ETCHANT COMPOSITION FOR LIQUID CRYSTAL DISPLAY DEVICE

摘要

PURPOSE: An etchant composition for a liquid crystal display device and a liquid crystal display device prepared by using the composition are provided, to prevent the photoresist attack in etching by controlling the content of nitric acid and acetic acid for obtaining a desired pattern and to allow a Mo/Al-alloy dual layer, a pure Mo single layer and a Mo/Al-alloy/Mo triple layer to be etched at a time. CONSTITUTION: The etchant composition comprises 50-70 wt% of phosphoric acid; 6-7 wt% of nitric acid; 10-16 wt% of acetic acid; and the balance of deionized water. The liquid crystal display device contains the pattern which is etched by using the etchant composition. Optionally the composition comprises further a surfactant.