Patents by Inventor Woon Bong Hwang
Woon Bong 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).
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Patent number: 8241481Abstract: The present invention relates to a manufacturing method of a three dimensional structure having a hydrophobic inner surface. The manufacturing method includes anodizing a three dimensional metal member and forming fine holes on an external surface of the metal member, forming a replica by coating a non-wetting polymer material on the outer surface of the metal member and forming the non-wetting polymer material to be a replication structure corresponding to the fine holes of the metal member, forming an exterior by surrounding the replication structure with an exterior forming material, and etching the metal member and eliminating the metal member from the replication structure and the exterior forming material.Type: GrantFiled: March 12, 2008Date of Patent: August 14, 2012Assignee: Postech Academy-Industry FoundationInventors: Dong-Seob Kim, Dong-Hyun Kim, Woon-Bong Hwang, Hyun-Chul Park, Kun-Hong Lee, Geun-Bae Lim, Sang-Min Lee, Joon-Won Kim
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Publication number: 20120183882Abstract: The present invention provides a separator for a fuel cell that improves efficiency of the fuel cell by removing water generated in a membrane-electrode assembly and accumulated in a channel of the separator, a manufacturing method thereof, and a fuel cell stack including the same. The separator for the fuel cell of the present invention includes: a main body of a plate shape; a channel concavely formed in at least one surface of the main body and supplying a fuel or oxygen to a membrane-electrode assembly; and a metal layer provided to a surface of the channel and including an oxide layer formed by an anodic oxidation treatment and minute grooves of a nano-scale formed in the oxide layer, thereby forming the surface of the channel to be super-hydrophilic.Type: ApplicationFiled: September 27, 2010Publication date: July 19, 2012Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATIONInventors: Sangmin Lee, Woon Bong Hwang
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Patent number: 7994980Abstract: Provided are an apparatus for correcting a phase of a phased array antenna and a method thereof. The apparatus for correcting a phase of a phased array antenna for receiving a radio signal, includes a phased array antenna for receiving radio signals from a reference antenna and combining power of the received radio signals, a power dividing unit for dividing the combined power of the received radio signals, a voltage detecting unit for detecting voltage values of the divided radio signals, and a phase controlling unit for estimating a phase error that makes the detected voltage value maximum and controlling a phase of each radiation element of the phased array antenna using the estimated phase error.Type: GrantFiled: June 10, 2008Date of Patent: August 9, 2011Assignees: Electronics and Telecommunications Research Institute, Postech Academy-Industry FoundationInventors: Seong-Ho Son, Soon-Young Eom, Soon-Ik Jeon, Woon-Bong Hwang
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Publication number: 20110042350Abstract: A method for fabricating a 3D (three-dimensional) structure is disclosed to provide hydrophobicity to a surface of a 3D structure by using a dipping method in which a predetermined-shaped structure is immersed in a molten metal solution. The method includes: immersing a predetermined-shaped structure in a molten metal solution to coat a molten metal material on the surface of the predetermined-shaped structure; anodizing a metal base coated with the molten metal material; coating a polymer material on an outer surface of the metal-coated base to form a negative replica structure; covering an outer surface of the negative replica structure with an outer formation material; and removing the metal-coated base from the negative replica structure and the outer formation material.Type: ApplicationFiled: March 12, 2009Publication date: February 24, 2011Inventors: Dong-Seob Kim, Kun-Hong Lee, Woon-Bong Hwang, Geun-Bae Lim, Hyun-Chul Park, Byeong-Joo Lee, Sang-Min Lee, Joon-Won Kim
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Publication number: 20110012285Abstract: A method for fabricating a 3D (three-dimensional) structure such that the 3D structure has a surface with hydrophobicity by using a metal foil such as an aluminum foil is disclosed. The method includes preparing a metal foil base by attaching a metal foil on an outer surface of a predetermined-shaped 3D structure; anodizing the metal foil base; coating a polymer material on the outer surface of the metal foil base material to form a negative replica structure; forming an outer structure by covering an outer surface of the negative replica structure with an outer formation material; and removing the metal foil base.Type: ApplicationFiled: March 12, 2009Publication date: January 20, 2011Inventors: Dong-Seob Kim, Kun-Hong Lee, Woon-Bong Hwang, Geun-Bae Lim, Hyun-Chul Park, Byeong-Joo Lee, Sang-Min Lee, Joon-Won Kim
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Publication number: 20110006036Abstract: A method for fabricating a membrane is disclosed, to provide both hydrophilicity and hydrophobicity to predetermined positions of a surface of a single membrane. The method for fabricating a membrane includes: preparing a template with nano-scale holes formed on its outer surface; coating a polymer material on a predetermined pattern region of the outer surface of the template; attaching a hydrophilic film on the outer surface of the template; and removing the template from the hydrophilic film.Type: ApplicationFiled: March 12, 2009Publication date: January 13, 2011Applicant: Postech Academy-Industry FoundationInventors: Chang-Woo Lee, Dong-Seob Kim, Sun Wei, Woon-Bong Hwang
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Publication number: 20100252525Abstract: The present invention relates to a three-dimensional structure manufacturing method for performing surface treatment processes, and a replication step to provide hydrophobicity on an external surface of the three-dimensional structure. In the manufacturing method, the hydrophobicity may be provided to the external surface of the three-dimensional structure, a high cost device required in the conventional MEMS process is not used, the manufacturing cost is reduced, and the manufacturing process is simplified. In addition, it has been difficult to provide the hydrophobicity on an external surface of a three-dimensional structure having a large surface due to a spatial limitation, but in the exemplary embodiment of the present invention, the hydrophobicity may be provided to the external surface of the three-dimensional structure having a large surface, such as a torpedo, a submarine, a ship, and a vehicle, without the spatial limitation.Type: ApplicationFiled: March 12, 2008Publication date: October 7, 2010Applicant: Postech Academy-Industry FoundationInventors: Dong-Seob Kim, Sang-Min Lee, Woon-Bong Hwang, Kun-Hong Lee, Geun-Bae Lim, Joon-Won Kim, Dong-Hyun Kim, Hyun-Chul Park
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Patent number: 7776489Abstract: A clamping device includes an oblique device and a unidirectional load control plate disposed on the outside of the fuel cell stack, not on the inside of the fuel cell stack. The device can automatically compensating the surface pressure in the fuel cell stack to be maintained constant, and provide a large clamping load with a small force using the load of the fuel cell stack.Type: GrantFiled: August 14, 2008Date of Patent: August 17, 2010Assignees: Hyundai Motor Company, Pohang University of Science and TechnologyInventors: Young Bum Kum, Sae Hoon Kim, Yoo Chang Yang, Sung Ho Lee, Jung Do Suh, Chul Ho Yim, Ji Hoon Jeon, Woon Bong Hwang, Sang Min Lee, Chang Woo Lee, Seong Jin Cho
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Publication number: 20100134948Abstract: Disclosed are a humidity sensor and a fabricating method thereof. The humidity sensor includes a substrate, an anodic aluminum oxide layer formed on the substrate and having a plurality of holes, and electrodes formed on the anodic aluminum oxide layer, in order to improve sensitivity and accuracy of the humidity sensor. Further, the fabricating method of a humidity sensor includes preparing an aluminum substrate, forming an anodic aluminum oxide layer by oxidizing the aluminum substrate, and forming electrodes on the anodic aluminum oxide layer.Type: ApplicationFiled: November 13, 2009Publication date: June 3, 2010Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATIONInventors: Hyun-Chul PARK, Hye-Jin KIM, Woon-Bong HWANG, Young-Deuk KIM, Kun-Hong LEE
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Publication number: 20100126873Abstract: The present invention relates to a manufacturing method of a three dimensional structure having a hydrophobic inner surface. The manufacturing method includes anodizing a three dimensional metal member and forming fine holes on an external surface of the metal member, forming a replica by coating a non-wetting polymer material on the outer surface of the metal member and forming the non-wetting polymer material to be a replication structure corresponding to the fine holes of the metal member, forming an exterior by surrounding the replication structure with an exterior forming material, and etching the metal member and eliminating the metal member from the replication structure and the exterior forming material.Type: ApplicationFiled: March 12, 2008Publication date: May 27, 2010Applicant: Postech Academy-Industry FoundationInventors: Dong-Seob Kim, Dong-Hyun Kim, Woon-Bong Hwang, Hyun-Chul Park, Kun-Hong Lee, Geun-Bae Lim, Sang-Min Lee, Joon-Won Kim
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Publication number: 20100028615Abstract: A method of processing a superhydrophobic surface and a solid body having the superhydrophobic surface processed by the method are provided. The method includes orienting a spray nozzle of a particle sprayer toward a surface of a metal body, operating the particle sprayer to forming micro-scale protrusions and depressions on the surface of the metal body by spraying particles to the surface of the metal body, forming a plurality of nano-scale holes on the surface of the metal body by treating the metal body through an anodic oxidation process, forming a replica by immersing the metal body in a non-wetting polymer material and solidifying the non-wetting polymer material, and forming a superhydrophobic dual-scaled surface structure having nano-scale pillars formed on micro-scale protrusions and depressions by removing the metal body and an anodic oxide from the replica.Type: ApplicationFiled: July 5, 2007Publication date: February 4, 2010Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATIONInventors: Woon-Bong Hwang, Kun-Hong Lee, Joon-Won Kim, Hyun-Chul Park, Dong-Hyun Kim
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Publication number: 20090317590Abstract: A method of processing a superhydrophobic surface and a solid body having the superhydrophobic surface processed by the method are provided. The method forming a plurality of nano-scale holes having nano-scale diameter on a surface of a metal body through an anode oxidation process, forming a replica by immersing the metal body provided with the nano-scale holes in a hydrophobic polymer material and solidifying the hydrophobic polymer material, and forming the superhydrophobic surface by removing the metal body with an anode oxide. The solid body includes a base, and a surface structure having micro-scale unevenness formed by a plurality of bunches formed by a plurality of adjacent pillars that are formed on the base and have a nano-scale diameter.Type: ApplicationFiled: July 5, 2007Publication date: December 24, 2009Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATIONInventors: Woon-Bong Hwang, Kun-Hong Lee, Dong-Hyun Kim, Hyun-Chul Park
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Publication number: 20090315774Abstract: Provided are an apparatus for correcting a phase of a phased array antenna and a method thereof. The apparatus for correcting a phase of a phased array antenna for receiving a radio signal, includes a phased array antenna for receiving radio signals from a reference antenna and combining power of the received radio signals, a power dividing unit for dividing the combined power of the received radio signals, a voltage detecting unit for detecting voltage values of the divided radio signals, and a phase controlling unit for estimating a phase error that makes the detected voltage value maximum and controlling a phase of each radiation element of the phased array antenna using the estimated phase error.Type: ApplicationFiled: June 10, 2008Publication date: December 24, 2009Applicants: ELECTRONICS & TELECOMMUNICATIONS RESEARCH INSTITUTE, POSTECH ACADEMY-INDUSTRY FOUNDATIONInventors: Seong-Ho SON, Soon-Young EOM, Soon-Ik JEON, Woon-Bong HWANG
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Publication number: 20090260702Abstract: The present invention relates to a method for manufacturing a solid body having a superhydrophobic surface structure formed by using a surface treatment of a metal body, a replication process, and a polymer sticking phenomenon to increase efficiency of fluid transfer and prevent foreign materials from being accumulated in the tube, and a superhydrophobic fluid transfer tube using the method. The superhydrophobic fluid transfer tube includes a fluid guider and a solid body provided on a fluid contact surface of the fluid guider and has micrometer-scaled unevenness and nanometer-scaled protrusions.Type: ApplicationFiled: September 19, 2007Publication date: October 22, 2009Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATIONInventors: Dong-Hyun Kim, Sang-Min Lee, Il-Sin Bae, Dong-Seob Kim, Duk-Hyun Choi, Chang-Woo Lee, Ji-Hoon Jeon, Seong-Ho Son, Tae-Chul Moon, Woon-Bong Hwang, Joon-Won Kim, Hyun-Chul Park, Kun-Hong Lee
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Publication number: 20090226794Abstract: A clamping device includes an oblique device and a unidirectional load control plate disposed on the outside of the fuel cell stack, not on the inside of the fuel cell stack. The device can automatically compensating the surface pressure in the fuel cell stack to be maintained constant, and provide a large clamping load with a small force using the load of the fuel cell stack.Type: ApplicationFiled: August 14, 2008Publication date: September 10, 2009Applicants: Hyundai Motor Company, Pohang University of Science and TechnologyInventors: Young Bum Kum, Sae Hoon Kim, Yoo Chang Yang, Sung Ho Lee, Jung Do Suh, Chul Ho Yim, Ji Hoon Jeon, Woon Bong Hwang, Sang Min Lee, Chang Woo Lee, Seong Jin Cho
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Publication number: 20050064268Abstract: A fastening mechanism of a fuel cell includes a pair of end plates for supporting the fuel cell stack by respectively being mounted to both ends of the fuel cell stack. A plurality of fastening bands elongated in an accumulation direction of the fuel cell stack pressurize the end plate by a predetermined pressure. Such a fastening mechanism enables uniform pressure on a separator and enhances sealing of a fuel cell stack.Type: ApplicationFiled: September 23, 2004Publication date: March 24, 2005Inventors: Kyu Taek Cho, Soo Whan Kim, Woon Bong Hwang, Ji Hoon Jeon