Bottom chassis, method of fabricating the same, and liquid crystal display including the same

Abstract

Provided are a bottom chassis, a method of fabricating the same, and a liquid crystal display (LCD) including the same. The bottom chassis is fabricated using an aluminum alloy plate including, by weight, 0.5 to 1.5% manganese, 0.8 to 1.5% magnesium, 0.01 to 0.03% titanium, less than 0.02% molybdenum, and 96% or more aluminum.

What is claimed is: 
     
         1 . A method of fabricating a bottom chassis, the method comprising:
 fabricating an aluminum alloy plate by preparing an aluminum alloy material, rolling the aluminum alloy material at a reduction ratio of 50% or more, and annealing the rolled aluminum alloy material for at least 13 hour; and   fabricating the bottom chassis by processing the aluminum alloy plate.   
     
     
         2 . The method of  claim 1 , wherein the aluminum alloy plate comprises, by weight, 0.5 to 1.5% manganese, 0.8 to 1.5% magnesium, 0.01 to 0.03% titanium, less than 0.02% molybdenum, and 96% or more aluminum. 
     
     
         3 . The method of  claim 2 , wherein the aluminum alloy plate further comprises, by weight, 0.1 to 0.3% silicon, 0.4 to 0.6% iron, 0.1 to 0.2% copper, less than 0.03% chrome, and less than 0.05% zinc. 
     
     
         4 . The method of  claim 1 , wherein the rolling of the aluminum alloy material is performed such that the aluminum alloy plate has a thickness of 0.6 to 1.2 mm. 
     
     
         5 . The method of  claim 1 , wherein in the rolling of the aluminum alloy material, the aluminum alloy material is cold-rolled. 
     
     
         6 . The method of  claim 1 , wherein the annealing of the rolled aluminum alloy material comprises heat-treating the rolled aluminum alloy material for at least 7 hours and then performing furnace cooling for at least 5 hours. 
     
     
         7 . The method of  claim 6 , wherein the heat-treating of the rolled aluminum alloy material is performed at a temperature ranging from 400 to 420° C. 
     
     
         8 . The method of  claim 1 , wherein the fabricating of the aluminum alloy plate further comprises performing tension leveling after the annealing of the rolled aluminum alloy material, such that the aluminum alloy plate has target yield strength. 
     
     
         9 . The method of  claim 1 , wherein the aluminum alloy plate has a thickness of 0.6 to 1.2 mm, a yield strength of 110 to 120 MPa, a tensile strength of 185 to 205 MPa, an elongation of 18 to 22%, and a heat transfer coefficient of 160 to 180.