Patent ID: 7791573
Filing Date: 2010-09-07
Classification: C09K,C23F,H01L

Abstract:
1. An etching method for a multiple layer of copper and molybdenum, comprising: forming the multiple layer of copper and molybdenum on a substrate; forming a photoresist pattern on the multiple layer; and etching the multiple layer with an etching solution including: about 5% to about 30% by weight of a hydrogen peroxide; about 0.5% to about 5% by weight of an organic acid; about 0.2% to about 5% by weight of a phosphate; about 0.2% to about 5% by weight of a first additive having nitrogen; about 0.2% to about 5% by weight of a second additive having nitrogen; about 0.01% to about 1.0% by weight of a fluoric compound; and de-ionized water making a total amount of the etching solution 100% by weight.