A ETCHING PASTE COMPOSITION FOR ETCHING THE TRANSPARENT CONDUCTIVE METAL OXIDE LAYER USING GRAVURE OFFSET PRINTING PROCESS AND METHOD OF FORMING A PATTERN OF TRANSPARENT CONDUCTIVE METAL OXIDE LAYER USING THE SAME

摘要

PURPOSE: An etching paste composition is provided to form micro-patterns by a low phosphate compound content, and to form micro-patterns with a line width of 30micron or less by a simple method. CONSTITUTION: An etching paste composition comprises: 5-45 weight% of non-water soluble binder selected from an acrylic copolymer, an acrylate copolymer, and an acryl-acrylate copolymer which comprise -OH or -COO-; 15-30 weight% of phosphate compound; and a residual solvent. A patterning method of a transparent conductive oxidation layer comprises: a step of preparing a substrate with a transparent conductive oxide layer; a step of printing the etching paste composition on the transparent conductive oxide layer; a step of etching the transparent conductive oxide layer by heat-treating the substrate; and a step of washing the substrate. [Reference numerals] (AA) Oxidation layer; (BB) Gravure offset printing; (CC) Etching paste printing; (DD) Heat treatment; (EE) Washing; (FF) Alkali washing liquid DI water; (GG) Patterned transparent conductive oxidation layer