Woon-Bong Hwang
Woon-Bong Hwang, Pohang-Si KR
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20100134948 | HUMIDITY SENSOR HAVING ANODIC ALUMINUM OXIDE LAYER, AND FABRICATING METHOD THEREOF - 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. | 06-03-2010 |
20110012285 | METHOD FOR FABRICATING 3D STRUCTURE HAVING HYDROPHOBIC SURFACE USING METAL FOIL - 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. | 01-20-2011 |
20110042350 | METHOD FOR FABRICATING 3D STRUCTURE HAVING HYDROPHOBIC SURFACE BY DIPPING METHOD - 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. | 02-24-2011 |
20120183882 | SEPARATOR FOR A FUEL CELL, A PRODUCTION METHOD THEREFOR AND A FUEL CELL STACK COMPRISING THE SAME - 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. | 07-19-2012 |
20130139830 | MASK AND A PRODUCTION METHOD THEREFOR - A mask and a method of manufacturing the same that intercept a virus are provided. The mask includes: a mask body; an exhalation module that is formed at one surface of the mask body; and an inhalation module that is formed at the one surface of the mask body and that includes an inhalation filter. The inhalation filter includes an anodized aluminum oxide film. | 06-06-2013 |
Woon-Bong Hwang, Gyeongsangbuk-Do KR
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20110006036 | Method for Fabricating Membrane having Hydrophilicity and Hydrophobicity - 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. | 01-13-2011 |
Woon-Bong Hwang, Pohang-City KR
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20100028615 | METHOD FOR FABRICATING SUPERHYDROPHOBIC SURFACE AND SOLID HAVING SUPERHYDROPHOBIC SURFACE STRUCTURE BY THE SAME METHOD - 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. | 02-04-2010 |
20100126873 | MANUFACTURING METHOD OF 3D SHAPE STRUCTURE HAVING HYDROPHOBIC INNER SURFACE - 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. | 05-27-2010 |
20100252525 | MANUFACTURING METHOD OF 3D SHAPE STRUCTURE HAVING HYDROPHOBIC EXTERNAL SURFACE - 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. | 10-07-2010 |
Woon-Bong Hwang, Gyeongbuk KR
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20090315774 | APPARATUS FOR CORRECTING PHASE OF PHASED ARRAY ANTENNA AND METHOD THEREOF - 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. | 12-24-2009 |
Woon-Bong Hwang, Gyungsangbuk-Do KR
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20090260702 | METHOD FOR FABRICATING SOLID BODY HAVING SUPERHYDROPHOBIC SURFACE STRUCTURE AND SUPERHYDROPHOBIC TUBE USING THE SAME METHOD - 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. In the method, a plurality of nanometer-scaled holes are formed on a surface of a metal body through an anodizing process, a replica is formed by immersing the metal body provided with the nanometer-scaled holes in a non-wetting polymer material and solidifying the non-wetting polymer material, the solid body having the superhydrophobic surface is formed by removing the metal body and an anode oxide from the replica, and the solid body is provided to a fluid contact surface of a fluid guider for guiding a fluid. | 10-22-2009 |
20090317590 | METHOD FOR FABRICATING SUPERHYDROPHOBIC SURFACE AND SOLID HAVING SUPERHYDROPHOBIC SURFACE STRUCTURE BY THE SAME METHOD - 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. | 12-24-2009 |