Patents by Inventor Dae Sung Kal

Dae Sung Kal 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: 20180342653
    Abstract: A semiconductor device including a first lead electrode and a second lead electrode on a lead frame; a semiconductor stack structure disposed on the lead frame, the semiconductor stack structure including a first conductive semiconductor layer, a second conductive semiconductor layer, and an active region interposed between the first and second conductive semiconductor layers; a first electrode electrically connected to the first conductive semiconductor layer; a second electrode electrically connected to the second conductive semiconductor layer; a conductive adhesive configured to bond the semiconductor stack structure to the lead frame; and a first wavelength converter that covers at least side surfaces of the semiconductor stack structure.
    Type: Application
    Filed: July 13, 2018
    Publication date: November 29, 2018
    Inventors: Chung Hoon LEE, Dae Sung KAL, Ki Bum NAM
  • Publication number: 20170317247
    Abstract: A semiconductor device including a first lead electrode and a second lead electrode; a semiconductor stack structure disposed on the member, the semiconductor stack structure including a first conductive semiconductor layer, a second conductive semiconductor layer, and an active region interposed between the first and second conductive semiconductor layers; a first electrode electrically connected to the first conductive semiconductor layer; a second electrode electrically connected to the second conductive semiconductor layer; a plating layer configured to bond the semiconductor stack structure to the member; and a first wavelength converter that covers at least side surfaces of the semiconductor stack structure.
    Type: Application
    Filed: July 11, 2017
    Publication date: November 2, 2017
    Inventors: Chung Hoon LEE, Dae Sung KAL, Ki Bum NAM
  • Patent number: 9711693
    Abstract: A semiconductor device including a first lead electrode and a second lead electrode; a semiconductor stack structure disposed on the member, the semiconductor stack structure including a first conductive semiconductor layer, a second conductive semiconductor layer, and an active region interposed between the first and second conductive semiconductor layers; a first electrode electrically connected to the first conductive semiconductor layer; a second electrode electrically connected to the second conductive semiconductor layer; a plating layer configured to bond the semiconductor stack structure to the member; and a first wavelength converter that covers at least side surfaces of the semiconductor stack structure.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: July 18, 2017
    Inventors: Chung Hoon Lee, Dae Sung Kal, Ki Bum Nam
  • Patent number: 9203007
    Abstract: Disclosed is a light emitting diode assembly. The light emitting diode assembly comprised: a red light emitting diode chip; a short-wavelength light emitting diode chip emitting a light having a wavelength relatively shorter than that of a light emitted from the red light emitting diode chip; a first heat-dispersion member for dispersing most of the heat generated in the short wavelength light emitting diode chip; and a second heat-dispersion member for dispersing most of the heat generated in the red light emitting diode chip. Further, the second heat-dispersion member has heat dispersion performance relatively superior to that of the first heat dispersion member. Thus, spectrum movement in the red light emitted from the red light emitting diode chip may be prevented so as to prevent a color-coordinate transformation during the operation time of same.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: December 1, 2015
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Chung Hoon Lee, Dae Sung Kal, Won Cheol Seo, Young Eun Yang
  • Publication number: 20150270454
    Abstract: A semiconductor device including a first lead electrode and a second lead electrode; a semiconductor stack structure disposed on the member, the semiconductor stack structure including a first conductive semiconductor layer, a second conductive semiconductor layer, and an active region interposed between the first and second conductive semiconductor layers; a first electrode electrically connected to the first conductive semiconductor layer; a second electrode electrically connected to the second conductive semiconductor layer; a plating layer configured to bond the semiconductor stack structure to the member; and a first wavelength converter that covers at least side surfaces of the semiconductor stack structure.
    Type: Application
    Filed: June 4, 2015
    Publication date: September 24, 2015
    Inventors: Chung Hoon LEE, Dae Sung KAL, Ki Bum NAM
  • Patent number: 9070851
    Abstract: Exemplary embodiments of the present invention provide a wafer-level light emitting diode (LED) package and a method of fabricating the same. The LED package includes a semiconductor stack including a first conductive type semiconductor layer, an active layer, and a second conductive type semiconductor layer; a plurality of contact holes arranged in the second conductive type semiconductor layer and the active layer, the contact holes exposing the first conductive type semiconductor layer; a first bump arranged on a first side of the semiconductor stack, the first bump being electrically connected to the first conductive type semiconductor layer via the plurality of contact holes; a second bump arranged on the first side of the semiconductor stack, the second bump being electrically connected to the second conductive type semiconductor layer; and a protective insulation layer covering a sidewall of the semiconductor stack.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: June 30, 2015
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Won Cheol Seo, Dae Sung Kal
  • Patent number: 9054231
    Abstract: A method of fabricating a semiconductor device using gang bonding and a semiconductor device fabricated by the same, the method comprising preparing a support substrate having a plurality of semiconductor stack structures aligned on a top thereof. Each of the semiconductor stack structures comprises a first conductive semiconductor layer, a second conductive semiconductor layer and an active region interposed between the first and second conductive semiconductor layers. A member having first lead electrodes and second lead electrodes is prepared to correspond to the plurality of semiconductor stack structures. Then, the semiconductor stack structures are bonded to the member while maintaining the semiconductor stack structures on the support substrate. After the semiconductor stack structures are bonded to the member, the member is divided.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: June 9, 2015
    Inventors: Chung Hoon Lee, Dae Sung Kal, Ki Bum Nam
  • Patent number: 9041037
    Abstract: An ultraviolet light emitting diode package for emitting ultraviolet light is disclosed. The ultraviolet light emitting diode package comprises an LED chip emitting light with a peak wavelength of 350 nm or less, and a protective member provided so that surroundings of the LED chip is covered to protect the LED chip, the protective member having a non-yellowing property to energy from the LED chip.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: May 26, 2015
    Assignee: Seoul Viosys Co., Ltd.
    Inventors: Jeong Suk Bae, Jae Jo Kim, Do Hyung Kim, Dae Sung Kal
  • Publication number: 20150034979
    Abstract: Disclosed is a light emitting diode assembly. The light emitting diode assembly comprised: a red light emitting diode chip; a short-wavelength light emitting diode chip emitting a light having a wavelength relatively shorter than that of a light emitted from the red light emitting diode chip; a first heat-dispersion member for dispersing most of the heat generated in the short wavelength light emitting diode chip; and a second heat-dispersion member for dispersing most of the heat generated in the red light emitting diode chip. Further, the second heat-dispersion member has heat dispersion performance relatively superior to that of the first heat dispersion member. Thus, spectrum movement in the red light emitted from the red light emitting diode chip may be prevented so as to prevent a color-coordinate transformation during the operation time of same.
    Type: Application
    Filed: May 25, 2012
    Publication date: February 5, 2015
    Applicant: Seoul Semiconductor Co., Ltd.
    Inventors: Chung Hoon Lee, Dae Sung Kal, Won Cheol Seo, Young Eun Yang
  • Patent number: 8937327
    Abstract: A light emitting device having a plurality of light emitting cells is disclosed.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: January 20, 2015
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Won Cheol Seo, Dae Sung Kal, Joon Hee Lee, Chang Youn Kim
  • Patent number: 8872419
    Abstract: The disclosed light emitting device comprises at least one first light emitting element including at least one light emitting chip for emitting light having a wavelength of 400 to 500 nm and a phosphor; and at least one second light emitting element disposed adjacent to the first light emitting element to emit light having a wavelength of 560 to 880 nm.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: October 28, 2014
    Assignee: Seoul Viosys Co., Ltd.
    Inventors: Dae Won Kim, Do Hyung Kim, Dae Sung Kal, In Kyu Park
  • Patent number: 8810124
    Abstract: Disclosed are an AC light emitting device with a long-persistent phosphor and an AC light emitting device module having the same. According to an exemplary embodiment of the present invention, the light emitting device includes a first light emitting diode chip and a second light emitting diode chip, each of which has a plurality of light emitting cells on a single substrate. Further, a first long-persistent phosphor is positioned on the first light emitting diode chip to perform wavelength conversion for a portion of light emitted from the first light emitting diode chip; and a second long-persistent phosphor is positioned on the second light emitting diode chip to perform wavelength conversion for a portion of light emitted from the second light emitting diode chip. The afterglow luminescence resulted from the second long-persistent phosphor is allowed to be different from that resulted from the first long-persistent phosphor, whereby a flicker effect of the AC light emitting device can be more alleviated.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: August 19, 2014
    Assignee: Seoul Viosys Co., Ltd.
    Inventors: Chung Hoon Lee, Yeo Jin Yoon, Dae Won Kim, Dae Sung Kal, Kyung Hee Ye
  • Publication number: 20140061706
    Abstract: An ultraviolet light emitting diode package for emitting ultraviolet light is disclosed. The ultraviolet light emitting diode package comprises an LED chip emitting light with a peak wavelength of 350 nm or less, and a protective member provided so that surroundings of the LED chip is covered to protect the LED chip, the protective member having a non-yellowing property to energy from the LED chip.
    Type: Application
    Filed: October 25, 2013
    Publication date: March 6, 2014
    Applicant: Seoul Viosys Co., Ltd.
    Inventors: Jeong Suk BAE, Jae Jo KIM, Do Hyung KIM, Dae Sung KAL
  • Patent number: 8648380
    Abstract: The present invention relates to a light emitting device having a plurality of non-polar light emitting cells and a method of fabricating the same. Nitride semiconductor layers are disposed on a Gallium Nitride substrate having an upper surface. The upper surface is a non-polar or semi-polar crystal and forms an intersection angle with respect to a c-plane. The nitride semiconductor layers may be patterned to form light emitting cells separated from one another. When patterning the light emitting cells, the substrate may be partially removed in separation regions between the light emitting cells to form recess regions. The recess regions are filled with an insulating layer, and the substrate is at least partially removed by using the insulating layer.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: February 11, 2014
    Assignee: Seoul Opto Device Co., Ltd.
    Inventors: Kwang Choong Kim, Won Cheol Seol, Dae Won Kim, Dae Sung Kal, Kyung Hee Ye
  • Patent number: 8598775
    Abstract: The disclosed light emitting device comprises at least one first light emitting element including at least one light emitting chip for emitting light having a wavelength of 400 to 500 nm and a phosphor; and at least one second light emitting element disposed adjacent to the first light emitting element to emit light having a wavelength of 560 to 880 nm.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: December 3, 2013
    Assignee: Seoul Opto Device Co., Ltd.
    Inventors: Dae Won Kim, Do Hyung Kim, Dae Sung Kal, In Kyu Park
  • Patent number: 8575637
    Abstract: An ultraviolet light emitting diode package for emitting ultraviolet light is disclosed. The ultraviolet light emitting diode package comprises an LED chip emitting light with a peak wavelength of 350 nm or less, and a protective member provided so that surroundings of the LED chip is covered to protect the LED chip, the protective member having a non-yellowing property to energy from the LED chip.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: November 5, 2013
    Assignee: Seoul Opto Device Co., Ltd.
    Inventors: Jeong Suk Bae, Jae Jo Kim, Do Hyung Kim, Dae Sung Kal
  • Patent number: 8575594
    Abstract: A light emitting diode (LED) for minimizing crystal defects in an active region and enhancing recombination efficiency of electrons and holes in the active region includes non-polar GaN-based semiconductor layers grown on a non-polar substrate. The semiconductor layers include a non-polar N-type semiconductor layer, a non-polar P-type semiconductor layer, and non-polar active region layers positioned between the N-type semiconductor layer and the P-type semiconductor layer. The non-polar active region layers include a well layer and a barrier layer with a superlattice structure.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: November 5, 2013
    Assignee: Seoul Opto Device Co., Ltd.
    Inventors: Chung Hoon Lee, Ki Bum Nam, Dae Sung Kal
  • Publication number: 20130264600
    Abstract: A method of fabricating a semiconductor device using gang bonding and a semiconductor device fabricated by the same, the method comprising preparing a support substrate having a plurality of semiconductor stack structures aligned on a top thereof. Each of the semiconductor stack structures comprises a first conductive semiconductor layer, a second conductive semiconductor layer and an active region interposed between the first and second conductive semiconductor layers. A member having first lead electrodes and second lead electrodes is prepared to correspond to the plurality of semiconductor stack structures. Then, the semiconductor stack structures are bonded to the member while maintaining the semiconductor stack structures on the support substrate. After the semiconductor stack structures are bonded to the member, the member is divided.
    Type: Application
    Filed: June 30, 2011
    Publication date: October 10, 2013
    Inventors: Chung Hoon Lee, Dae Sung Kal, Ki Bum Nam
  • Publication number: 20130228793
    Abstract: The present invention relates to a light emitting device having a plurality of non-polar light emitting cells and a method of fabricating the same. Nitride semiconductor layers are disposed on a Gallium Nitride substrate having an upper surface. The upper surface is a non-polar or semi-polar crystal and forms an intersection angle with respect to a c-plane. The nitride semiconductor layers may be patterned to form light emitting cells separated from one another. When patterning the light emitting cells, the substrate may be partially removed in separation regions between the light emitting cells to form recess regions. The recess regions are filled with an insulating layer, and the substrate is at least partially removed by using the insulating layer.
    Type: Application
    Filed: April 18, 2013
    Publication date: September 5, 2013
    Applicant: Seoul Opto Device Co., Ltd.
    Inventors: Kwang Choong KIM, Won Cheol Seo, Dae Won Kim, Dae Sung Kal, Kyung Hee Ye
  • Patent number: 8525220
    Abstract: Disclosed is a light emitting diode (LED) with an improved structure. The LED comprises an N-type semiconductor layer, a P-type semiconductor layer and an active layer interposed between the N-type and P-type semiconductor layers. The P-type compound semiconductor layer has a laminated structure comprising a P-type clad layer positioned on the active layer, a hole injection layer positioned on the P-type clad layer, and a P-type contact layer positioned on the hole injection layer. Accordingly, holes are more smoothly injected into the active layer from the P-type semiconductor layer, thereby improving the recombination rate of electrons and holes.
    Type: Grant
    Filed: June 23, 2008
    Date of Patent: September 3, 2013
    Assignee: Seoul Opto Device Co., Ltd.
    Inventors: Sang Joon Lee, Dae Sung Kal, Dae Won Kim