Patents by Inventor Sang-jun Choi

Sang-jun Choi 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: 11031233
    Abstract: A layer stack over a substrate is etched using a photoresist pattern deposited on the layer stack as a first mask. The photoresist pattern is in-situ cured using plasma. At least a portion of the photoresist pattern can be modified by curing. In one embodiment, silicon by-products are formed on the photoresist pattern from the plasma. In another embodiment, a carbon from the plasma is embedded into the photoresist pattern. In yet another embodiment, the plasma produces an ultraviolet light to cure the photoresist pattern. The cured photoresist pattern is slimmed. The layer stack is etched using the slimmed photoresist pattern as a second mask.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: June 8, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Kyeong Tae Lee, Sang Wook Kim, Daehee Weon, Sang-jun Choi, Sreekar Bhaviripudi, Jahyong Kuh
  • Patent number: 10580657
    Abstract: Systems and methods discussed herein are directed towards processing of substrates, including forming a plurality of features in a target layer on a substrate. The formation of the plurality of features includes a main etch operation that forms the plurality of features to a first depth in the target layer. The main etch operation is followed by a phase shift sync pulsing (PSSP) operation, and these two operations are repeated iteratively to form the features to a predetermined depth. The PSSP operation includes one or more cycles of RF source power and RF bias power, this cycle deposits a protective coating in and on the features and then etches a portion of the protective coating to expose portions of the feature.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: March 3, 2020
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Chang Wook Doh, Zhibin Wang, Byungkook Kong, Sang Wook Kim, Sang-Jun Choi
  • Publication number: 20200013610
    Abstract: A layer stack over a substrate is etched using a photoresist pattern deposited on the layer stack as a first mask. The photoresist pattern is in-situ cured using plasma. At least a portion of the photoresist pattern can be modified by curing. In one embodiment, silicon by-products are formed on the photoresist pattern from the plasma. In another embodiment, a carbon from the plasma is embedded into the photoresist pattern. In yet another embodiment, the plasma produces an ultraviolet light to cure the photoresist pattern. The cured photoresist pattern is slimmed. The layer stack is etched using the slimmed photoresist pattern as a second mask.
    Type: Application
    Filed: September 19, 2019
    Publication date: January 9, 2020
    Inventors: Kyeong Tae Lee, Sang Wook Kim, Daehee Weon, Sang-jun Choi, Sreekar Bhaviripudi, Jahyong Kuh
  • Publication number: 20190371617
    Abstract: Systems and methods discussed herein are directed towards processing of substrates, including forming a plurality of features in a target layer on a substrate. The formation of the plurality of features includes a main etch operation that forms the plurality of features to a first depth in the target layer. The main etch operation is followed by a phase shift sync pulsing (PSSP) operation, and these two operations are repeated iteratively to form the features to a predetermined depth. The PSSP operation includes one or more cycles of RF source power and RF bias power, this cycle deposits a protective coating in and on the features and then etches a portion of the protective coating to expose portions of the feature.
    Type: Application
    Filed: July 9, 2019
    Publication date: December 5, 2019
    Inventors: Chang Wook DOH, Zhibin WANG, Byungkook KONG, Sang Wook KIM, Sang-Jun CHOI
  • Patent number: 10460921
    Abstract: A layer stack over a substrate is etched using a photoresist pattern deposited on the layer stack as a first mask. The photoresist pattern is in-situ cured using plasma. At least a portion of the photoresist pattern can be modified by curing. In one embodiment, silicon by-products are formed on the photoresist pattern from the plasma. In another embodiment, a carbon from the plasma is embedded into the photoresist pattern. In yet another embodiment, the plasma produces an ultraviolet light to cure the photoresist pattern. The cured photoresist pattern is slimmed. The layer stack is etched using the slimmed photoresist pattern as a second mask.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: October 29, 2019
    Assignee: Applied Materials, Inc.
    Inventors: Kyeong Tae Lee, Sang Wook Kim, Daehee Weon, Sang-jun Choi, Sreekar Bhaviripudi, Jahyong Kuh
  • Patent number: 10347500
    Abstract: Systems and methods discussed herein are directed towards processing of substrates, including forming a plurality of features in a target layer on a substrate. The formation of the plurality of features includes a main etch operation that forms the plurality of features to a first depth in the target layer. The main etch operation is followed by a phase shift sync pulsing (PSSP) operation, and these two operations are repeated iteratively to form the features to a predetermined depth. The PSSP operation includes one or more cycles of RF source power and RF bias power, this cycle deposits a protective coating in and on the features and then etches a portion of the protective coating to expose portions of the feature.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: July 9, 2019
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Chang Wook Doh, Zhibin Wang, Byungkook Kong, Sang Wook Kim, Sang-Jun Choi
  • Patent number: 9818972
    Abstract: An organic light-emitting device with a sealing layer covering a light-emitting diode, wherein the sealing layer comprises n number of sealing units, each comprising a sequential stack of an organic film and an inorganic film, wherein n is an integer of 1 or greater and a method of manufacturing the same.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: November 14, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sang-Jun Choi, Won-Duk Jung, Jeong-Lim Nam
  • Patent number: 9299783
    Abstract: A transistor includes a channel forming layer on a substrate, a gate on the channel forming layer and including an electrochemically indifferent metal, a solid electrolyte layer between the channel forming layer and the gate, the solid electrolyte layer is formed as a stack structure with the gate on the channel forming layer, an active metal layer including an electrochemically active metal capable of enabling channel switching by using an oxidation-reduction reaction of the electrochemically active metal so that the active metal layer forms a metal channel in a channel region between the channel forming layer and the solid electrolyte layer, and a source and a drain electrically connected to the active metal layer.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: March 29, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Woo-young Yang, Ki-hong Kim, Sang-jun Choi, Young-eal Kim, Seong-yong Park
  • Patent number: 9099662
    Abstract: In an aspect, a substrate for a display device that includes a plastic substrate and a planarization layer is provided.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: August 4, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sang-Jun Choi, Won-Duk Jung, Jeong-Lim Nam
  • Publication number: 20150155328
    Abstract: In an image sensor, a photoelectric convertor is arranged in an active region of substrate and a floating diffusion area is arranged over the photoelectric convertor. A transfer transistor transfers the photo charges to the floating diffusion area from the photoelectric convertor and the transfer gate electrode has a narrow upper structure that extends downwards vertically from the top surface of the substrate and a broad lower structure that is connected to the upper structure and has a width greater than a width of the upper structure. A reading device is on the top surface of the substrate and detects the photo charges from the floating diffusion area. Accordingly, the effective gate length of the transfer gate electrode is increased, and thus, high resolution image data can be obtained in spite of the size reduction of the image sensor.
    Type: Application
    Filed: October 16, 2014
    Publication date: June 4, 2015
    Inventors: Hae-Yong PARK, Kyung-Ho LEE, Jung-Chak AHN, Sang-Jun CHOI
  • Patent number: 9023582
    Abstract: A photosensitive polymer includes a repeating unit represented by Formula 1 and the photosensitive polymer has a weight average molecule weight of from about 3,000 to about 50,000:
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: May 5, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventor: Sang-Jun Choi
  • Publication number: 20150109048
    Abstract: A transistor includes a channel forming layer on a substrate, a gate on the channel forming layer and including an electrochemically indifferent metal, a solid electrolyte layer between the channel forming layer and the gate, the solid electrolyte layer is formed as a stack structure with the gate on the channel forming layer, an active metal layer including an electrochemically active metal capable of enabling channel switching by using an oxidation-reduction reaction of the electrochemically active metal so that the active metal layer forms a metal channel in a channel region between the channel forming layer and the solid electrolyte layer, and a source and a drain electrically connected to the active metal layer.
    Type: Application
    Filed: October 23, 2014
    Publication date: April 23, 2015
    Inventors: Woo-young YANG, Ki-hong KIM, Sang-jun CHOI, Young-eal KIM, Seong-yong PARK
  • Patent number: 8958002
    Abstract: An image sensor includes a first substrate including a driving element, a first insulation layer on the first substrate and on the driving element, a second substrate including a photoelectric conversion element, and a second insulation layer on the second substrate and on the photoelectric conversion element. A surface of the second insulation layer is on an upper surface of the first insulation layer. The image sensor includes a conductive connector penetrating the second insulation layer and a portion of the first insulation layer. Methods of forming image sensors are also disclosed.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: February 17, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-Jun Choi, Yoon-Dong Park, Chris Hong, Dae-Lok Bae, Jung-Chak Ahn, Chang-Rok Moon, June-Mo Koo, Suk-Pil Kim, Hoon-Sang Oh
  • Publication number: 20140141372
    Abstract: A photosensitive polymer includes a repeating unit represented by Formula 1 and the photosensitive polymer has a weight average molecule weight of from about 3,000 to about 50,000:
    Type: Application
    Filed: March 12, 2013
    Publication date: May 22, 2014
    Inventor: Sang-Jun Choi
  • Publication number: 20140140015
    Abstract: In an aspect, a substrate for a display device that includes a plastic substrate and a planarization layer is provided.
    Type: Application
    Filed: March 14, 2013
    Publication date: May 22, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sang-Jun Choi, Won-Duk Jung, Jeong-Lim Nam
  • Publication number: 20140070195
    Abstract: An organic light-emitting device with a sealing layer covering a light-emitting diode, wherein the sealing layer comprises n number of sealing units, each comprising a sequential stack of an organic film and an inorganic film, wherein n is an integer of 1 or greater and a method of manufacturing the same.
    Type: Application
    Filed: September 9, 2013
    Publication date: March 13, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Sang-Jun Choi, Won-Duk Jung, Jeong-Lim Nam
  • Publication number: 20140048853
    Abstract: An image sensor includes a first substrate including a driving element, a first insulation layer on the first substrate and on the driving element, a second substrate including a photoelectric conversion element, and a second insulation layer on the second substrate and on the photoelectric conversion element. A surface of the second insulation layer is on an upper surface of the first insulation layer. The image sensor includes a conductive connector penetrating the second insulation layer and a portion of the first insulation layer. Methods of forming image sensors are also disclosed.
    Type: Application
    Filed: October 28, 2013
    Publication date: February 20, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sang-Jun Choi, Yoon-Dong Park, Chris Hong, Dae-Lok Bae, Jung-Chak Ahn, Chang-Rok Moon, June-Mo Koo, Suk-Pil Kim, Hoon-Sang Oh
  • Patent number: 8637942
    Abstract: A transistor having a metal nitride layer pattern, etchant and methods of forming the same is provided. A gate insulating layer and/or a metal nitride layer may be formed on a semiconductor substrate. A mask layer may be formed on the metal nitride layer. Using the mask layer as an etching mask, an etching process may be performed on the metal nitride layer, forming the metal nitride layer pattern. An etchant, which may have an oxidizing agent, a chelate agent and/or a pH adjusting mixture, may perform the etching. The methods may reduce etching damage to a gate insulating layer under the metal nitride layer pattern during the formation of a transistor.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: January 28, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-Yong Kim, Ji-Hoon Cha, Woo-Gwan Shim, Chang-Ki Hong, Sang-Jun Choi
  • Publication number: 20140008705
    Abstract: A semiconductor device includes field regions formed in a substrate, and n-type impurity regions disposed between the field regions. At least one of the side surfaces of the field regions has a {100}, {310}, or {311} plane.
    Type: Application
    Filed: March 15, 2013
    Publication date: January 9, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Joon- Young Choi, Kyung-Ho Lee, Sang-Jun Choi, Tae-Hyoung Koo, Sam-Jong Choi
  • Patent number: 8614113
    Abstract: An image sensor and a method for fabricating the image sensor are provided. The method for fabricating the image sensor includes forming a first insulating layer on a semiconductor epitaxial layer having multiple pixel regions; patterning a portion of the semiconductor epitaxial layer and the first insulating layer in a boundary region between the pixel regions to form a trench; forming a buried insulating layer on the first insulating layer, filling the trench, the buried insulating layer having a planar top surface; forming a second insulating layer on the buried insulating layer; forming a first mask pattern on the second insulating layer, the first mask pattern defining an opening overlapping the trench; and performing an ion implantation process using the first mask pattern as an ion implantation mask to form a first type potential barrier region in a bottom of the trench.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: December 24, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yu-Jin Ahn, Duck-Hyung Lee, Jong-Cheol Shin, Chang-Rok Moon, Sang-Jun Choi, Eun-Kyung Park