Patent ID: 7101809
Filing Date: 2006-09-05
Classification: C23F,H01L

Abstract:
1. A method for manufacturing a device, comprising: forming a stacked wiring layer on a substrate, the stacked wiring layer having a first layer and a second layer, wherein the first layer includes aluminum and the second layer includes titanium; forming a photoresist pattern on the stacked wiring layer; and performing a single etching for the stacked wiring layer using an etchant, wherein the etched first layer has substantially the same width as the etched second layer, and wherein the etchant includes a fluoric acid, a periodic acid and a sulfuric acid, in which the total weight ratio of the fluoric acid and the periodic acid is 0.05˜30 wt. %, the weight ratio of the sulfuric acid is 0.05˜20 wt. %, the weight ratio of the periodic acid to fluoric acid is 0.01˜2 wt. %.