Patents by Inventor Doo-sup Hwang

Doo-sup Hwang 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: 20060199332
    Abstract: In one embodiment, an etch stop layer and a mold layer is sequentially formed on a semiconductor substrate having an interlayer insulation layer. The interlayer insulation layer includes a conductive region formed therein. The mold layer is partially etched to expose a top surface of the etching stop layer. The exposed etching stop layer and an upper portion of the interlayer insulating layer are removed to form a first aperture part that exposes a portion of the conductive region. The conductive region exposed in the first aperture part is etched to form a second aperture part. A conductive layer for the capacitor storage node is deposited on the semiconductor substrate having the first and second aperture parts. The conductive layer provided on the mold layer is planarized to form separated capacitor storage nodes.
    Type: Application
    Filed: May 19, 2006
    Publication date: September 7, 2006
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Je-Min PARK, Doo-Sup HWANG
  • Patent number: 7074670
    Abstract: In one embodiment, an etch stop layer and a mold layer is sequentially formed on a semiconductor substrate having an interlayer insulation layer. The interlayer insulation layer includes a conductive region formed therein. The mold layer is partially etched to expose a top surface of the etching stop layer. The exposed etching stop layer and an upper portion of the interlayer insulating layer are removed to form a first aperture part that exposes a portion of the conductive region. The conductive region exposed in the first aperture part is etched to form a second aperture part. A conductive layer for the capacitor storage node is deposited on the semiconductor substrate having the first and second aperture parts. The conductive layer provided on the mold layer is planarized to form separated capacitor storage nodes.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: July 11, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Je-Min Park, Doo-Sup Hwang
  • Patent number: 6927166
    Abstract: A method of manufacturing a semiconductor device having a metal layer is provided in which variation of surface morphology resulting from thermal oxidation is suppressed. The metal layer is pretreated at a first temperature so that an upper surface of the metal layer is changed into a mixed phase of metal and oxygen and becomes substantially resistant to further oxidation during a subsequent heating at a higher temperature in an oxygen atmosphere.
    Type: Grant
    Filed: October 22, 2003
    Date of Patent: August 9, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Eun-ae Chung, Doo-sup Hwang, Cha-young Yoo
  • Publication number: 20050032304
    Abstract: In one embodiment, an etch stop layer and a mold layer is sequentially formed on a semiconductor substrate having an interlayer insulation layer. The interlayer insulation layer includes a conductive region formed therein. The mold layer is partially etched to expose a top surface of the etching stop layer. The exposed etching stop layer and an upper portion of the interlayer insulating layer are removed to form a first aperture part that exposes a portion of the conductive region. The conductive region exposed in the first aperture part is etched to form a second aperture part. A conductive layer for the capacitor storage node is deposited on the semiconductor substrate having the first and second aperture parts. The conductive layer provided on the mold layer is planarized to form separated capacitor storage nodes.
    Type: Application
    Filed: June 18, 2004
    Publication date: February 10, 2005
    Inventors: Je-Min Park, Doo-Sup Hwang
  • Patent number: 6815221
    Abstract: A method for manufacturing a capacitor of a semiconductor memory device by controlling thermal budgets is provided. In the method for manufacturing a capacitor of a semiconductor memory device, a lower electrode is formed on a semiconductor substrate. The lower electrode is heat-treated with a first thermal budget. A dielectric layer is formed on the heat-treated lower electrode. The dielectric layer is crystallized by heat-treating the dielectric layer with a second thermal budget which is smaller than the first thermal budget.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: November 9, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Wan-don Kim, Cha-young Yoo, Doo-sup Hwang, Jae-hyun Joo, Eun-ae Chung, Yong-kuk Jeong
  • Patent number: 6806183
    Abstract: Methods and apparatus for plasma annealing layers of a microelectronic capacitor on a substrate are provided to improve the leakage current characteristics of a capacitor and/or to reduce the number of impurities in an electrode.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: October 19, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-seok Kang, Doo-sup Hwang, Cha-young Yoo, Young-wook Park, Hong-bae Park
  • Publication number: 20040097033
    Abstract: A method of manufacturing a semiconductor device having a metal layer is provided in which variation of surface morphology resulting from thermal oxidation is suppressed. The metal layer is pretreated at a first temperature so that an upper surface of the metal layer is changed into a mixed phase of metal and oxygen and becomes substantially resistant to further oxidation during a subsequent heating at a higher temperature in an oxygen atmosphere.
    Type: Application
    Filed: October 22, 2003
    Publication date: May 20, 2004
    Inventors: Eun-ae Chung, Doo-sup Hwang, Cha-young Yoo
  • Patent number: 6683001
    Abstract: A method of manufacturing a semiconductor device having a metal layer is provided in which variation of surface morphology resulting from thermal oxidation is suppressed. The metal layer is pretreated at a first temperature so that an upper surface of the metal layer is changed into a mixed phase of metal and oxygen and becomes substantially resistant to further oxidation during a subsequent heating at a higher temperature in an oxygen atmosphere.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: January 27, 2004
    Assignee: Samsung Electronic Co., Ltd.
    Inventors: Eun-ae Chung, Doo-sup Hwang, Cha-young Yoo
  • Patent number: 6596186
    Abstract: A mask for a selective growth of a solid, is provided in which the solid is selectively grown in a predetermined region of a substrate and growth on other regions is suppressed. A method is also provided for selectively growing a solid on only the predetermined region of a substrate using the mask. In the mask, a surface layer and an underlayer are provided, each having different chemical compositions. Thus, even if the mask is formed on a substrate in an ultra thin film, the generation of mask defects can be suppressed and stability provided to heat and electron beams.
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: July 22, 2003
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tetsuji Yasuda, Kazuyuki Ikuta, Satoshi Yamasaki, Kazunobu Tanaka, Doo-sup Hwang
  • Publication number: 20030096472
    Abstract: Methods and apparatus for oxygen radical annealing or plasma annealing various layers (e.g., a lower electrode, a dielectric layer, or an upper electrode) of a microelectronic capacitor on a substrate are provided. By oxygen radical or plasma annealing the lower electrode of the capacitor, the leakage current characteristic of the capacitor may be improved such that the leakage current is reduced, for example, by a factor of 100 or more. The amount of impurities on the lower electrode may also be reduced. Oxygen radical or plasma annealing the dielectric layer of the capacitor may improve the leakage current characteristics of the capacitor and may reduce the amount of impurities in the dielectric layer. By ozone annealing the upper electrode, the leakage current characteristic of the capacitor may be improved and the number of oxygen vacancies formed in the dielectric layer may be reduced.
    Type: Application
    Filed: November 15, 2002
    Publication date: May 22, 2003
    Inventors: Chang-Seok Kang, Doo-Sup Hwang, Cha-Young Yoo, Young-Wook Park, Hong-Bae Park
  • Publication number: 20030054605
    Abstract: A method for manufacturing a capacitor of a semiconductor memory device by controlling thermal budgets is provided. In the method for manufacturing a capacitor of a semiconductor memory device, a lower electrode is formed on a semiconductor substrate. The lower electrode is heat-treated with a first thermal budget. A dielectric layer is formed on the heat-treated lower electrode. The dielectric layer is crystallized by heat-treating the dielectric layer with a second thermal budget which is smaller than the first thermal budget.
    Type: Application
    Filed: March 25, 2002
    Publication date: March 20, 2003
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Wan-don Kim, Cha-young Yoo, Doo-sup Hwang, Jae-hyun Joo, Eun-ae Chung, Youg-kuk Jeong
  • Patent number: 6472319
    Abstract: A method for manufacturing a capacitor of a semiconductor memory device by a two-step thermal treatment is provided. A lower electrode is formed on a semiconductor substrate. A dielectric layer is formed over the lower electrode. An upper electrode formed of a noble metal is formed over the dielectric layer. The resultant having the upper electrode undergoes a first thermal treatment under a first atmosphere including oxygen at a first temperature which is selected to be within a range of 200-600° C., which is lower than the oxidation temperature of the upper electrode. The first thermally treated resultant undergoes a second thermal treatment under a second atmosphere without oxygen at a second temperature which is selected to be within a range of 300-900° C., which is higher than the first temperature.
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: October 29, 2002
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seok-jun Won, Yun-jung Lee, Soon-yeon Park, Cha-young Yoo, Doo-sup Hwang, Eun-ae Chung, Wan-don Kim
  • Publication number: 20020146913
    Abstract: A method of manufacturing a semiconductor device having a metal layer is provided in which variation of surface morphology resulting from thermal oxidation is suppressed. The metal layer is pretreated at a first temperature so that an upper surface of the metal layer is changed into a mixed phase of metal and oxygen and becomes substantially resistant to further oxidation during a subsequent heating at a higher temperature in an oxygen atmosphere.
    Type: Application
    Filed: March 19, 2002
    Publication date: October 10, 2002
    Inventors: Eun-ae Chung, Doo-sup Hwang, Cha-young Yoo
  • Publication number: 20020076878
    Abstract: A method for manufacturing a capacitor of a semiconductor memory device by a two-step thermal treatment is provided. A lower electrode is formed on a semiconductor substrate. A dielectric layer is formed over the lower electrode. An upper electrode formed of a noble metal is formed over the dielectric layer. The resultant having the upper electrode undergoes a first thermal treatment under a first atmosphere including oxygen at a first temperature which is selected to be within a range of 200-600° C., which is lower than the oxidation temperature of the upper electrode. The first thermally treated resultant undergoes a second thermal treatment under a second atmosphere without oxygen at a second temperature which is selected to be within a range of 300-900° C., which is higher than the first temperature.
    Type: Application
    Filed: May 9, 2001
    Publication date: June 20, 2002
    Inventors: Seok-Jun Won, Yun-Jung Lee, Soon-Yeon Park, Cha-Young Yoo, Doo-Sup Hwang, Eun-Ae Chung, Wan-Don Kim
  • Publication number: 20020028322
    Abstract: A mask for a selective growth of a solid, is provided in which the solid is selectively grown in a predetermined region of a substrate and growth on other regions is suppressed. A method is also provided for selectively growing a solid on only the predetermined region of a substrate using the mask. In the mask, a surface layer and an underlayer are provided, each having different chemical compositions. Thus, even if the mask is formed on a substrate in an ultra thin film, the generation of mask defects can be suppressed and stability provided to heat and electron beams.
    Type: Application
    Filed: July 31, 2001
    Publication date: March 7, 2002
    Inventors: Tetsuji Yasuda, Kazuyuki Ikuta, Satoshi Yamasaki, Kazunobu Tanaka, Doo-Sup Hwang
  • Patent number: 6287699
    Abstract: A mask for a selective growth of a solid, is provided in which the solid is selectively grown in a predetermined region of a substrate and growth on other regions is suppressed. A method is also provided for selectively growing a solid on only the predetermined region of a substrate using the mask. In the mask, a surface layer and an underlayer are provided, each having different chemical compositions. Thus, even if the mask is formed on a substrate in an ultra thin film, the generation of mask defects can be suppressed and stability provided to heat and electron beams.
    Type: Grant
    Filed: March 5, 1999
    Date of Patent: September 11, 2001
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tetsuji Yasuda, Kazuyuki Ikuta, Satoshi Yamasaki, Kazunobu Tanaka, Doo-sup Hwang
  • Patent number: 6001660
    Abstract: Methods of forming integrated circuit capacitors include the steps of forming an electrically insulating layer on a face of a semiconductor substrate and then patterning the electrically insulating layer to define a contact hole therein. A barrier metal layer is then formed in at least a portion of the contact hole. A lower electrode metal layer is then formed on the barrier metal layer and then planarized by reflowing the lower electrode metal layer at a temperature greater than about 650.degree. C. in a nitrogen gas ambient, to define a lower capacitor electrode. A layer of material having a high dielectric constant is then formed on the lower capacitor electrode. An upper capacitor electrode is then formed on the dielectric layer, opposite the lower capacitor electrode. The dielectric layer may comprise Ba(Sr, Ti)O.sub.3, Pb(Zr, Ti)O.sub.3, Ta.sub.2 O.sub.5, SiO.sub.2, SiN.sub.3, SrTiO.sub.3, PZT, SrBi.sub.2 Ta.sub.2 O.sub.9, (Pb, La)(Zr, Ti)O.sub.3 and Bi.sub.4 Ti.sub.3 O.sub.12.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: December 14, 1999
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young-soh Park, Sang-in Lee, Cheol-seong Hwang, Doo-sup Hwang, Hag-Ju Cho