt. % of an acrylate; d) 0.1-50 wt. % of surface modified nanometric particles selected from the group of oxides, sulphides, selenides, tellurides, halogenides, carbides, arsenides, antimonides, nitrides, phosphides, carbonates, carboxylates, phosphates, sulphates, silicates, titanates, zirconates, aluminates, stannates, plumbates and a mixed oxides; e) 0-50 wt.-% of a plasticizer; f) 0-5 wt.
    Type: Grant
    Filed: January 3, 2003
    Date of Patent: January 6, 2009
    Assignee: Tomoegawa Co., Ltd.
    Inventors: Takamasa Harada, Fumio Kita, Andreas Zimmermann, Ulrike Dellwo, Martin Mennig, Peter W. Oliveira, Helmut Schmidt, Heike Schneider