KR100550095B1 - Method of the surface treatment with metal pannel using LCD - Google Patents

Method of the surface treatment with metal pannel using LCD Download PDF

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KR100550095B1
KR100550095B1 KR1020040014853A KR20040014853A KR100550095B1 KR 100550095 B1 KR100550095 B1 KR 100550095B1 KR 1020040014853 A KR1020040014853 A KR 1020040014853A KR 20040014853 A KR20040014853 A KR 20040014853A KR 100550095 B1 KR100550095 B1 KR 100550095B1
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metal panel
surface treatment
weight
immersion
metal
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KR20050089437A (en
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정구용
차수규
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주식회사 인지디스플레이
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C23G1/088—Iron or steel solutions containing organic acids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/202—LCD, i.e. liquid crystal displays

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  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

본 발명은 액정표시장치(LCD)에 구비된 백라이트 유니트(Backlight unit)의 후면 전체를 보강하는 알루미늄 또는 용융아연도금강판 등의 소재로 된 금속패널의 제조과정에 그 표면에 잔류된 이물질을 제거하고 물성을 부여하기 위한 표면처리 용액을 조성함으로써, 후공정을 단축함과 아울러 폐수처리와 작업성을 향상시킬 수 있게한 액정표시장치의 금속패널 표면처리방법에 관한 것으로,The present invention removes foreign substances remaining on the surface of the metal panel made of a material such as aluminum or hot-dip galvanized steel sheet to reinforce the entire back of the backlight unit provided in the liquid crystal display (LCD) By forming a surface treatment solution for imparting physical properties, the present invention relates to a method for surface treatment of a metal panel of a liquid crystal display device capable of shortening a post-process and improving wastewater treatment and workability.

즉, 금속패널을 침적시키기 위한 침적조에 벤조트리아졸(C6H5N3) 7~10중량%, 티오요소((NH2)2CS) 10~13중량%, 그루콘산소다(C6U11O7Na) 4~6중량%, 계면활성제((C2-H4-O)10.C15-H24-0) 25~32중량%, 구연산(C4H8O7) 18~22중량% 및 물 25중량%를 혼합 조성하여 60℃의 온도분위기를 유지되게 하고, 표면처리를 하기 위한 다수의 금속패널을 망사형 트레이에 각기 수직으로 세워 횡방향으로 배열되게 안착시킨 상태에서 상기 조성물이 담긴 침적조에 침지시키며, 침적조에서 적당시간 동안 침지를 완료한 후 수세설비로 이동시켜 수세과정을 거치고, 수세된 금속패널은 트레이와 함께 65℃의 온도분위기를 유지하는 탕세설비를 거쳐 탕세를 완료한 후 65~75℃의 온도가 유지되는 건조실에서 건조과정을 거쳐 표면처리를 완료함에 따라, 간단한 공정으로 금속패널의 가공중에 그 표면에 잔류된 기름성분을 제거하는 탈지작용과 표면의 물성을 향상시키는 피막을 형성하게 된 것이다.That is, the benzotriazole bath immersion for depositing the metal panel (C 6 H 5 N 3) 7 ~ 10 % by weight, and thiourea ((NH 2) 2 CS) 10 ~ 13 % by weight, trees are cone oxygen (C 6 U 11 O 7 Na) 4-6 wt%, Surfactant ((C2-H4-O) 10.C15-H24-0) 25-32 wt%, Citric acid (C 4 H 8 O 7 ) 18-22 wt% 25% by weight of water is mixed to maintain a temperature atmosphere of 60 ° C., and a plurality of metal panels for surface treatment are placed vertically on a mesh tray, respectively, and placed in a transverse direction. It is immersed in the immersion tank. After immersion in the immersion tank for a suitable time, it is moved to the washing equipment to go through the washing process, and the washed metal panel is completed with the tray through the washing equipment to maintain the temperature atmosphere of 65 ℃. After finishing the surface treatment through the drying process in a drying room where the temperature of 65 ~ 75 ℃ is maintained, during the processing of the metal panel in a simple process To a form a degreasing effect and coating film to improve the physical properties of the surface to remove the oil component remaining on the surface thereof.

액정표시장치, 알루미늄, 탈지, 내식성LCD, Aluminum, Degreasing, Corrosion Resistance

Description

액정표시장치의 금속패널 표면처리방법{Method of the surface treatment with metal pannel using LCD}Metal panel surface treatment method of liquid crystal display device {Method of the surface treatment with metal pannel using LCD}

도 1은 종래의 액정표시장치에 사용되는 금속패널의 표면처리공정을 나타낸 흐름도,1 is a flow chart showing a surface treatment process of a metal panel used in a conventional liquid crystal display device;

도 2는 본 발명의 금속패널 표면처리방법에 대한 흐름도이다.2 is a flow chart of the metal panel surface treatment method of the present invention.

본 발명은 액정표시장치의 금속패널 표면처리방법, 보다 상세하게는 액정표시장치(LCD)에 구비된 백라이트 유니트(Backlight unit)의 후면 전체를 보강하는 알루미늄 또는 용융아연도금강판 등의 소재로 된 금속패널의 제조과정에 그 표면에 잔류된 이물질을 제거하고 물성을 부여하기 위한 표면처리 용액을 조성함으로써, 후공정을 단축함과 아울러 폐수처리와 작업성을 향상시킬 수 있게한 액정표시장치의 금속패널 표면처리방법에 관한 것이다.The present invention relates to a metal panel surface treatment method of a liquid crystal display device, and more particularly, a metal made of a material such as aluminum or hot dip galvanized steel sheet to reinforce the entire rear surface of a backlight unit included in a liquid crystal display (LCD). The metal panel of the liquid crystal display device which can shorten the post-process and improve the wastewater treatment and workability by forming a surface treatment solution to remove foreign substances remaining on the surface and impart physical properties during the manufacturing process of the panel. It relates to a surface treatment method.

일반적으로, 알루미늄 또는 그 합금 판재는 열전도성과 내식성이 우수하며 경량의 가공성이 양호한 특성을 구비함으로써 각종 기물에 사용되고 있으며, 화상을 지원하는 전자제품의 모니터가 초박형의 LCD로 대체되는 과정에서 그 LCD를 구 성하는 주요 부품중 하나로도 널리 적용되고 있다.In general, aluminum or its alloy plate is used in various materials because of its excellent thermal conductivity, corrosion resistance, light weight and good workability, and in the process of replacing an ultra-thin LCD with a monitor of an electronic product supporting image, It is widely applied as one of the major components.

전기·전자제품에 알루미늄 또는 그 합금 및 용융아연도금강판 등으로 된 소재(이하, "금속패널"이라 함)를 부품으로 사용하기 위해서는 해당 설계치로 가공된 것을 이물질의 제거와 내식처리 등의 표면처리 공정이 필수적이었고, 특히 LCD의 백라이트 유니트에 적용되는 금속패널의 경우에는 초정밀도를 요구하게 됨으로써 상기 이물질의 제거와 내식처리는 물론 탈지, 광택도의 유지, 내강성 부여 및 변색방지 등과 같은 후처리 공정이 필수적이다.In order to use parts of materials such as aluminum or its alloys and hot-dip galvanized steel sheets (hereinafter referred to as "metal panels") in electrical and electronic products, those processed by the relevant design values are removed from the surface and treated with corrosion. The process was essential, especially in the case of the metal panel applied to the backlight unit of the LCD, the ultra-precision is required, so that the post-treatment such as degreasing, maintaining the glossiness, giving strength resistance and preventing discoloration as well as removing the foreign matter and corrosion treatment The process is essential.

도 1은 종래의 액정표시장치에 사용되는 금속패널의 표면처리공정을 나타낸 흐름도로서, 해당 기기의 설계치에 따라 절단과 절곡 및 펀칭 등 여러 공정을 거쳐 가공된 금속패널의 표면상태를 변화되게 에칭을 한 후 적어도 2회의 수세를 하고, 에칭된 소재는 전해연마를 하여 탈지와 산세 등의 불순물을 제거한 후 다시 수세를 한다.1 is a flow chart illustrating a surface treatment process of a metal panel used in a conventional liquid crystal display device, and etching is performed to change the surface state of a metal panel processed through various processes such as cutting, bending, and punching according to a design value of the device. After washing with water at least twice, the etched material is subjected to electropolishing to remove impurities such as degreasing and pickling, and then washing with water again.

상기 전해연마를 거친 소재는 피막처리를 하여 내식성을 부여하고, 피막처리 후에는 소재의 표면을 씰링(sealing)하는 봉공처리를 한 후 수세와 탕세 및 건조를 거쳐 표면처리를 완성하였다.The electropolished material was subjected to a coating treatment to give corrosion resistance, and after the coating treatment, a sealing was performed to seal the surface of the material, followed by washing with water, hot water, and drying to complete the surface treatment.

그러나 위와 같은 종래의 표면처리기술은 에칭공정을 위하여 가성소다 20중량%가 함유된 약액을 50℃의 온도분위기를 유지하는 설비를 필요로 하고, 전해연마를 위해 인산 60중량%와 황산 30중량% 및 무수크롬산 10중량%를 80℃의 온도분위기로 하는 전기도금조를 사용하며, 피막처리를 위해 황산과 물을 동일비율로 하는 전기도금조를 사용하였으며, 또한 봉공처리를 위해 삭산니켈에 물 10중량%가 함유된 용액을 60℃의 온도분위기를 유지하는 설비 등을 사용하게 됨으로써, 공정이 매우 복잡하였음은 물론 공정에 따른 설비와 약액이 과다하여 생산비용이 증가되는 문제점이 있었다.However, the conventional surface treatment technique as described above requires an apparatus for maintaining a temperature atmosphere of 50 ° C in a chemical liquid containing 20% by weight of caustic soda for etching, and 60% by weight of phosphoric acid and 30% by weight of sulfuric acid for electrolytic polishing. And 10% by weight of chromic anhydride using an electroplating bath having a temperature atmosphere of 80 ° C., an electroplating bath having the same ratio of sulfuric acid and water for coating treatment, and 10 parts of water to nickel nickel saxane for sealing. By using a solution containing a weight percent of the solution, such as maintaining a temperature atmosphere of 60 ℃, the process was very complicated, there was a problem that the production cost is increased due to the excessive equipment and chemical liquid according to the process.

특히, 전해연마와 피막처리를 하기 위해 전기도금조에 다량의 금속패널을 투입할 때 각 금속패널마다 전극을 접속되게 해야 됨으로써 준비와 회수에 따른 공수가 증가되어 생산성이 극히 저조하였으며, 도금조에서 인접된 금속패널이 접촉될 때 흠집이 유발되면서 제품이 불량해지는 등의 문제점도 있었다.In particular, when a large amount of metal panels are put into an electroplating bath for electropolishing and coating, electrodes must be connected to each metal panel, resulting in increased labor due to preparation and recovery, and extremely low productivity. When the old metal panel is in contact with the scratches are also caused problems such as product defects.

본 발명은 위와 같은 종래의 금속패널을 표면처리할 때 발생되는 문제점을 감안하여 안출한 것으로, 그 목적은 액정표시장치에 적용되는 금속패널의 표면처리에 따른 공정을 단축할 수 있는 액정표시장치의 금속패널 표면처리방법을 제공하는 것이다.The present invention has been made in view of the problems caused when the surface treatment of the conventional metal panel as described above, the object of the liquid crystal display device that can shorten the process according to the surface treatment of the metal panel applied to the liquid crystal display device It is to provide a metal panel surface treatment method.

이러한 목적을 달성하기 위한 본 발명은 금속패널을 침적시키기 위한 침적조에 벤조트리아졸(C6H5N3) 7~10중량%, 티오요소((NH2)2CS) 10~13중량%, 그루콘산소다(C6U11O7Na) 4~6중량%, 계면활성제((C2-H4-O)10.C15-H24-0) 25~32중량%, 구연산(C4H8O7) 18~22중량% 및 물 25중량%를 혼합 조성하여 60℃의 온도분위기를 유지되게 하고, 표면처리를 하기 위한 다수의 금속패널을 망사형 트레이에 각기 수직으로 세워 횡방향으로 배열되게 안착시킨 상태에서 상기 조성물이 담긴 침적조에 침지시키며, 침적조에서 적당시간 동안 침지를 완료한 후 수세설비로 이동시켜 수세과정을 거치고, 수세된 금속패널은 트레이와 함께 65℃의 온도분위기를 유지하는 탕세설비를 거쳐 탕세를 완료한 후 65~75℃의 온도가 유지되는 건조실에서 건조과정을 거쳐 표면처리를 완료함에 따라, 간단한 공정으로 금속패널의 가공중에 그 표면에 잔류된 기름성분을 제거하는 탈지작용과 표면의 물성을 향상시키는 피막을 형성하게 됨을 특징으로 한다. The present invention for achieving this object is 7 to 10% by weight of benzotriazole (C 6 H 5 N 3 ), 10 to 13% by weight of thiourea ((NH 2 ) 2 CS) in the deposition tank for depositing the metal panel, Sodium Gluconate (C 6 U 11 O 7 Na) 4-6 wt%, Surfactant ((C2-H4-O) 10.C15-H24-0) 25-32 wt%, Citric acid (C 4 H 8 O 7 ) 18 ~ 22% by weight and 25% by weight of water are mixed to maintain the temperature atmosphere of 60 ℃, and a plurality of metal panels for surface treatment are placed vertically on the mesh tray and placed in a horizontal direction. After immersing in the immersion tank containing the composition in the above state, after immersion for a suitable time in the immersion tank is moved to the washing equipment to go through the washing process, the washed metal panel with a tray hot water to maintain the temperature atmosphere of 65 ℃ After finishing the hot water through the equipment, the surface treatment is completed by the drying process in the drying room where the temperature of 65 ~ 75 ℃ is maintained, A simple process is characterized by degreasing to remove oil components remaining on the surface of the metal panel and forming a film to improve the physical properties of the surface.

이하, 본 발명의 액정표시장치의 금속패널 표면처리방법을 첨부도면을 참조하여 설명하면 다음과 같다.Hereinafter, the metal panel surface treatment method of the liquid crystal display device according to the present invention will be described with reference to the accompanying drawings.

도 2는 본 발명의 금속패널 표면처리방법에 대한 흐름도로서, 컴퓨터 모니터 및 TV 수상기 등의 화상을 제공하기 위한 액정표시장치(LCD)의 후면에 보강작용을 하는 알루미늄 또는 용융아연도금강판 등의 소재로 된 금속패널이 적용되고 있으며, 본 발명에서는 상기 금속패널의 표면에 잔류된 이물질을 제거하고 물성을 높이기 위한 표면처리 기술을 마련하기 위한 것이다.Figure 2 is a flow chart of the metal panel surface treatment method of the present invention, a material such as aluminum or hot-dip galvanized steel sheet to reinforce the back of the liquid crystal display (LCD) for providing an image such as a computer monitor and TV receiver The metal panel is applied, the present invention is to provide a surface treatment technology for removing the foreign matter remaining on the surface of the metal panel and to improve the physical properties.

LCD에 적용하기 위한 스트립형태의 소재를 피어싱, 측면부 커팅, 가장자리 포밍, 벤딩 및 절곡공정 등을 거쳐 금속패널이 제조되며, 이 금속패널에 표면처리를 하기 위해서 침적액을 조성하는 것이 우선이다.A metal panel is manufactured through piercing, side cutting, edge forming, bending and bending of a strip material to be applied to an LCD, and a deposition solution is first formed to surface-treat the metal panel.

다량의 금속패널을 동시에 수용할 수 있는 크기의 침적조를 마련하여 이에 벤조트리아졸(C6H5N3) 7~10중량%, 티오요소((NH2)2CS) 10~13중량%, 그루콘산소다(C6U11O7Na) 4~6중량%, 계면활성제((C2-H4-O)10.C15-H24-0) 25~32중량%, 구연산(C4H8O7) 18~22중량% 및 물 25중량%를 혼합하여 침적액을 조성하고, 상기 침적액은 60℃의 온도분위기와 pH(수소이온농도) 4를 유지되게 한다.
상기 계면활성제는 에톡실산화 노닐페놀(EO-10)(ETHOXYLATED NONYLPHENOL (EO-10))의 물질로 된 것이 바람직하다.A deposition tank of a size that can accommodate a large amount of metal panels at the same time to prepare a benzotriazole (C 6 H 5 N 3 ) 7 ~ 10% by weight, thiourea ((NH 2 ) 2 CS) 10 ~ 13% by weight , Sodium Gluconate (C 6 U 11 O 7 Na) 4-6% by weight, Surfactant ((C2-H4-O) 10.C15-H24-0) 25-32% by weight, Citric acid (C 4 H 8 O 7 ) 18 to 22% by weight and 25% by weight of water to form an immersion liquid, the immersion liquid is to maintain a temperature atmosphere of 60 ℃ and pH (hydrogen ion concentration) 4.
The surfactant is preferably made of a material of ethoxylated nonylphenol (EO-10).

표면처리를 하기 위한 금속패널은 다수개를 망사형 트레이에 각기 수직으로 세워 횡방향으로 배열되게 안착시킨 상태에서 상기 조성물이 담긴 침적조의 침적액 중에 침지시키며, 침지과정에 금속패널의 표면에 약액이 고르게 점착되게 하기 위해 금속패널을 침적액 중에서 상하 또는 좌우로 흔들어준다.The metal panel for surface treatment is immersed in the immersion liquid of the immersion tank containing the composition in a state in which a plurality of metal panels are placed vertically on the mesh tray and arranged in a horizontal direction, and the chemical liquid is deposited on the surface of the metal panel during the immersion process. Shake the metal panel up and down or left and right in the immersion liquid to evenly adhere.

침적조에서 적당시간 동안 침지를 완료한 후 금속패널이 담긴 트레이를 수세설비로 이동시켜 수세를 하게 되는데, 이때 수세설비는 금속패널이 담긴 트레이를 수조의 상부에서 수조내로 담겨지게 한 후 들어올릴 수 있는 상부가 개방된 욕조 구조로 하고, 수세횟수는 적어도 2회 이상 하는 것이 바람직하다.After immersion in the immersion tank for a suitable time, the tray containing the metal panel is moved to the washing facility to wash the water. At this time, the washing machine can lift the tray containing the metal panel from the top of the tank into the tank and lift it. It is preferable that the upper portion of the tub structure is open, and the number of washings is at least two times.

상기 수세과정을 거친 금속패널은 트레이와 함께 65℃ 내외의 온도분위기를 유지하는 탕세설비로 이송시켜 탕세를 하며, 탕세후 금속패널이 담긴 트레이를 65~75℃의 온도가 유지되는 건조실로 이송시켜 건조를 하여 표면처리를 완료하게 된 것이다.The metal panel, which has undergone the washing process, is transferred to a hot water washing facility that maintains a temperature atmosphere of about 65 ° C together with the tray, and the hot water is washed. It is dried to complete the surface treatment.

따라서, 상기와 같은 본 발명의 표면처리방법은 벤조트리아졸, 티오요소, 그루콘산소다, 계면활성제 및 구연산을 적당 비율로 혼합한 후 물을 희석하여 조성한 침적액 조성물을 사용하여 금속패널의 표면을 청결하게 하면서 내식성, 밀착성, 광택성 및 내강성 등을 부여하여 산화와 부식 및 변색을 방지하는 물성을 향상되게 한 것이다.Therefore, the surface treatment method of the present invention as described above is a surface of the metal panel using a dipping liquid composition prepared by mixing benzotriazole, thiourea, sodium gluconate, surfactant and citric acid in an appropriate ratio and diluting water It is to improve the physical properties to prevent oxidation, corrosion and discoloration by giving the corrosion resistance, adhesion, gloss and strong resistance while cleaning.

또한 본 발명의 방법은 다량의 금속패널이 담긴 트레이를 침적액 조성물이 담긴 침적조에 침적하는 공정과 수세, 탕세 및 건조공정을 통해 작업이 완료됨으로써 종래에 전기분해에 의해 표면연마를 하고 피막처리를 할 때에 비해 공정을 현저 하게 단축할 수 있음은 물론 전력소모를 줄일 수 있으며, 환경에 친화적인 침적액을 사용하여 폐수의 발생을 극소화하면서 원가를 절감 할 수 있다.In addition, the method of the present invention is completed by the process of immersing the tray containing a large amount of metal panels in the immersion tank containing the immersion liquid composition, and washing with water, hot water and drying process to perform the surface polishing and coating treatment by electrolysis in the past Compared to this, the process can be significantly shortened and the power consumption can be reduced, and the environment-friendly deposition liquid can be used to minimize the generation of waste water and to reduce the cost.

이와 같은 본 발명의 액정표시장치의 금속패널 표면처리방법은 알루미늄 또는 용융아연도금강판 등의 소재로 된 금속패널의 특성에 맞는 표면처리액을 조성하여 간단한 공정에 의해 금속패널의 표면을 청결하게 하면서 내식성, 밀착성, 광택성 및 내강성 등의 물성을 향상시킬 수 있는 효과가 있다.Such a metal panel surface treatment method of the liquid crystal display device of the present invention by forming a surface treatment solution suitable for the characteristics of the metal panel made of a material such as aluminum or hot-dip galvanized steel sheet to clean the surface of the metal panel by a simple process There is an effect that can improve the physical properties, such as corrosion resistance, adhesion, glossiness and strength.

또한 본 발명은 종래에 전기분해에 의해 표면을 연마하고 피막처리를 할 때에 비해 공정을 현저하게 단축할 수 있음은 물론 전력소모를 줄일 수 있으며, 환경에 친화적인 침적액을 사용하여 폐수의 발생을 극소화할 수 있는 장점도 있다.In addition, the present invention can significantly shorten the process compared to when the surface is polished and coated by electrolysis, as well as to reduce the power consumption, and to generate wastewater using environmentally friendly deposition liquids. There are also advantages that can be minimized.

Claims (4)

LCD에 적용되는 알루미늄 또는 용융아연도금강판 등의 소재로 된 금속패널의 표면처리를 하기 위해 마련된 침적조에, 벤조트리아졸(C6H5N3) 7~10중량%, 티오요소((NH2)2CS) 10~13중량%, 그루콘산소다(C6U11O7Na) 4~6중량%, 계면활성제((C2-H4-O)10.C15-H24-0) 25~32중량%, 구연산(C4H8O7) 18~22중량% 및 물 25중량%를 혼합하여 조성된 침적액을 투입한 상태에서 60℃의 온도와 pH(수소이온농도) 4를 유지하는 분위기를 만든 후 금속패널을 침지하는 단계와, 상기 침적조에서 적당시간 동안 침지를 완료한 후 금속패널을 수세설비로 이동시켜 적어도 2회의 수세를 하는 단계와, 상기 수세과정을 거친 금속패널을 65℃의 온도분위기를 유지하는 탕세설비로 이송시켜 탕세를 하는 단계와, 탕세후 금속패널을 65~75℃의 온도가 유지되는 건조실로 이송시켜 건조를 하여 표면처리를 완료하는 단계를 특징으로 하는 액정표시장치의 금속패널 표면처리방법.7-10% by weight of benzotriazole (C 6 H 5 N 3 ), thiourea ((NH 2 ) in an immersion tank prepared for surface treatment of a metal panel made of a material such as aluminum or hot dip galvanized steel applied to LCD. ) 2 CS) 10-13% by weight, Sodium Gluconate (C 6 U 11 O 7 Na) 4-6% by weight, Surfactant ((C2-H4-O) 10.C15-H24-0) 25-32 Atmosphere that maintains a temperature of 60 ° C and pH (hydrogen ion concentration) 4 in a state in which an immersion liquid prepared by mixing weight%, citric acid (C 4 H 8 O 7 ) 18-22 weight% and water 25 weight% is added. After the step of immersing the metal panel, and after the immersion for a suitable time in the immersion tank and moving the metal panel to the water washing equipment to wash at least twice, and the metal panel subjected to the water washing process 65 ℃ Transfer the hot water to the hot water facility to maintain the temperature atmosphere of the hot water and transfer the metal panel to the drying room where the temperature is maintained at 65 ~ 75 ℃ after hot water to dry the surface. Method of treating the surface of the metal panel of the liquid crystal display device characterized in that the step of completing the process. 삭제delete 제 1항에 있어서, 상기 표면처리를 하기 위한 금속패널은 다수개를 망사형 트레이에 각기 수직으로 세워 횡방향으로 배열되게 안착시킨 상태에서 상기 조성물이 담긴 침적조의 침적액 중에 침지시키고, 트레이에 다수의 금속패널이 담긴상태에서 수세와 탕세 및 건조를 거치게 됨을 특징으로 하는 액정표시장치의 금속패널 표면처리방법. The method of claim 1, wherein the metal panel for the surface treatment is immersed in the immersion liquid of the immersion tank containing the composition in a state in which a plurality of the metal panels are placed vertically in a mesh tray to be arranged in a transverse direction, and a plurality of metal panels in the tray The metal panel surface treatment method of the liquid crystal display device, characterized in that the washing and washing and drying in the state containing the metal panel. 제 1항에 있어서, 상기 침적조에 트레이에 담긴 다수의 금속패널을 동시에 침지시키는 과정에 금속패널의 표면에 약액이 고르게 점착되게 하기 위해 금속패널을 침적액 중에서 상하 또는 좌우로 흔들어 주는 것을 특징으로 하는 액정표시장치의 금속패널 표면처리방법. The method of claim 1, wherein in order to uniformly adhere the chemical liquid to the surface of the metal panel in the process of simultaneously immersing the plurality of metal panels in the tray in the immersion tank characterized in that the metal panel in the immersion liquid shaking up and down or left and right Metal panel surface treatment method of liquid crystal display device.
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