Patents by Inventor Ji-Su Ahn

Ji-Su Ahn 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: 20240082263
    Abstract: The present invention relates to a pharmaceutical composition for combined administration of melatonin and prostaglandin E2 (PGE2) for the treatment of intestinal epithelial injury diseases, and it is confirmed that when intestinal epithelial organoids are treated in combination with melatonin and PGE2, the expression of revival stem cell markers increases more than when the two substances are treated alone, and therefore it can be usefully used as a composition for preventing, treating or improving intestinal epithelial injury diseases.
    Type: Application
    Filed: May 7, 2023
    Publication date: March 14, 2024
    Applicant: PUSAN NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION
    Inventors: Hyung-Sik KIM, Yoo Jin SEO, Ji-Su AHN
  • Publication number: 20140363936
    Abstract: A thin film transistor (TFT) and an organic light emitting diode (OLED) display device. The TFT and the OLED display device include a substrate, a buffer layer disposed on the substrate, a semiconductor layer disposed on the buffer layer, a gate electrode insulated from the semiconductor layer, a gate insulating layer insulating the semiconductor layer from the gate electrode, and source and drain electrodes insulated from the gate electrode and partially connected to the semiconductor layer, wherein the semiconductor layer is formed from a polycrystalline silicon layer crystallized by a metal catalyst and the metal catalyst is removed by gettering using an etchant. In addition, the OLED display device includes an insulating layer disposed on the entire surface of the substrate, a first electrode disposed on the insulating layer and electrically connected to one of the source and drain electrodes, an organic layer, and a second electrode.
    Type: Application
    Filed: June 12, 2014
    Publication date: December 11, 2014
    Inventors: Byoung-Keon Park, Tae-Hoon Yang, Jin-Wook Seo, Ki-Yong Lee, Maxim Lisachenko, Bo-Kyung Choi, Dae-Woo Lee, Kil-Won Lee, Dong-Hyun Lee, Jong-Ryuk Park, Ji-Su Ahn, Young-Dae Kim, Heung-Yeol Na, Min-Jae Jeong, Yun-Mo Chung, Jong-Won Hong, Eu-Gene Kang, Seok-RaK Chang, Jae-Wan Jung, Sang-Yon Yoon
  • Patent number: 8871616
    Abstract: A thin film transistor (TFT), an OLED device having the TFT and a method of fabricating the same and a method of fabricating an organic light emitting diode (OLED) display device that includes the TFT. The method of fabricating a TFT includes providing a substrate, forming a buffer layer on the substrate, forming an amorphous silicon layer pattern on the buffer layer, forming a metal layer on an entire surface of the substrate, forming a semiconductor layer by applying an electrical field to the metal layer to crystallize the amorphous silicon layer pattern, forming source and drain electrodes connected to the semiconductor layer by patterning the metal layer, forming a gate insulating layer on the entire surface of the substrate, forming a gate electrode on the gate insulating layer to correspond to the semiconductor layer and forming a protective layer on the entire surface of the substrate.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: October 28, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji-Su Ahn, Won-Pil Lee
  • Patent number: 8546248
    Abstract: A method of forming a polycrystalline silicon layer and an atomic layer deposition apparatus used for the same. The method includes forming an amorphous silicon layer on a substrate, exposing the substrate having the amorphous silicon layer to a hydrophilic or hydrophobic gas atmosphere, placing a mask having at least one open and at least one closed portion over the amorphous silicon layer, irradiating UV light toward the amorphous silicon layer and the mask using a UV lamp, depositing a crystallization-inducing metal on the amorphous silicon layer, and annealing the substrate to crystallize the amorphous silicon layer into a polycrystalline silicon layer. This method and apparatus provide for controlling the seed position and grain size in the formation of a polycrystalline silicon layer.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: October 1, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yun-Mo Chung, Ki-Yong Lee, Min-Jae Jeong, Jin-Wook Seo, Jong-Won Hong, Heung-Yeol Na, Eu-Gene Kang, Seok-Rak Chang, Tae-Hoon Yang, Ji-Su Ahn, Young-Dae Kim, Byoung-Keon Park, Kil-Won Lee, Dong-Hyun Lee, Sang-Yon Yoon, Jong-Ryuk Park, Bo-Kyung Choi, Maxim Lisachenko
  • Patent number: 8519405
    Abstract: The present invention relates generally to a thin film transistor, an organic light emitting diode (OLED) display including the same, and manufacturing methods of them. The thin film transistor comprises: a substrate; a gate electrode disposed on the substrate; a gate insulating layer disposed on the gate electrode; a semiconductor layer disposed on the gate insulating layer; an inter layer dielectric disposed on the entire surface of the substrate; and source and drain electrodes disposed on the inter layer dielectric and connected to the semiconductor layer, and in which the gate electrode is disposed so as to correspond to the entire surface of the semiconductor layer, and a manufacturing method thereof.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: August 27, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji-Su Ahn, Kwang-Nam Kim, Jae-Yong Lee, Beong-Ju Kim, In-Young Jung
  • Patent number: 8486195
    Abstract: An atomic layer deposition apparatus includes a chamber, a vacuum pump to control a pressure in the chamber, a gas supply unit to supply a reaction gas into the chamber, a substrate holder disposed between the vacuum pump and the gas supply unit and having a heater, a mask assembly disposed between the substrate holder and the gas supply unit and having a cooling path to move coolant, and a coolant source to supply the coolant into the cooling path. The mask assembly is positioned a first distance from a substrate, and coolant is supplied into the cooling path of the mask assembly. The substrate is heated using the heater of the substrate holder, a pressure of the chamber is controlled using the vacuum pump, and reaction gasses are sequentially supplied through the gas supply unit.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: July 16, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Heung-Yeol Na, Ki-Yong Lee, Min-Jae Jeong, Jong-Won Hong, Yun-Mo Chung, Eu-Gene Kang, Seok-Rak Chang, Jin-Wook Seo, Ji-Su Ahn, Tae-Hoon Yang, Young-Dae Kim, Byoung-Keon Park, Dong-Hyun Lee, Kil-Won Lee, Jae-Wan Jung, Jong-Ryuk Park, Bo-Kyung Choi, Sang-Hyun Yun
  • Patent number: 8420513
    Abstract: A thin film transistor (TFT), including a crystalline semiconductor pattern on a substrate, a gate insulating layer on the crystalline semiconductor pattern, the gate insulating layer having two first source/drain contact holes and a semiconductor pattern access hole therein, a gate electrode on the gate insulating layer, the gate electrode being between the two first source/drain contact holes, an interlayer insulating layer covering the gate electrode, the interlayer insulating layer having two second source/drain contact holes therein, and source and drain electrodes on the interlayer insulating layer, each of the source and drain electrodes being insulated from the gate electrode, and having a portion connected to the crystalline semiconductor pattern through the first and second source/drain contact holes.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: April 16, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji-Su Ahn, Eui-Hoon Hwang, Cheol-Ho Yu, Kwang-Nam Kim, Sung-Chul Kim
  • Patent number: 8404529
    Abstract: A thin film transistor for an organic light emitting diode includes a substrate including a pixel portion and an interconnection portion, a buffer layer on the substrate, a gate electrode and a gate interconnection on the buffer layer, wherein the gate electrode is located at the pixel portion and the gate interconnection is located at the interconnection portion, a gate insulating layer on the substrate, a semiconductor layer on the gate electrode, source and drain electrodes electrically connected to the semiconductor layer, and a metal pattern on the gate interconnection.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: March 26, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji-Su Ahn, Sung-Chul Kim, Beong-Ju Kim
  • Patent number: 8405088
    Abstract: A thin film transistor includes a substrate, a buffer layer on the substrate, a semiconductor layer on the buffer layer, source and drain electrodes directly on the semiconductor layer, each of the source and drain electrodes including at least one hole therethrough, a gate insulating layer on the substrate, and a gate electrode on the gate insulating layer and corresponding to the semiconductor layer.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: March 26, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji-Su Ahn, Hoon-Kee Min
  • Patent number: 8343796
    Abstract: A method of fabricating a thin film transistor includes patterning the amorphous semiconductor layer to form an amorphous semiconductor layer pattern, forming a gate electrode corresponding to the amorphous semiconductor layer pattern on a gate insulating layer, forming an interlayer insulating layer on the entire surface of the substrate, forming a first contact hole partially exposing the amorphous semiconductor layer pattern, forming a second contact hole partially exposing the gate electrode, and forming a metal layer on the entire surface of the substrate. The method also includes applying an electrical field to the metal layer such that a semiconductor layer is formed by crystallization of the amorphous semiconductor layer pattern, and patterning the metal layer to form source and drain electrodes that are insulated from the gate electrode and that are electrically connected with the semiconductor layer through the first contact hole.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: January 1, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji-Su Ahn, Sung-Chul Kim
  • Patent number: 8278716
    Abstract: A thin film transistor, a method of fabricating the thin film transistor, and an organic light emitting diode (OLED) display device including the thin film transistor, the thin film transistor including: a substrate; a buffer layer formed on the substrate; a first semiconductor layer disposed on the buffer layer; a second semiconductor layer disposed on the first semiconductor layer, which is larger than the first semiconductor layer; a gate electrode insulated from the first semiconductor layer and the second semiconductor layer; a gate insulating layer to insulate the gate electrode from the first semiconductor layer and the second semiconductor layer; source and drain electrodes insulated from the gate electrode and connected to the second semiconductor layer; an insulating layer disposed on the source and drain electrodes, and an organic light emitting diode connected to one of the source and drain electrodes.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: October 2, 2012
    Assignee: Samsung Display Co., Ltd.
    Inventors: Byoung-Keon Park, Dong-Hyun Lee, Kil-Won Lee, Tae-Hoon Yang, Jin-Wook Seo, Ki-Yong Lee, Ji-Su Ahn, Maxim Lisachenko
  • Publication number: 20120184074
    Abstract: A thin film transistor for an organic light emitting diode includes a substrate including a pixel portion and an interconnection portion, a buffer layer on the substrate, a gate electrode and a gate interconnection on the buffer layer, wherein the gate electrode is located at the pixel portion and the gate interconnection is located at the interconnection portion, a gate insulating layer on the substrate, a semiconductor layer on the gate electrode, source and drain electrodes electrically connected to the semiconductor layer, and a metal pattern on the gate interconnection.
    Type: Application
    Filed: March 27, 2012
    Publication date: July 19, 2012
    Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.
    Inventors: Ji-Su AHN, Sung-Chul KIM, Beong-Ju KIM
  • Publication number: 20120171823
    Abstract: A thin film transistor (TFT), including a crystalline semiconductor pattern on a substrate, a gate insulating layer on the crystalline semiconductor pattern, the gate insulating layer having two first source/drain contact holes and a semiconductor pattern access hole therein, a gate electrode on the gate insulating layer, the gate electrode being between the two first source/drain contact holes, an interlayer insulating layer covering the gate electrode, the interlayer insulating layer having two second source/drain contact holes therein, and source and drain electrodes on the interlayer insulating layer, each of the source and drain electrodes being insulated from the gate electrode, and having a portion connected to the crystalline semiconductor pattern through the first and second source/drain contact holes.
    Type: Application
    Filed: March 14, 2012
    Publication date: July 5, 2012
    Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.
    Inventors: Ji-Su Ahn, Eui-Hoon Hwang, Cheol-Ho Yu, Kwang-Nam Kim, Sung-Chul Kim
  • Publication number: 20120097966
    Abstract: The present invention relates generally to a thin film transistor, an organic light emitting diode (OLED) display including the same, and manufacturing methods of them. The thin film transistor comprises: a substrate; a gate electrode disposed on the substrate; a gate insulating layer disposed on the gate electrode; a semiconductor layer disposed on the gate insulating layer; an inter layer dielectric disposed on the entire surface of the substrate; and source and drain electrodes disposed on the inter layer dielectric and connected to the semiconductor layer, and in which the gate electrode is disposed so as to correspond to the entire surface of the semiconductor layer, and a manufacturing method thereof.
    Type: Application
    Filed: May 6, 2011
    Publication date: April 26, 2012
    Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.
    Inventors: Ji-Su Ahn, Kwang-Nam Kim, Jae-Yong Lee, Beong-Ju Kim, In-Young Jung
  • Patent number: 8158984
    Abstract: A thin film transistor (TFT), including a crystalline semiconductor pattern on a substrate, a gate insulating layer on the crystalline semiconductor pattern, the gate insulating layer having two first source/drain contact holes and a semiconductor pattern access hole therein, a gate electrode on the gate insulating layer, the gate electrode being between the two first source/drain contact holes, an interlayer insulating layer covering the gate electrode, the interlayer insulating layer having two second source/drain contact holes therein, and source and drain electrodes on the interlayer insulating layer, each of the source and drain electrodes being insulated from the gate electrode, and having a portion connected to the crystalline semiconductor pattern through the first and second source/drain contact holes.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: April 17, 2012
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Ji-Su Ahn, Eui-Hoon Hwang, Cheol-Ho Yu, Kwang-Nam Kim, Sung-Chul Kim
  • Publication number: 20110300675
    Abstract: The thin film transistor for an organic light emitting diode includes a crystalline semiconductor pattern on a substrate, a gate insulating layer on the crystalline semiconductor pattern having first source and drain contact holes, a gate electrode on the gate insulating layer, the gate electrode being between the first source and drain contact holes, an interlayer insulating layer covering the gate electrode, having second source and drain contact holes, source and drain electrode in the second source and drain contact holes, insulated from the gate electrode and electrically connected to the crystalline semiconductor pattern by first and second metal patterns in the first source and drain contact holes, respectively, wherein the gate electrode, the first metal pattern in the first source contact hole and the second metal pattern in the first drain contact hole are each made of a same material.
    Type: Application
    Filed: August 9, 2011
    Publication date: December 8, 2011
    Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.
    Inventors: Ji-Su Ahn, Sung-Chul Kim
  • Publication number: 20110294267
    Abstract: A thin film transistor includes a substrate, a buffer layer on the substrate, a semiconductor layer on the buffer layer, a gate insulating layer on the semiconductor layer, a gate electrode on the gate insulating layer, an interlayer insulating layer on the entire surface of the substrate having the gate electrode, a first contact hole and a second contact hole, and source and drain electrodes on the interlayer insulating layer, insulated from the gate electrode, and having a portion connected with the semiconductor layer through the first contact hole. An organic light emitting diode display may include the thin film transistor along with a passivation layer on the entire surface of the substrate, and a first electrode, an organic layer, and a second electrode, which are on the passivation layer and electrically connected with the source and drain electrodes.
    Type: Application
    Filed: August 9, 2011
    Publication date: December 1, 2011
    Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.
    Inventors: Ji-Su Ahn, Sung-Chul Kim
  • Patent number: 8048783
    Abstract: A method of forming a polycrystalline silicon layer and an atomic layer deposition apparatus used for the same. The method includes forming an amorphous silicon layer on a substrate, exposing the substrate having the amorphous silicon layer to a hydrophilic or hydrophobic gas atmosphere, placing a mask having at least one open and at least one closed portion over the amorphous silicon layer, irradiating UV light toward the amorphous silicon layer and the mask using a UV lamp, depositing a crystallization-inducing metal on the amorphous silicon layer, and annealing the substrate to crystallize the amorphous silicon layer into a polycrystalline silicon layer. This method and apparatus provide for controlling the seed position and grain size in the formation of a polycrystalline silicon layer.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: November 1, 2011
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Yun-Mo Chung, Ki-Yong Lee, Min-Jae Jeong, Jin-Wook Seo, Jong-Won Hong, Heung-Yeol Na, Eu-Gene Kang, Seok-Rak Chang, Tae-Hoon Yang, Ji-Su Ahn, Young-Dae Kim, Byoung-Keon Park, Kil-Won Lee, Dong-Hyun Lee, Sang-Yon Yoon, Jong-Ryuk Park, Bo-Kyung Choi, Maxim Lisachenko
  • Publication number: 20110263107
    Abstract: A method of forming a polycrystalline silicon layer and an atomic layer deposition apparatus used for the same. The method includes forming an amorphous silicon layer on a substrate, exposing the substrate having the amorphous silicon layer to a hydrophilic or hydrophobic gas atmosphere, placing a mask having at least one open and at least one closed portion over the amorphous silicon layer, irradiating UV light toward the amorphous silicon layer and the mask using a UV lamp, depositing a crystallization-inducing metal on the amorphous silicon layer, and annealing the substrate to crystallize the amorphous silicon layer into a polycrystalline silicon layer. This method and apparatus provide for controlling the seed position and grain size in the formation of a polycrystalline silicon layer.
    Type: Application
    Filed: July 7, 2011
    Publication date: October 27, 2011
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventors: Yun-Mo CHUNG, Ki-Yong LEE, Min-Jae JEONG, Jin-Wook SEO, Jong-Won HONG, Heung-Yeol NA, Eu-Gene KANG, Seok-Rak CHANG, Tae-Hoon YANG, Ji-Su AHN, Young-Dae KIM, Byoung-Keon PARK, Kil-Won LEE, Dong-Hyun LEE, Sang-Yon YOON, Jong-Ryuk PARK, Bo-Kyung CHOI, Maxim LISACHENKO
  • Patent number: 7999261
    Abstract: A thin film transistor (TFT), a method of fabricating the same, and an organic light emitting diode (OLED) display device having the TFT, the TFT including a substrate, a gate electrode disposed on the substrate, a gate insulating layer disposed on the gate electrode, a semiconductor layer disposed on the gate insulating layer and crystallized using a metal catalyst, and source and drain electrodes disposed on the semiconductor layer and electrically connected to source and drain regions of the semiconductor layer. A second metal is diffused into a surface region of the semiconductor layer, to getter the metal catalyst from a channel region of the semiconductor layer. The second metal can have a lower diffusion coefficient in silicon than the metal catalyst.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: August 16, 2011
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Ji-Su Ahn, Byoung-Keon Park, Tae-Hoon Yang, Jin-Wook Seo, Kil-Won Lee, Ki-Yong Lee, Sung-Chul Kim