Patents by Inventor Nam-Goo Cha

Nam-Goo Cha 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: 9461205
    Abstract: A nanostructure semiconductor light emitting device includes a base layer, an insulating layer and a plurality of light emitting nanostructures. The base layer is formed of a first conductivity type semiconductor. The insulating layer is disposed on the base layer and has a plurality of openings through which regions of the base layer are exposed. Each of the light emitting nanostructures is disposed on the exposed regions of the base layer and includes nanocore formed of a first conductivity type semiconductor, and an active layer and a second conductivity-type semiconductor layer sequentially disposed on side surfaces of the nanocore. Upper surfaces of the light emitting nanostructures are non-planar and contain portions free of the second conductivity-type semiconductor layer in order to prevent light emissions during device driving.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: October 4, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Nam Goo Cha, Hyun Seong Kum, Ju Bin Seo, Dong Hoon Lee
  • Patent number: 9425355
    Abstract: A semiconductor light emitting device including a first conductive semiconductor base layer on a substrate; an insulating layer on the first conductive semiconductor base layer, the insulating layer including a plurality of openings through which the first conductive semiconductor base layer is exposed; and a plurality of nanoscale light emitting structures on the first conductive semiconductor base layer, the nanoscale light emitting structures respectively including a first conductive semiconductor core on an exposed region of the first conductive semiconductor base layer, and an active layer, and a second conductive semiconductor layer sequentially disposed on a surface of the first conductive semiconductor core, wherein a lower edge of a side portion of each nanoscale light emitting structure is on an inner side wall of the opening in the insulating layer.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: August 23, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung Ho Yoo, Han Kyu Seong, Nam Goo Cha, Tae Woong Kim
  • Patent number: 9419176
    Abstract: A three-dimensional (3D) light-emitting device may include a plurality of 3D light-emitting structures formed apart from one another, each 3D light-emitting structure including: a semiconductor core vertically grown on one surface and doped in a first conductive type; an active layer formed so as to surround a surface of the semiconductor core; and a first semiconductor layer formed so as to surround a surface of the active layer and doped in a second conductive type. The 3D light-emitting device may include: a first porous insulating layer formed between lower corner portions of the 3D light-emitting structures so as to expose upper end portions of the 3D light-emitting structures; a first electrode electrically connected to the first semiconductor layer; and a second electrode electrically connected to the semiconductor core.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: August 16, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung-wook Hwang, Han-kyu Seong, Hun-jae Chung, Nam-goo Cha
  • Patent number: 9385266
    Abstract: A nanostructure semiconductor light emitting device includes a base layer, an insulating layer, and a plurality of light emitting nanostructures. The base layer includes a first conductivity type semiconductor. The insulating layer is disposed on the base layer and has a plurality of openings through which regions of the base layer are exposed. The light emitting nanostructures are respectively disposed on the exposed regions of the base layer and include a plurality of nanocores having a first conductivity type semiconductor and having side surfaces provided as the same crystal planes. The light emitting nanostructures include an active layer and a second conductivity type semiconductor layer sequentially disposed on surfaces of the nanocores. Upper surfaces of the nanocores are provided as portions of upper surfaces of the light emitting nanostructures, and the upper surfaces of the light emitting nanostructures are substantially planar with each other.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: July 5, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Nam Goo Cha, Dong Ho Kim, Geon Wook Yoo
  • Patent number: 9379283
    Abstract: A method of manufacturing a nanostructure semiconductor light emitting device including providing a base layer formed of a first conductivity type semiconductor. A mask including an etch stop layer is formed on the base layer. A plurality of openings are formed in the mask so as to expose regions of. A plurality of nanocores are formed by growing the first conductivity type semiconductor on the exposed regions of the base layer to fill the plurality of openings. The mask is partially removed by using the etch stop layer to expose side portions of the plurality of nanocores. An active layer and a second conductivity type semiconductor layer are sequentially grown on surfaces of the plurality of nanocores.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: June 28, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Nam Goo Cha, Geon Wook Yoo, Han Kyu Seong
  • Publication number: 20160163922
    Abstract: Provided is a nano-structured light-emitting device including: a first type semiconductor layer; a plurality of nanostructures which are formed on the first type semiconductor layer and include nanocores, and active layers and second type semiconductor layers that enclose surfaces of the nanocores; an electrode layer which encloses and covers the plurality of nanostructures; and a plurality of resistant layers which are formed on the electrode layer and respectively correspond to the plurality of nanostructures.
    Type: Application
    Filed: February 12, 2016
    Publication date: June 9, 2016
    Inventors: Geon-wook YOO, Nam-goo CHA, Dong-koog LEE, Dong-hoon LEE
  • Publication number: 20160125804
    Abstract: There is provided a display device including a plurality of pixels. Each of the plurality of pixels may include a plurality of switching devices, at least one capacitor, and a semiconductor light-emitting device. The display device may further include a driving circuit configured to apply currents to the semiconductor light-emitting device through the plurality of switching devices and at least one capacitor. The semiconductor light-emitting device may emit red light, green light, and blue light through the currents applied by the driving circuit.
    Type: Application
    Filed: August 13, 2015
    Publication date: May 5, 2016
    Inventors: Nam Goo CHA, Young Soo PARK, Sung Hyun SIM, Je Won KIM
  • Patent number: 9287445
    Abstract: A nano-structured light-emitting device includes a plurality of light-emitting nanostructures each having a resistant layer disposed thereon. The device includes a first semiconductor layer of a first conductivity type, and a plurality of nanostructures disposed on the first semiconductor layer. Each nanostructure includes a nanocore, and an active layer and a second semiconductor layer of a second conductivity type that enclose surfaces of the nanocores. An electrode layer encloses and covers the plurality of nanostructures A plurality of resistant layers are disposed on the electrode layer and each corresponds to a respective nanostructure of the plurality of nanostructures.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: March 15, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Geon-wook Yoo, Nam-goo Cha, Dong-koog Lee, Dong-hoon Lee
  • Publication number: 20160064609
    Abstract: A nanostructure semiconductor light emitting device may include a base layer having first and second regions and formed of a first conductivity-type semiconductor material; a plurality of light emitting nanostructures disposed on the base layer, each of which including a nanocore formed of a first conductivity-type semiconductor material, and an active layer and a second conductivity-type semiconductor layer sequentially disposed on the nanocore; a contact electrode disposed on the light emitting nanostructures to be connected to the second conductivity-type semiconductor layer; a first electrode connected to the base layer; and a second electrode covering a portion of the contact electrode disposed on at least one of light emitting nanostructures disposed in the second region among the plurality of light emitting nanostructures, wherein light emitting nanostructures disposed in the second region and light emitting nanostructures disposed in the first region among the plurality of light emitting nanostructure
    Type: Application
    Filed: August 28, 2015
    Publication date: March 3, 2016
    Inventors: Nam Goo CHA, Jin Bock LEE, Dong Kuk LEE, Dong Hyun CHO, Min Wook CHOI
  • Publication number: 20160035932
    Abstract: A nano-structured light-emitting device including a first semiconductor layer; a nano structure formed on the first semiconductor layer. The nano structure includes a nanocore, and an active layer and a second semiconductor layer that are formed on a surface of the nanocore, and of which the surface is planarized. A conductive layer surrounds sides of the nano structure, a first electrode is electrically connected to the first semiconductor layer and a second electrode is electrically connected to the conductive layer.
    Type: Application
    Filed: October 8, 2015
    Publication date: February 4, 2016
    Inventors: Nam-goo CHA, Dong-ho KIM, Geon-wook YOO, Dong-hoon LEE
  • Publication number: 20160020358
    Abstract: There is provided a semiconductor light emitting device 100 including a substructure 101, 120, 130 including at least one light emitting region R1 including a plurality of three-dimensional (3-D) light emitting nanostructures 140 and at least one electrode region R2, R3 including a plurality of locations CP2A, 17A, 17B, 18A, 18B wherein an arrangement of the plurality of three-dimensional (3-D) light emitting nanostructures 140 and the plurality of locations CP2A, 17A, 17B, 18A, 18B are identical.
    Type: Application
    Filed: May 28, 2015
    Publication date: January 21, 2016
    Inventors: Dong Kuk LEE, Geun Woo KO, Geon-Wook YOO, Nam Goo CHA
  • Publication number: 20160013366
    Abstract: A nanostructure semiconductor light-emitting device includes a base layer formed of a first conductivity-type semiconductor, a first material layer disposed on the base layer and including a plurality of openings, a plurality of light-emitting nanostructures, each of which extends through each of the plurality of openings and includes a nanocore formed of a first conductivity-type semiconductor, an active layer and a second conductivity-type semiconductor shell layer, sequentially disposed on the nanocore, a filling layer disposed on the first material layer, wherein the filling layer fills spaces between the plurality of light-emitting nanostructures and a portion of each of the plurality of light-emitting nanostructures is exposed by the filling layer, a second conductivity-type semiconductor extension layer disposed on the filling layer and covering the exposed portion of each of the plurality of light-emitting nanostructures, and a contact electrode layer disposed on the second conductivity-type semicondu
    Type: Application
    Filed: February 24, 2015
    Publication date: January 14, 2016
    Inventors: Kyung Wook HWANG, Jung Sung KIM, Nam Goo CHA
  • Publication number: 20160013364
    Abstract: A method of manufacturing a nanostructure semiconductor light emitting device may includes preparing a mask layer by sequentially forming a first insulating layer and a second insulating layer on a base layer configured of a first conductivity-type semiconductor, forming a plurality of openings penetrating the mask layer, growing a plurality of nanorods in the plurality of openings, removing the second insulating layer, preparing a plurality of nanocores by re-growing the plurality of nanorods, and forming nanoscale light emitting structures by sequentially growing an active layer and a second conductivity-type semiconductor layer on surfaces of the plurality of nanocores. The plurality of openings may respectively include a mold region located in the second insulating layer, and the mold region includes at least one curved portion of which an inclination of a side surface varies according to proximity to the first insulating layer.
    Type: Application
    Filed: January 28, 2015
    Publication date: January 14, 2016
    Inventors: Nam Goo CHA, Ki Hyung LEE, Wan Tae LIM, Geun Woo KO, Min Wook CHOI
  • Publication number: 20150372194
    Abstract: There is provided a nanostructure semiconductor light emitting device including a base layer formed of a first conductivity-type semiconductor, a first insulating layer disposed on the base layer and having a plurality of first openings exposing partial regions of the base layer, a plurality of nanocores disposed in the exposed regions of the base layer and formed of the first conductivity-type semiconductor, an active layer disposed on surfaces of the plurality of nanocores positioned to be higher than the first insulating layer, a second insulating layer disposed on the first insulating layer and having a plurality of second openings surrounding the plurality of nanocores and the active layer disposed on the surfaces of the plurality of nanocores, and a second conductivity-type semiconductor layer disposed on the surface of the active layer positioned to be higher than the second insulating layer.
    Type: Application
    Filed: January 28, 2014
    Publication date: December 24, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Nam-Goo CHA, Bong-Jin KUH, Han-Mei CHOI
  • Publication number: 20150372186
    Abstract: There is provided a method of manufacturing a nanostructure semiconductor light emitting device including providing a base layer formed of a first conductivity-type semiconductor, forming a mask including an etch stop layer on the base layer, forming a plurality of openings with regions of the base layer exposed therethrough, in the mask; forming a plurality of nanocores by growth of the first conductivity-type semiconductor on the exposed regions of the base layer to fill the plurality of openings, partially removing the mask using the etch stop layer to expose side portions of the plurality of nanocores, and sequentially growth of an active layer and a second conductivity-type semiconductor layer on surfaces of the plurality of nanocores.
    Type: Application
    Filed: January 28, 2014
    Publication date: December 24, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Nam-Goo CHA, Geon-Wook YOO, Han-kyu SEONG
  • Publication number: 20150372195
    Abstract: A semiconductor light emitting device includes a substrate; a base layer made of a first conductivity-type semiconductor and disposed on the substrate; a plurality of nanoscale light emitting units disposed in a region of an upper surface of the base layer and including a first conductivity-type nano-semiconductor layer protruding from the upper surface of the base layer, a nano-active layer disposed on the first conductivity-type nano-semiconductor layer, and a second conductivity-type nano-semiconductor layer disposed on the nano-active layer; and a light emitting laminate disposed in a different region of the upper surface of the base layer and having a laminated active layer.
    Type: Application
    Filed: August 28, 2015
    Publication date: December 24, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung Wook HWANG, Han Kyu SEONG, Nam Goo CHA
  • Publication number: 20150364642
    Abstract: There is provided a method for manufacturing a nanostructure semiconductor light emitting device, including: forming a mask having a plurality of openings on a base layer; growing a first conductivity-type semiconductor layer on exposed regions of the base layer such that the plurality of openings are filled, to form a plurality of nanocores; partially removing the mask such that side surfaces of the plurality of nanocores are exposed; heat-treating the plurality of nanocores after partially removing the mask; sequentially growing an active layer and a second conductivity-type semiconductor layer on surfaces of the plurality of nanocores to form a plurality of light emitting nanostructures, after the heat treatment; and planarizing upper parts of the plurality of light emitting nanostructures such that upper surfaces of the nanocores are exposed.
    Type: Application
    Filed: January 28, 2014
    Publication date: December 17, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Nam-Goo CHA, Dong-Ho KIM, Geon-Wook YOO
  • Publication number: 20150325745
    Abstract: A three-dimensional (3D) light-emitting device may include a plurality of 3D light-emitting structures formed apart from one another, each 3D light-emitting structure including: a semiconductor core vertically grown on one surface and doped in a first conductive type; an active layer formed so as to surround a surface of the semiconductor core; and a first semiconductor layer formed so as to surround a surface of the active layer and doped in a second conductive type. The 3D light-emitting device may include: a first porous insulating layer formed between lower corner portions of the 3D light-emitting structures so as to expose upper end portions of the 3D light-emitting structures; a first electrode electrically connected to the first semiconductor layer; and a second electrode electrically connected to the semiconductor core.
    Type: Application
    Filed: December 16, 2013
    Publication date: November 12, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung-wook HWANG, Han-kyu SEONG, Hun-jae CHUNG, Nam-goo CHA
  • Patent number: 9159877
    Abstract: A nano-structured light-emitting device including a first semiconductor layer; a nano structure formed on the first semiconductor layer. The nano structure includes a nanocore, and an active layer and a second semiconductor layer that are formed on a surface of the nanocore, and of which the surface is planarized. A conductive layer surrounds sides of the nano structure, a first electrode is electrically connected to the first semiconductor layer and a second electrode is electrically connected to the conductive layer.
    Type: Grant
    Filed: November 4, 2013
    Date of Patent: October 13, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Nam-goo Cha, Dong-ho Kim, Geon-wook Yoo, Dong-hoon Lee
  • Patent number: 9142721
    Abstract: A semiconductor light emitting device includes a substrate; a base layer made of a first conductivity-type semiconductor and disposed on the substrate; a plurality of nanoscale light emitting units disposed in a region of an upper surface of the base layer and including a first conductivity-type nano-semiconductor layer protruding from the upper surface of the base layer, a nano-active layer disposed on the first conductivity-type nano-semiconductor layer, and a second conductivity-type nano-semiconductor layer disposed on the nano-active layer; and a light emitting laminate disposed in a different region of the upper surface of the base layer and having a laminated active layer.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: September 22, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung Wook Hwang, Han Kyu Seong, Nam Goo Cha