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).
-
Patent number: 11888095Abstract: 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: GrantFiled: October 10, 2018Date of Patent: January 30, 2024Assignee: MERCK PATENT GMBHInventors: Ralf Grottenmueller, Abraham Casas Garcia-Minguillan, Fumio Kita, Christoph Landmann, Fabian Blumenschein
-
Patent number: 11466839Abstract: 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: GrantFiled: June 27, 2018Date of Patent: October 11, 2022Assignee: Merck Patent GmbHInventors: Ralf Grottenmueller, Abraham Casas Garcia-Minguillan, Fumio Kita, Andreas Benker, Ingo Koehler
-
Publication number: 20210193879Abstract: 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: ApplicationFiled: October 10, 2018Publication date: June 24, 2021Applicant: Merck Patent GmbHInventors: Ralf GROTTENMUELLER, Abraham CASAS GARCIA-MINGUILLAN, Fumio KITA, Christoph LANDMANN, Fabian BLUMENSCHEIN
-
Patent number: 10927220Abstract: The present invention relates to silazane-siloxane random copolymers as well as their production and their uses, particularly in LEDs.Type: GrantFiled: January 19, 2017Date of Patent: February 23, 2021Assignee: AZ ELECTRONIC MATERIALS (LUXEMBOURG) S.A.R.L.Inventors: Ralf Grottenmueller, Abraham Casas Garcia-Minguillan, Fumio Kita
-
Patent number: 10822459Abstract: 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: GrantFiled: July 14, 2017Date of Patent: November 3, 2020Assignee: AZ Electronic Materials (Luxembourg) S.a.r.l.Inventors: Ralf Grottenmueller, Abraham Casas Garcia-Minguillan, Fumio Kita, Dieter Wagner
-
Publication number: 20200255599Abstract: The present invention relates to silazane-siloxane random copolymers as well as their production and their uses, particularly in LEDs.Type: ApplicationFiled: January 19, 2017Publication date: August 13, 2020Applicant: AZ ELECTRONIC MATERIALS (LUXEMBOURG) S.A.R.L.Inventors: Ralf GROTTENMUELLER, Abraham CASAS GARCIA-MINGUILLAN, Fumio KITA
-
Publication number: 20200181332Abstract: 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: ApplicationFiled: July 14, 2017Publication date: June 11, 2020Applicant: AZ Electronic Materials (Luxembourg) S.a.r.l.Inventors: Ralf GROTTENMUELLER, Abraham CASAS GARCIA-MINGUILLAN, Fumio KITA, Dieter WAGNER
-
Publication number: 20200141561Abstract: 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: ApplicationFiled: June 27, 2018Publication date: May 7, 2020Applicant: Merck Patent GmbHInventors: Ralf GROTTENMUELLER, Abraham CASAS GARCIA-MINGUILLAN, Fumio KITA, Andreas BENKER, Ingo KOEHLER
-
Publication number: 20200083416Abstract: 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: ApplicationFiled: November 30, 2017Publication date: March 12, 2020Applicant: MERCK PATENT GMBHInventors: Ralf GROTTENMUELLER, Casas Abraham GARCIA-MINGUILLAN, Fumio KITA
-
Publication number: 20200024408Abstract: 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: ApplicationFiled: November 30, 2017Publication date: January 23, 2020Applicant: Merck Patent GmbHInventors: Ralf GROTTENMUELLER, Abraham Casas GARCIA-MINGUILLAN, Fumio KITA, Yoshio NOJIMA, Hironori ENDO, Masakazu KOBAYASHI
-
Patent number: 10487243Abstract: 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: GrantFiled: July 14, 2017Date of Patent: November 26, 2019Assignee: 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: 20190300748Abstract: 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: ApplicationFiled: July 14, 2017Publication date: October 3, 2019Inventors: RALF GROTTENMUELLER, Abraham CASAS GARCIA-MINGUILLAN, Fumio KITA, Dieter WAGNER, Robert J. WIACEK, Daniel P. RUSSELL, Zehra Serpil Gonen WILLIAMS
-
Patent number: 10421841Abstract: The present invention relates to a method for producing silazane-siloxa copolymers and the use of such copolymers, particularly in LEDs.Type: GrantFiled: October 4, 2016Date of Patent: September 24, 2019Assignee: AZ Electronic Materials (Luxembourg) S.a.r.l.Inventors: Ralf Grottenmüller, Abraham Casas Garcia-Minguillan, Fumio Kita, Dieter Wagner
-
Patent number: 10385234Abstract: 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: GrantFiled: July 28, 2015Date of Patent: August 20, 2019Assignee: AZ Electronics Materials (LUXEMBOURG) S.Á.R.L.Inventors: Ralf Grottenmüller, Rosalin Karunanandan, Fumio Kita, Helmut Lenz, Dieter Wagner, Andreas Dresel
-
Publication number: 20180312641Abstract: The present invention relates to a method for producing silazane-siloxa copolymers and the use of such copolymers, particularly in LEDs.Type: ApplicationFiled: October 4, 2016Publication date: November 1, 2018Inventors: Ralf GROTTENMÜLLER, Abraham CASAS GARCIA-MINGUILLAN, Fumio KITA, Dieter WAGNER
-
Patent number: 10000665Abstract: 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: GrantFiled: February 27, 2015Date of Patent: June 19, 2018Assignee: AZ Electronic Materials (Luxembourg) S.a.r.l.Inventors: Ralf Grottenmüller, Rosalin Karunanandan, Fumio Kita, Helmut Lenz, Dieter Wagner, Andreas Dresel
-
Patent number: 9991182Abstract: 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: GrantFiled: July 16, 2014Date of Patent: June 5, 2018Assignee: AZ Electronic Materials (Luxembourg) S.A.R.L.Inventors: Ralph Grottenmüller, Rosalin Karunanandan, Fumio Kita, Helmut Lenz, Dieter Wagner
-
Publication number: 20170210944Abstract: 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: ApplicationFiled: July 28, 2015Publication date: July 27, 2017Inventors: Ralf Grottenmüller, Rosalin Karunanandan, Fumio Kita, Helmut Lenz, Dieter Wagner, Andreas Dresel
-
Publication number: 20160362580Abstract: 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: ApplicationFiled: February 27, 2015Publication date: December 15, 2016Inventors: Ralf GROTTENMÜLLER, Rosalin KARUNANANDAN, Fumio KITA, Helmut LENZ, Dieter WAGNER, Andreas DRESEL
-
Publication number: 20160172552Abstract: 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: ApplicationFiled: July 16, 2014Publication date: June 16, 2016Applicant: AZ ELECTRONIC MATERIALS (LUXEMBOURG) S.A.R.L.Inventors: Ralph GROTTENMÜLLER, Rosalin KARUNANANDAN, Fumio KITA, Helmut LENZ, Dieter WAGNER