# US 2010/0166964 A1 · Method for attaching micro bubble array on plate surface

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- Number: US 2010/0166964 A1
- Document ID: US20100166964A1
- Status: Published application
- Kind: A1
- Application number: 12/563,043
- Filed: 2009-09-18
- Published: 2010-07-01
- Earliest claimed: 2008-12-26
- Assignees: Pusan National University Industry-University Cooperation Foundation
- Inventors: Jeung Sang Go; Moon Jeong Kim; Bong Hyun Kwon
- Web page: https://patentgrep.com/patent/US20100166964A1

## CPC

- F15D 1/10: around bodies of solid material
- B32B 2038/047: {Perforating}
- B63B 1/38: using air bubbles or air layers {gas filled volumes (waterborne vessels travelling on air cushions B60V3/06)}
- B63B 2001/387: {using means for producing a film of air or air bubbles over at least a significant portion of the hull surface}
- Y02T 70/10: Measures concerning design or construction of watercraft hulls
- F15D: FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B63B: SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING (arrangements of vessel ventilation, heating, cooling, or air-conditioning B63J2/00; floating substructures as supports of dredgers or soil-shifting machines E02F9/06)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

The present invention relates to a method for attaching a micro bubble array on a plate surface, and more particularly, to a method for attaching micro-sized bubbles on a plate surface so as to reduce fluid frictional resistance caused by flow on the plate surface that encounters with liquid. The method for attaching a micro bubble array on a plate surface according to one aspect of the present invention includes a micro groove forming step and a hydrophobic treatment step. In the micro groove forming step, a plurality of grooves with a size of 1 to 1,000 micrometers are formed in a plate surface to be arranged therein. In the hydrophobic treatment step, the plate surface having the grooves formed therein is coated with a material having a hydrophobic property. Since the plate surface has the plurality of grooves arranged therein and also is treated with a hydrophobic material, micro bubbles are formed on the micro grooves when the plate surface goes under water. According to the present invention, the fluid frictional resistance may be reduced using slide occurring between air bubbles and liquid by forming micro bubbles on a plate surface.

## Claims

### Claim 1

A method for attaching a micro bubble array on a plate surface, comprising:
a micro groove forming step for forming a plurality of grooves having a size of 1 to 1,000 micrometers in a plate surface to be arranged thereon; and
a hydrophobic treatment step for coating the plate surface having the grooves formed therein with a material having a hydrophobic property.

### Claim 2

A method for attaching a micro bubble array on a plate surface, comprising:
a micro hole forming step for forming a plurality of through holes having a size of 1 to 1,000 micrometers in a plate surface to communicate with a pressing portion and to be arranged in the plate surface; and
an air pressure providing step for supplying air pressure to the plurality of through holes from the pressing portion.

### Claim 3 (depends on 2)

The method as claimed in claim 2, further comprising a hydrophobic treatment step for coating the plate surface having the through holes formed therein with a material having a hydrophobic property after the micro hole forming step.