Patents by Inventor Doo Go Baik
Doo Go Baik 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: 8198114Abstract: A vertical nitride-based semiconductor LED comprises a structure support layer; a p-electrode formed on the structure support layer; a p-type nitride semiconductor layer formed on the p-electrode; an active layer formed on the p-type nitride semiconductor layer; an n-type nitride semiconductor layer formed on the active layer; an n-electrode formed on a portion of the n-type nitride semiconductor layer; and a buffer layer formed on a region of the n-type nitride semiconductor layer on which the n-electrode is not formed, the buffer layer having irregularities formed thereon. The surface of the n-type nitride semiconductor layer coming in contact with the n-electrode is flat.Type: GrantFiled: October 21, 2010Date of Patent: June 12, 2012Assignee: Samsung LED Co., Ltd.Inventors: Sang Ho Yoon, Su Yeol Lee, Doo Go Baik, Seok Beom Choi, Tae Sung Jang, Jong Gun Woo
-
Patent number: 8178378Abstract: A vertical nitride-based semiconductor LED comprises a structure support layer; a p-electrode formed on the structure support layer; a p-type nitride semiconductor layer formed on the p-electrode; an active layer formed on the p-type nitride semiconductor layer; an n-type nitride semiconductor layer formed on the active layer; an n-electrode formed on a portion of the n-type nitride semiconductor layer; and a buffer layer formed on a region of the n-type nitride semiconductor layer on which the n-electrode is not formed, the buffer layer having irregularities formed thereon. The surface of the n-type nitride semiconductor layer coming in contact with the n-electrode is flat.Type: GrantFiled: October 21, 2010Date of Patent: May 15, 2012Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Sang Ho Yoon, Su Yeol Lee, Doo Go Baik, Seok Beom Choi, Tae Sung Jang, Jong Gun Woo
-
Patent number: 8168454Abstract: Provided is a vertical LED including an n-electrode; an n-type GaN layer formed under the n-electrode, the n-type GaN layer having a surface coming in contact with the n-electrode, the surface having a Ga+N layer containing a larger amount of Ga than that of N; an active layer formed under the n-type GaN layer; a p-type GaN layer formed under the active layer; a p-electrode formed under the p-type GaN layer; and a structure support layer formed under the p-electrode.Type: GrantFiled: May 14, 2009Date of Patent: May 1, 2012Assignee: Samsung LED Co., Ltd.Inventors: Su Yeol Lee, Sang Ho Yoon, Doo Go Baik, Seok Beom Choi, Tae Sung Jang, Jong Gun Woo
-
Patent number: 8115220Abstract: Provided is a vertical LED including an n-electrode; an n-type GaN layer formed under the n-electrode, the n-type GaN layer having a surface coming in contact with the n-electrode, the surface having a Ga+N layer containing a larger amount of Ga than that of N; an active layer formed under the n-type GaN layer; a p-type GaN layer formed under the active layer; a p-electrode formed under the p-type GaN layer; and a structure support layer formed under the p-electrode.Type: GrantFiled: August 14, 2007Date of Patent: February 14, 2012Assignee: Samsung LED Co., Ltd.Inventors: Su Yeol Lee, Sang Ho Yoon, Doo Go Baik, Seok Beom Choi, Tae Sung Jang, Jong Gun Woo
-
Patent number: 8012779Abstract: A vertical GaN-based LED comprises an n-electrode; an n-type GaN layer formed under the n-electrode, the n-type GaN layer having an irregular-surface structure which includes a first irregular-surface structure having irregularities formed at even intervals and a second irregular-surface structure having irregularities formed at uneven intervals, the second irregular-surface structure being formed on the first irregular-surface structure; an active layer formed under the n-type GaN layer; a p-type GaN layer formed under the active layer; a p-electrode formed under the p-type GaN layer; and a structure support layer formed under the p-electrode.Type: GrantFiled: July 24, 2007Date of Patent: September 6, 2011Assignee: Samsung LED Co., Ltd.Inventors: Seok Beom Choi, Bang Won Oh, Jong Gun Woo, Doo Go Baik
-
Patent number: 7906785Abstract: A vertical nitride semiconductor light emitting device and a manufacturing method thereof are provided. In the device, an ohmic contact layer, a p-type nitride semiconductor layer, an active layer, an n-type nitride semiconductor layer and an n-electrode are sequentially formed on a conductive substrate. At least one of a surface of the p-type nitride semiconductor layer contacting the ohmic contact layer and a surface of the n-type nitride layer contacting the n-electrode has a high resistance area of damaged nitride single crystal in a substantially central portion thereof. The high resistance area has a Schottky junction with at least one of the ohmic contact layer and the n-electrode.Type: GrantFiled: October 24, 2006Date of Patent: March 15, 2011Assignee: Samsung LED Co., Ltd.Inventors: Doo Go Baik, Bang Won Oh, Tae Jun Kim
-
Publication number: 20110053298Abstract: A vertical nitride-based semiconductor LED comprises a structure support layer; a p-electrode formed on the structure support layer; a p-type nitride semiconductor layer formed on the p-electrode; an active layer formed on the p-type nitride semiconductor layer; an n-type nitride semiconductor layer formed on the active layer; an n-electrode formed on a portion of the n-type nitride semiconductor layer; and a buffer layer formed on a region of the n-type nitride semiconductor layer on which the n-electrode is not formed, the buffer layer having irregularities formed thereon. The surface of the n-type nitride semiconductor layer coming in contact with the n-electrode is flat.Type: ApplicationFiled: October 21, 2010Publication date: March 3, 2011Applicant: SAMSUNG LED CO., LTD.Inventors: Sang Ho YOON, Su Yeol LEE, Doo Go BAIK, Seok Beom CHOI, Tae Sung JANG, Jong Gun WOO
-
Publication number: 20110033965Abstract: A vertical nitride-based semiconductor LED comprises a structure support layer; a p-electrode formed on the structure support layer; a p-type nitride semiconductor layer formed on the p-electrode; an active layer formed on the p-type nitride semiconductor layer; an n-type nitride semiconductor layer formed on the active layer; an n-electrode formed on a portion of the n-type nitride semiconductor layer; and a buffer layer formed on a region of the n-type nitride semiconductor layer on which the n-electrode is not formed, the buffer layer having irregularities formed thereon. The surface of the n-type nitride semiconductor layer coming in contact with the n-electrode is flat.Type: ApplicationFiled: October 21, 2010Publication date: February 10, 2011Applicant: SAMSUNG LED CO., LTD.Inventors: Sang Ho YOON, Su Yeol LEE, Doo Go BAIK, Seok Beom CHOI, Tae Sung JANG, Jong Gun WOO
-
Patent number: 7872276Abstract: A method of manufacturing a vertical GaN-based LED comprises forming a light emission structure in which an n-type GaN-based semiconductor layer, an active layer, and a p-type GaN-based semiconductor layer are sequentially laminated on a substrate; etching the light emission structure such that the light emission structure is divided into units of LED; forming a p-electrode on each of the divided light emission structures; filling a non-conductive material between the divided light emission structures; forming a metal seed layer on the resulting structure; forming a first plated layer on the metal seed layer excluding a region between the light emission structures; forming a second plated layer on the metal seed layer between the first plated layers; separating the substrate from the light emission structures; removing the non-conductive material between the light emission structures exposed by separating the substrate; forming an n-electrode on the n-type GaN-based semiconductor layer; and removing portionsType: GrantFiled: May 1, 2007Date of Patent: January 18, 2011Assignee: Samsung LED Co., Ltd.Inventors: Su Yeol Lee, Bang Won Oh, Doo Go Baik, Tae Sung Jang, Jong Gun Woo, Seok Beom Choi, Sang Ho Yoon, Dong Woo Kim, In Tae Yeo
-
Patent number: 7838317Abstract: A vertical nitride-based semiconductor LED comprises a structure support layer; a p-electrode formed on the structure support layer; a p-type nitride semiconductor layer formed on the p-electrode; an active layer formed on the p-type nitride semiconductor layer; an n-type nitride semiconductor layer formed on the active layer; an n-electrode formed on a portion of the n-type nitride semiconductor layer; and a buffer layer formed on a region of the n-type nitride semiconductor layer on which the n-electrode is not formed, the buffer layer having irregularities formed thereon. The surface of the n-type nitride semiconductor layer coming in contact with the n-electrode is flat.Type: GrantFiled: August 20, 2009Date of Patent: November 23, 2010Assignee: Samsung LED Co., Ltd.Inventors: Sang Ho Yoon, Su Yeol Lee, Doo Go Baik, Seok Beom Choi, Tae Sung Jang, Jong Gun Woo
-
Patent number: 7695989Abstract: A vertical GaN-based LED and a method of manufacturing the same are provided. The vertical GaN-based LED can prevent the damage of an n-type GaN layer contacting an n-type electrode, thereby stably securing the contact resistance of the n-electrode. The vertical GaN-based LED includes: a support layer; a p-electrode formed on the support layer; a p-type GaN layer formed on the p-electrode; an active layer formed on the p-type GaN layer; an n-type GaN layer for an n-type electrode contact, formed on the active layer; an etch stop layer formed on the n-type GaN layer to expose a portion of the n-type GaN layer; and an n-electrode formed on the n-type GaN layer exposed by the etch stop layer.Type: GrantFiled: March 18, 2009Date of Patent: April 13, 2010Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Doo Go Baik, Bang Won Oh, Seok Beom Choi, Su Yeol Lee
-
Patent number: 7687818Abstract: There is provided a semiconductor light emitting device having excellent light extraction efficiency to efficiently reflect light moving into the device by increasing the total reflectivity of a reflective layer. A semiconductor light emitting device according to an aspect of the invention includes: a substrate, a reflective electrode, a first conductivity semiconductor layer, an active layer, and a second conductivity type semiconductor layer that are sequentially stacked.Type: GrantFiled: July 22, 2008Date of Patent: March 30, 2010Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Sang Ho Yoon, Su Yeol Lee, Doo Go Baik, Seok Beom Choi, Tae Sung Jang, Jong Gun Woo
-
Publication number: 20090311817Abstract: A vertical nitride-based semiconductor LED comprises a structure support layer; a p-electrode formed on the structure support layer; a p-type nitride semiconductor layer formed on the p-electrode; an active layer formed on the p-type nitride semiconductor layer; an n-type nitride semiconductor layer formed on the active layer; an n-electrode formed on a portion of the n-type nitride semiconductor layer; and a buffer layer formed on a region of the n-type nitride semiconductor layer on which the n-electrode is not formed, the buffer layer having irregularities formed thereon. The surface of the n-type nitride semiconductor layer coming in contact with the n-electrode is flat.Type: ApplicationFiled: August 20, 2009Publication date: December 17, 2009Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Sang Ho YOON, Su Yeol Lee, Doo Go Baik, Seok Beom Choi, Tae Sung Jang, Jong Gun Woo
-
Publication number: 20090221110Abstract: Provided is a vertical LED including an n-electrode; an n-type GaN layer formed under the n-electrode, the n-type GaN layer having a surface coming in contact with the n-electrode, the surface having a Ga+N layer containing a larger amount of Ga than that of N; an active layer formed under the n-type GaN layer; a p-type GaN layer formed under the active layer; a p-electrode formed under the p-type GaN layer; and a structure support layer formed under the p-electrode.Type: ApplicationFiled: May 14, 2009Publication date: September 3, 2009Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Su Yeol LEE, Sang Ho Yoon, Doo Go Baik, Seok Beom Choi, Tae Sung Jang, Jong Gun Woo
-
Patent number: 7573076Abstract: A vertical GaN-based LED and a method of manufacturing the same are provided. The vertical GaN-based LED can prevent the damage of an n-type GaN layer contacting an n-type electrode, thereby stably securing the contact resistance of the n-electrode. The vertical GaN-based LED includes: a support layer; a p-electrode formed on the support layer; a p-type GaN layer formed on the p-electrode; an active layer formed on the p-type GaN layer; an n-type GaN layer for an n-type electrode contact, formed on the active layer; an etch stop layer formed on the n-type GaN layer to expose a portion of the n-type GaN layer; and an n-electrode formed on the n-type GaN layer exposed by the etch stop layer.Type: GrantFiled: December 6, 2006Date of Patent: August 11, 2009Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Doo Go Baik, Bang Won Oh, Seok Beom Choi, Su Yeol Lee
-
Publication number: 20090181485Abstract: A vertical GaN-based LED and a method of manufacturing the same are provided. The vertical GaN-based LED can prevent the damage of an n-type GaN layer contacting an n-type electrode, thereby stably securing the contact resistance of the n-electrode. The vertical GaN-based LED includes: a support layer; a p-electrode formed on the support layer; a p-type GaN layer formed on the p-electrode; an active layer formed on the p-type GaN layer; an n-type GaN layer for an n-type electrode contact, formed on the active layer; an etch stop layer formed on the n-type GaN layer to expose a portion of the n-type GaN layer; and an n-electrode formed on the n-type GaN layer exposed by the etch stop layer.Type: ApplicationFiled: March 18, 2009Publication date: July 16, 2009Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Doo Go BAIK, Bang Won Oh, Seok Beom Choi, Su Yeo Lee
-
Patent number: 7553682Abstract: According to a method of manufacturing a vertical nitride light emitting device, a first conductivity type nitride layer, an active layer and a second conductivity type nitride layer are sequentially grown on a preliminary growth substrate to form a light emission structure. The light emission structure is cut according to a final size of light emitting devices, leaving a predetermined thickness of the first conductivity type nitride layer intact. A permanent conductive substrate is provided on the light emission structure and the preliminary substrate is diced into a plurality of units. Laser beam is irradiated to detach the preliminary substrate, thereby separating the light emission structure according to the size of the light emitting devices. First and second contacts are formed on the first conductivity type nitride layer and the permanent conductive substrate, respectively. The permanent conductive substrate is diced to complete individual light emitting devices.Type: GrantFiled: October 23, 2006Date of Patent: June 30, 2009Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Doo Go Baik, Bang Won Oh, Nam Seung Kim
-
Publication number: 20090026478Abstract: There is provided a semiconductor light emitting device having excellent light extraction efficiency to efficiently reflect light moving into the device by increasing the total reflectivity of a reflective layer. A semiconductor light emitting device according to an aspect of the invention includes: a substrate, a reflective electrode, a first conductivity semiconductor layer, an active layer, and a second conductivity type semiconductor layer that are sequentially stacked.Type: ApplicationFiled: July 22, 2008Publication date: January 29, 2009Inventors: Sang Ho YOON, Su Yeol Lee, Doo Go Baik, Seok Beom Choi, Tae Sung Jang, Jong Gun Woo
-
Publication number: 20080093618Abstract: Provided is a vertical LED including an n-electrode; an n-type GaN layer formed under the n-electrode, the n-type GaN layer having a surface coming in contact with the n-electrode, the surface having a Ga+N layer containing a larger amount of Ga than that of N; an active layer formed under the n-type GaN layer; a p-type GaN layer formed under the active layer; a p-electrode formed under the p-type GaN layer; and a structure support layer formed under the p-electrode.Type: ApplicationFiled: August 14, 2007Publication date: April 24, 2008Inventors: Su Yeol Lee, Sang Ho Yoon, Doo Go Baik, Seok Beom Choi, Tae Sung Jang, Jong Gun Woo
-
Publication number: 20080048206Abstract: A method of manufacturing a vertical GaN-based LED comprises forming a light emission structure in which an n-type GaN-based semiconductor layer, an active layer, and a p-type GaN-based semiconductor layer are sequentially laminated on a substrate; etching the light emission structure such that the light emission structure is divided into units of LED; forming a p-electrode on each of the divided light emission structures; filling a non-conductive material between the divided light emission structures; forming a metal seed layer on the resulting structure; forming a first plated layer on the metal seed layer excluding a region between the light emission structures; forming a second plated layer on the metal seed layer between the first plated layers; separating the substrate from the light emission structures; removing the non-conductive material between the light emission structures exposed by separating the substrate; forming an n-electrode on the n-type GaN-based semiconductor layer; and removing portionsType: ApplicationFiled: May 1, 2007Publication date: February 28, 2008Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Su Yeol LEE, Bang Won OH, Doo Go BAIK, Tae Sung JANG, Jong Gun WOO, Seok Beom CHOI, Sang Ho YOON, Dong Woo KIM, In Tae YEO